An induced imaging system for viewing repeated pattern three-dimensional stereoscopic images with naked eyes

Abstract

The present invention belongs to stereoscopic imaging technology and discloses an induced imaging system for viewing a "repeating pattern type three-dimensional stereoscopic picture" with the naked eye. The main purpose is to solve the problem that it is difficult to form stereoscopic vision when viewing such a stereoscopic picture. The basic structure of the system is: a transparent reflective sheet (2) is covered on a stereoscopic picture piece (1), and a light-emitting lamp string (3) is placed in front of the picture piece. The lamp string has a virtual image bright spot (7) that is mirror-symmetrical with the reflective sheet. The viewer's eyes (6) look at the virtual image bright spot and intersect with the picture piece. The viewer sees the virtual image bright spot while seeing the pattern of the picture piece. This imaging system, which uses the light bright spot to induce the eyes to look through the picture piece to the back of the picture piece, greatly facilitates the formation of stereoscopic vision from the stereoscopic picture piece, especially enabling the viewing of a three-dimensional image from a very large-scale repeating pattern type three-dimensional stereoscopic picture piece. This provides conditions for the application of such stereoscopic pictures to large billboards, murals, etc.

Description

Technical Field

[0001] 01The present invention relates to stereoscopic vision imaging technology, and in particular provides an induced imaging system for forming stereoscopic vision for naked-eye viewing of repeated patterned three-dimensional stereoscopic images. Background Art

[0002] 02In the 1990s, a technique called "repeating pattern three-dimensional stereoscopic painting" that can make naked-eye viewers have stereoscopic vision was introduced into my country from abroad. In fact, this kind of painting has been simply called "three-dimensional stereoscopic painting" (or "stereoscopic painting") since its introduction to the present. However, the extension of the term "three-dimensional stereoscopic painting" has been greatly generalized, and it also refers to many other types of paintings. In order to avoid confusion, we have specially added an adjective here and called it "repeating pattern three-dimensional stereoscopic painting", and simply called it "repeating pattern stereoscopic painting". In the first few years after the introduction of repeating pattern stereoscopic painting into my country, a large number of such paintings designed and drawn by Chinese people were published in various magazines in the form of inserts, back covers, etc., and were also compiled into books for publication, such as the "Three-Dimensional Stereoscopic Painting Collection" (edited by Wen Ting) published by China Building Materials Industry Press in 1995. Later, many works were published on the Internet, such as a special website http: / / www.liuhs.com Liu Hongshi's Three-Dimensional Paintings were published. At the time, these paintings were widely known, and many people were eager to see if they could create three-dimensional images from them. Unfortunately, only a few viewers were able to experience stereoscopic vision, while most gave up after struggling to find the feeling. Furthermore, given the difficulty of achieving stereoscopic vision, designers and illustrators kept these paintings very small, typically the size of a magazine page, making them difficult to use in practical applications such as billboards or murals. For these reasons, after a period of popularity, these paintings have now fallen into disuse.

[0003] 03For such repetitive pattern stereoscopic paintings, it would be extremely valuable if there were a way to make stereoscopic vision easier for naked-eye viewers, especially for large-format paintings, so that most people could perceive the three-dimensional image. This patent proposes a technical solution to this problem. As background information for this technical solution, it is necessary to first provide a brief explanation of what repetitive pattern stereoscopic paintings are and the principles by which they create stereoscopic vision.

[0004] 04 First, model the repeating 3D image: decompose the image from top to bottom into many very narrow rows, and then further discretize each "row" into a number of "spots" arranged from left to right. Within these spots, all spots with the same pattern form a "spot string." That is, a spot string is composed of many spots with the same pattern arranged at equal or unequal intervals. A row is composed of many spot strings, and the patterns of the spots in each two spot strings are different. For a spot string composed of spots arranged at equal intervals, we call a line segment containing a spot and with a length equal to the interval a "picture element." Therefore, this spot string can be said to be composed of a repeated arrangement of a picture element with a displacement of one interval at a time, and the size of this interval is called the "spot spacing parameter" of the spot string.

[0005] 05 Simplify the repetitive pattern stereoscopic painting into a "three-spot model": Assume that there is only one spot string on this picture, which is composed of three spots that can be used as light points arranged at equal intervals from left to right, and its spot interval parameter is less than the interpupillary distance of the two eyes, such as Figure 1 and Figure 2 The left and right eyes E of the viewer are shown as points A, B, and C on the plane P. L and E R When looking at the picture P from the front, the following two situations may occur.

[0006] 06(i) If the eyes only focus on the "light dot string" consisting of three light dots on the picture, such as Figure 1 As shown, in this case, the two light rays from each light spot respectively directed to the left and right eyes will form a "light spot image" in the perception after the "fusion image" processing of the visual nervous system. The position of this light spot image coincides with the original light spot, that is, the "light spot image string" (or "light spot string image") composed of the three light spot images in the perception coincides with the light spot string on the picture.

[0007] 07(ii) If the eyes are looking at something behind the picture, e.g. Figure 2 As shown, in this case, the following results may occur: light point A and light point B separated by a gap, the two light points shoot two rays AE towards the left and right eyes respectively L and BE R , and its reverse extension line intersects at A L and B R A point A L -B R , these two rays AE L and BE R Similar to point A L -B R A light point shoots two rays towards the left and right eyes, so that the two rays AE L and BER After being processed by the fusional process of the visual nervous system, a light spot image in the sensation may be formed, and the position of this light spot image is at point A L -B R ; Similarly, a light spot image in the sensation may also be formed at point B L -C R ; The two light spot images A L -B R and B L -C R in the sensation form a "string of light spot images" behind the picture and maintain a certain distance from the picture. This distance is called the "depth diameter" of the string of light spot images. The visual nerve generates a "depth diameter sense", that is, stereoscopic vision is generated; this way of generating stereoscopic vision from the string of patches is called "translation superposition stereoscopic imaging", and it is the translation superposition stereoscopic imaging of "translating one interval".

[0008] 08 As described in (ii) above, the distance x between the formed string of light spot images and the picture can be calculated according to geometry: x = (d÷(e - d))×s, where d is the adjacent patch interval, e is the binocular pupillary distance (about 60 - 65 mm), and s is the distance from the eyes to the picture; this formula shows that when the distance s from the eyes to the picture is fixed, on the premise that the patch interval d is less than the pupillary distance e, the larger d is, the larger x is, that is, the larger the depth diameter of the string of light spot images; if the patch interval d is equal to or greater than the pupillary distance e, a positive x cannot be calculated, that is, the string of light spot images cannot be seen; however, in fact, this formula only accurately conforms to the actual situation when x calculated when d is relatively small and s is not too large. This is because there are other mechanisms of the visual nerve in the formation of stereoscopic vision, so the actual situation is: when d < e and close to e, the depth diameter of the string of light spot images is less than x calculated by the formula, and when d > e, as long as d is not too large, the string of light spot images at a relatively far distance can still be seen; when the distance s from the eyes to the picture is very large, the patch interval d can even reach twice the pupillary distance e and still may form a depth diameter sense.

[0009] 09 As described above, when both eyes fixate on the back of the three-light-spot picture, two light spot images A L -B R and B L -C R with a determined depth diameter may be seen; at the same time, a light spot image A R and C L may also be seen on the left and right sides of these two light spot images respectively, see Figure 2 , but in the sensation, the depth diameter of these two light spot images is not clear, because A R is only the image formed by the right eye viewing, and C LHowever, the image formed by the left eye is not the result of the fusion of the two eyes; unless there is other information from the picture to support it, it is possible for the two light spot images to have a definite depth.

[0010] If a repeating pattern stereoscopic painting consists of only three spots arranged at equal intervals, it is difficult to see the image with a deep diameter as described in (ii) above. Generally, repeating pattern stereoscopic paintings adopt the following methods to facilitate the formation of stereoscopic vision: (a) the spot string contains many spots, that is, a single element is repeated many times; (b) many different spot strings with the same spot interval and length are placed in the same line segment of the same length to increase the spot density. In this case, a line segment with a size equal to the interval contains many spots with different patterns, forming a line segment containing many spots. (c) placing a string of spots that are not easy to produce depth perception near a string of spots that are easy to produce depth perception. When the latter produces depth perception, the former may also easily produce depth perception by comparison with the latter. This effect is called the "comparison-expansion effect of forming stereoscopic vision"; the spot strings that are not easy to produce depth perception mentioned here include the following: short spot strings containing fewer spots, spot strings with unequal intervals, and spots in the spot strings whose patterns are not the same but similar.

[0011] 11 Figure 3It is a "repeated pattern stereogram model" summarized from common repeated pattern stereograms. The following will explain what three-dimensional scenes can be seen from it: In drawing row 3.1, there are two patch strings, and the patches are "O-shaped" patterns and "I-shaped" patterns respectively. The patch interval parameters are both d1. Drawing row 3.2 is exactly the same as drawing row 3.1; in drawing row 3.3, the patch interval parameter of the patch string is d2, and d2 < d1; in vision, the patch string images with depth generated by drawing rows 3.1 and 3.2 appear as the back curtain of a stage, while what drawing row 3.3 shows is the front edge of the stage; in drawing row 3.4 and the adjacent drawing rows, from top to bottom, the patch interval parameters of the patch strings gradually decrease from d1 to d2, and what is shown is a stage stretching forward from the lower edge of the back curtain; drawing row 3.5 and the two drawing rows above and below it have exactly the same structure and can be divided into left, middle, and right parts. The middle part is three patch strings with a patch interval parameter of d3, d3 < d1 and d3 > d2. In the left part, the patches are not arranged at equal intervals but decrease from d1 to d3 from left to right. In the right part, the adjacent patch intervals decrease from d1 to d3 from right to left. Thus, what these three drawing rows show is a curved surface object with the middle protruding forward and the two sides approaching the back curtain backward, located on the stage. The "repeated layout" of drawing rows 3.1 and 3.2 has strict periodicity, while the "repeated layout" of drawing row 3.5 sandwiched between them does not have strict periodicity. In terms of the way of repeated layout, it is easy to generate depth perception from the former but difficult from the latter. However, with the help of the "comparison-expansion effect of forming stereoscopic vision", when the former generates depth perception, the latter close to it will be带动 to generate depth perception; for another example, looking down from drawing row 3.2 through drawing row 3.4 to drawing row 3.3, because there is a through line from top to bottom connecting the intrinsically related patches in each row, the "comparison-expansion effect" is more likely to play a role. As long as one drawing row generates depth perception, it will带动 all drawing rows to generate depth perception. For a large number of published repeated pattern stereograms, the basic methods of showing stereoscopic images are all reflected in the model shown in Figure 3 shown below.

[0012] How to view repeated pattern stereograms to form stereoscopic vision? Many methods have been reported. For example, the various methods disclosed in the article "Three-dimensional Stereogram" on "Sogou Encyclopedia" can be seen in https: / / baike.sogou.com / v411113.htmA commonly mentioned method is as follows: One eye is focused out of focus on two dots on the upper edge of a stereoscopic image, creating "double vision" and seeing four dots. Then, the distance between the eyes and the image is adjusted. When the four dots become three, the image can be seen in three dimensions. However, viewers generally do not know how to achieve double vision and see four dots, making this method difficult to perform. Comparing various methods, the following method is relatively effective: One eye is focused on a marker above and behind the image, experiencing and "remembering" the visual nerve state associated with focusing on this marker. The eye is then directed downward until the image blocks the view, maintaining the visual nerve state associated with focusing on the marker. This allows the viewer to see the three-dimensional image. However, when the view shifts to the image below, the visual nerve state often immediately reverts to focusing solely on the image itself. Focusing on an invisible marker is difficult to achieve, making this method ineffective for producing stereoscopic vision. Therefore, how to easily produce stereoscopic vision when viewing repetitive stereoscopic images with the naked eye remains a challenge. In particular, if this problem can be solved for large-scale repetitive pattern stereoscopic paintings, such stereoscopic paintings can be applied to large billboards, murals, etc., which is quite meaningful. Summary of the Invention

[0013] The present invention is mainly intended to solve the problem that it is difficult to form stereoscopic vision when viewing repetitive pattern stereoscopic paintings with the naked eye. An induced imaging system is proposed, which makes it easier to see the three-dimensional image of repetitive pattern stereoscopic paintings from small to large formats, thereby enabling this technology to be practically applied in advertising billboards, artistic murals, etc.

[0014] 14 In preparation for describing the technical solution, the meanings of some special words and terms are agreed upon first: ⑴ The so-called "repeating pattern three-dimensional picture", such as pictures printed on paper, pictures displayed on billboards, pictures displayed on electronic screens, etc., refers to all repeating pattern three-dimensional pictures displayed on a flat surface; ⑵ Description of the orientation: the viewer faces the picture to determine the orientation, and the viewer is said to be in the "front" of the picture; the direction from left to right of the picture is called "horizontal", and the horizontal length of the picture is called "horizontal length"; the direction from top to bottom of the picture is called "vertical", and the vertical length of the picture is called "vertical length"; the plane passing through the upper edge of the picture and perpendicular to the picture is called "top surface of the picture", and the plane passing through the lower edge of the picture and perpendicular to the picture is called "bottom surface of the picture"; ⑶ The "transparent reflective sheet covering the front of the picture", such as the smooth transparent plastic sheet covering the paper copy picture, the glass plate in front of the billboard picture, the reflective protective film on the surface of the electronic screen, etc., all repeating patterns In the case where a 3D picture can be displayed normally to the outside and external light spots can form a mirror-symmetrical virtual image behind the picture, it is considered that the picture is covered with a "transparent reflective sheet" in front; ⑷ The so-called "lamp beads", such as a single LED lamp, a small light bulb, etc., refer to all point light sources and quasi-point light sources; ⑸ The so-called "lamp string" is composed of a number of identical lamp beads arranged at equal intervals on a straight line segment, and the interval between two adjacent lamp beads is also called the "lamp bead interval" of this lamp string; ⑹ The "maximum spot interval" and "minimum spot interval" of a repeating pattern 3D picture: In a repeating pattern 3D picture, the patterns of the spots in each spot string are the same (or similar), and the intervals between adjacent spots are either equal or unequal. The intervals between adjacent spots in the left and right directions of all spot strings of the 3D picture form a set. The largest and smallest ones in this set are respectively called the "maximum spot interval" and "minimum spot interval" of the 3D picture. Figure 3 d1 and d2 in .

[0015] 15 The basic idea of the technical solution of the present invention is that the key to forming stereoscopic vision when viewing a stereoscopic picture with repetitive patterns with the naked eye is to adjust the state of the visual nerve to look at a certain point behind the stereoscopic picture and to make the line of sight pass through the stereoscopic picture. This can be achieved by inducing with specially set light spots. For this purpose, an induced imaging system is established: a transparent reflective sheet is covered on the stereoscopic picture, and luminous lamp beads are placed in front of the picture. The lamp beads have a mirror-symmetrical virtual image with respect to the transparent reflective sheet. The viewer's line of sight looking at the virtual image of the lamp beads passes through a point on the stereoscopic picture. The viewer sees the virtual image of the lamp beads and the picture pattern at the same time, thereby forming stereoscopic vision.

[0016] 16 The basic contents of the technical solution of the present invention are described in (1) to (7) below.

[0017] 17. (1) An induced imaging system for viewing a repetitive pattern stereoscopic picture, comprising: a repetitive pattern stereoscopic picture sheet, a transparent reflective sheet covering the front of the picture sheet that is both transparent and has a reflective effect on light, and a light string group; the light string group is composed of a single light string or several light strings that are parallel in direction, each light string is composed of a plurality of identical lamp beads arranged at equal intervals from left to right, where "lamp beads" means a point light source or a quasi-point light source, and the interval between two adjacent lamp beads in each light string is also called the light string. The "lamp spacing" of the light strings; each light string is parallel to the 3D picture, at a distance of at least 100 mm from the picture, and this distance should be greater than 1 / 4 of the distance from the viewer's eyes to the picture; the relative positions of the light string group, the 3D picture, and the viewer's eyes meet the following conditions: light emitted by each light string is reflected by the transparent reflective sheet to form a mirror-symmetrical virtual image of the light string; the viewer's eyes can see all the virtual images of the light strings, and the line of sight of the virtual images of the light strings intersects the image of the 3D picture. The brightness of the light beads in the light string group needs to be adjusted according to the display brightness of the repeating pattern 3D picture, so that the viewer can clearly see both the virtual images of the light strings created by the transparent reflective sheet and the pattern of the 3D picture.

[0018] 18(2) According to the induced imaging system described in (1), the light string group is a light string, the length of the light string is the same as the horizontal length of the 3D picture piece, and the interval D between the light beads of the light string is not less than 20 mm and not more than 80 mm.

[0019] 19(III) According to the induced imaging system described in (I), the light string group consists of N light strings, where N is 2 or 3; the N light strings are in the same plane and are arranged from top to bottom in the plane; the plane is parallel to the three-dimensional picture, and the distance from the picture is at least 100 mm, and the distance should be greater than 1 / 4 of the distance from the viewer's eyes to the picture; the length of each light string is the same as the horizontal length of the three-dimensional picture; the lamp beads of each light string are the same as the spacing D, which is not less than 40 mm and not more than 80 mm; the N light strings also meet the following conditions: the vertical projection of all the lamp beads of the N light strings in the same plane onto a horizontal line in the plane forms a light string with a lamp bead spacing of D / N.

[0020] 20(IV) According to the induced imaging system described in (I), the light string group consists of N light strings, where N is 2, 3 or 4; the N light strings are in the same plane and are arranged from top to bottom in the plane; the plane is parallel to the three-dimensional picture, and the distance from the picture is at least 100 mm, and the distance should be greater than 1 / 4 of the distance from the viewer's eyes to the picture; the length of each light string is the same as the horizontal length of the three-dimensional picture; the lamp beads of the first light string of the N light strings are spaced D, D is not less than 15 mm and not more than 30 mm, and the lamp beads of the nth light string are spaced n times D, that is, nD, where n is an integer from 2 to N.

[0021] 21(V) According to the induced imaging system described in any one of (1) to (4), the luminous brightness of the lamp beads in the light string group can be automatically adjusted by an electronic automatic control device according to the display brightness of the repetitive pattern stereoscopic painting, so that the viewer can clearly see both the virtual image of the light string caused by the transparent reflective sheet and the pattern of the stereoscopic painting.

[0022] 22(vi) According to the induced imaging system described in any one of (i) to (iv), all or part of the lamp beads in the lamp string group emit light in the following manner: constant brightness lighting and flashing lighting are alternately performed to attract the viewer to look at the virtual image of the lamp beads behind the picture.

[0023] 23(VII) An induced imaging system according to any one of (2) to (4), wherein in addition to the one light string group, a second light string group of the same structure is added, and the plane in which the second light string group is located is also parallel to the three-dimensional picture film and is at least 100 mm away from the picture film; and the two light string groups also meet the following conditions: the height of the lowest light string in the first light string group relative to the bottom surface of the picture is higher than the height of the highest light string in the second light string group relative to the bottom surface of the picture by at least one-third of the vertical length of the three-dimensional picture.

[0024] Whether or not a viewer can see a stereoscopic image when viewing a repetitive pattern stereoscopic painting depends on two factors: ① The drawing of the repetitive pattern stereoscopic painting itself must comply with the requirements of the stereoscopic imaging rules, and ② The viewer's adjustment of the line of sight of both eyes must achieve the ideal state of stereoscopic imaging. Regarding ①, the principles and drawing rules for the stereoscopic imaging of repetitive pattern stereoscopic paintings have been explained in the "Background Art". Below, we will further explain these rules in detail to help beginners understand and master the drawing of such pictures. Regarding ②, for a compliant repetitive pattern stereoscopic painting, even without an induced imaging system, the viewer can produce stereoscopic vision after repeated attempts, if they "happen" to adjust their line of sight to the ideal state, but this is very time-consuming and laborious. With the help of the induced imaging system described above, the viewer's line of sight can be induced to quickly and automatically achieve the ideal state of stereoscopic imaging. Below, we will explain the reasoning behind this and the measures to further enhance its inductive effect.

[0025] 25(I) In the drawing of a repeating pattern stereogram, the selection of geometric parameters of each graphic element: (1) The ratio of the "maximum spot spacing" to the "minimum spot spacing" of a repeating pattern stereogram: This ratio determines the relative depth of the front and back parts of the three-dimensional image expressed by the stereogram. If this ratio is too small, the three-dimensional image becomes a flat relief. If this ratio is too large, the distance between the front and back ends of the three-dimensional image is too large, and the viewer's visual ability may not be able to form such a three-dimensional image. This ratio is generally preferably 1.2 to 1.7; (2) The selection of the "maximum spot spacing" of the stereogram: People are more willing to see three-dimensional scenes with a larger depth from stereograms, so the maximum spot spacing d of the stereogram should be max Larger, but d max Too large will make stereoscopic vision impossible to form, generally d max To be comparable to the interpupillary distance e of both eyes, calculate it as e = 60 mm. When the distance s between the eyes and the picture is less than 1500 mm, d max Close to 60 mm. When the distance s between the eye and the picture is greater than 1500 mm, d max The number of millimeters is close to "the square root of the number of millimeters of s multiplied by 1.55" (this is an empirical formula). For example, when s = 2000 mm, take d max ⑶ The lower limit of the “minimum spot spacing”: When the distance s between the eye and the picture is large, in order to enable the eye to see the spot spacing clearly in a larger range of the picture, the minimum spot spacing d of the stereoscopic picture is min It cannot be too small. When the distance s between the eye and the picture is less than 1500 mm, d min Greater than d max / 1.5, when the distance s between the eye and the picture is greater than 1500 mm, take d min The number of millimeters is greater than the square root of the number of millimeters of s multiplied by 1.03 (this is an empirical formula). For example, when s = 2000 mm, take d min It is 47 mm.

[0026] 26(II) Regarding the design of the light string group structure: ⑴ The light string group design given in (iii) of the above technical solution is N light strings with the same lamp bead spacing D. When D is large, the lateral density of the lamp beads is small for a single light string. However, here there are N light strings, and the lateral density of the lamp beads increases by N-1 times. The larger lateral density of the lamp beads is conducive to comparing the pattern string with the bright spot of the light nearby, thereby easily forming a sense of depth; ⑵ The light string composed of lamp beads arranged at equal intervals, its mirror image behind the transparent reflective sheet is equivalent to a new repeating pattern stereoscopic picture, so it can also realize "translation and superposition stereoscopic imaging". The three-dimensional image formed by translating one interval or two or three intervals is clear and concise, and is at a position farther away from the picture, so it also has a special inducing effect on the three-dimensional imaging of the entire picture; the light string group design mentioned in (iv) of the above technical solution is made with this mechanism in mind.

[0027] 27(III) The distribution of the "apparent bright spot" of the virtual image of the lamp beads within the picture: When both eyes focus on a virtual image of a lamp bead behind the picture, a bright spot can be assumed at the intersection of their visual direction and the picture plane. This bright spot is called the "apparent bright spot" of the virtual image of the lamp bead within the picture plane. Corresponding to all the lamp beads in the light string group, all the "apparent bright spots" within the picture plane occupy a certain area within the picture plane. For the pattern strings within this area, or those closer to this area, stereoscopic vision is more easily formed when viewing them, because the light induction effect here is stronger. Therefore, the area occupied by these "apparent bright spots" should be arranged as close as possible to the area in the center of the picture plane where stereoscopic formation is relatively difficult.

[0028] 28(IV) The problem of matching the luminous brightness of the lamp beads with the display brightness of the 3D picture: If the light seen from the picture is too bright, its halo will make the picture blurred and seriously affect the 3D imaging; if the light is too weak, it will not have any inductive effect; therefore, it is necessary to adjust the luminous brightness of the lamp beads in the light string group, preferably using an electronic automatic control device to automatically adjust the luminous brightness of the light string group according to the display brightness of the picture.

[0029] 29(V) The practice of inducing stereoscopic image formation by dividing the image into smaller areas: When viewing a stereoscopic image with a repetitive pattern, since the spacing between the dots in the pattern train determines the depth of the stereoscopic image, stereoscopic vision can only be formed within a certain range of the pattern train if the spacing between dots within that range is clearly discernible. Without eye movement, the visual field within which image details can be clearly seen is approximately 30 degrees, known as the "visual field of view where the image can be clearly seen." If all "visual fields of view where the eyeball can be moved" are added together, the visual field is approximately 100 degrees. Therefore, when the stereoscopic image is large, eye movement is required, repeatedly shifting the "visual field of view where the image can be clearly seen," forming a partial stereoscopic image from each part of the image, and then integrating the remembered impressions to form the complete stereoscopic image. To this end, the light string group can be divided into several sections from left to right corresponding to the various parts of the picture from left to right, so that each section can be temporarily "flashed" in turn in a cyclic manner (when not flashing, it still glows at a constant brightness). The purpose is to attract the viewer's attention to the corresponding part of the picture by flashing, so that the various parts of the picture can form a three-dimensional vision one after another under the guidance of the light.

[0030] 30(VI) Regarding the size of the repeating pattern 3D picture: (1) Horizontal length of the picture: In terms of the purpose of the 3D picture, if it is only required to form a stereoscopic vision when viewing each part of the 3D picture, then the horizontal length of the picture is not limited and can be any length; if the requirement is to eventually see the 3D image corresponding to the entire picture, then the horizontal length of the picture is limited, and generally the horizontal length of the picture should be roughly equivalent to the distance from the eye to the picture; (2) Vertical length of the picture: Since the light string group can only be placed near the top or bottom of the picture, it is difficult to induce imaging by dividing the 3D picture from top to bottom into smaller areas. to be implemented; however, the "comparison-expansion effect of forming stereoscopic vision" can be used to make the vertical length of the 3D picture larger. The method is to make the 3D picture into a structure with an internal connection between the patterns of the rows of pictures from top to bottom, for example, there are many through lines from top to bottom, so that the "comparison-expansion effect" can be strongly exerted, so that a few rows of pictures drive all the rows of pictures to form a stereoscopic vision; in addition, two upper and lower light string groups can be used to induce the stereoscopic imaging of the upper and lower parts of the 3D picture; using one light string group can generally make the vertical length of the 3D picture reach half the distance between the eyes and the picture, and using two can double the vertical length.

[0031] 31 The following further describes the effect of viewing a 3D image of a repeating pattern using the induced imaging system of the present invention.

[0032] 32. People's stereoscopic vision abilities vary considerably when viewing three-dimensional objects. However, approximately 80% of viewers can achieve normal stereoscopic vision when viewing 3D movies in theaters. However, stereoscopic vision is significantly more challenging when viewing repetitive stereoscopic images with the naked eye. Preliminary experiments indicate that, when the production and display quality of repetitive stereoscopic images are high and the induced imaging system is optimized as described above, over 60% of viewers can rapidly develop stereoscopic vision. For more complex repetitive stereoscopic images, stereoscopic vision may take two to three seconds, while for standard stereoscopic images, it is almost instantaneous.

[0033] 33. Once stereoscopic vision is established when viewing a repetitive pattern stereoscopic image using the induced imaging system, the stereoscopic image generally continues to be visible even when the lights are turned off, as long as the gaze remains fixed. After viewing the stereoscopic image, the eyes can move closer to the image without restriction, maintaining stereoscopic vision and allowing for even clearer visualization of every detail, much like viewing a 3D object from a distance. Because the induced imaging system rapidly establishes stereoscopic vision, it is also possible to create animated films using the repetitive pattern stereoscopic image as a single frame. Once stereoscopic vision is established in the first frame, the viewer can maintain stereoscopic vision and perceive the dynamic 3D image as long as the motion of the image is not too rapid.

[0034] 34 Repeating pattern stereoscopic paintings and the accompanying induced imaging system are used in advertising billboards, artistic murals, etc. They are simple to produce and have very low cost, but can display three-dimensional images to the public, which are vivid and interesting. Therefore, it is likely to become a new advertising method and art appreciation form that people like. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 35 Figure 1 It is a schematic diagram of the first case of visual imaging using the "three-pattern model" of a repeating pattern stereoscopic painting. The diagram shows that stereoscopic vision cannot be formed when the viewer only focuses on the picture of the stereoscopic painting.

[0036] 36 Figure 2 It is a schematic diagram of the second situation of visual imaging using the "three-pattern model" of a repeating stereoscopic painting. The diagram shows that stereoscopic vision can only be formed when the viewer places his or her gaze behind the stereoscopic painting.

[0037] 37 Figure 3 It is a schematic diagram of a model summarized from common repetitive pattern stereoscopic paintings. The three-dimensional scene it shows is "a curved object above the stage in front of the back curtain."

[0038] 38 Figure 4Schematic diagram of the induced imaging system for viewing a 3D image of a repeating pattern according to the present invention, wherein a light string group is used.

[0039] 39 Figure 5 This is a structure of the light string group described in the technical solution, in which two light strings in the light string group have the same lamp bead spacing.

[0040] 40 Figure 6 This is another structure of the light string group described in the technical solution, in which the intervals between the lamp beads in the second and third light strings in the light string group are integer multiples of the first one.

[0041] 41 Figure 7 Schematic diagram of another structure of the induced imaging system for viewing stereoscopic images according to the present invention, in which two light string groups are used. DETAILED DESCRIPTION

[0042] 42 The following describes the specific implementation of the technical solution of the present invention in conjunction with the accompanying drawings.

[0043] 43 Figure 4 The present invention shows a specific structure of an induced imaging system for viewing stereoscopic images. As can be seen from the figure, a transparent reflective sheet 2 covers the front of a repeating stereoscopic image 1. A light string group 3 is fixed to a light barrier 4, the vertical length of which is a. The light string group is parallel to the image and is at a distance of l from the image. The upper edge of the light barrier is higher than the top surface 5 of the image by a dimension b. The distance between the viewer's eye 6 and the image is s, and the eye is lower than the top surface by a dimension y. A virtual image 7, mirror-symmetrical to the light string group 3 about the transparent reflective sheet 2, is located behind the image. The line of sight of the eye looking at the virtual image 7 of the light string group intersects the image. The light string group is composed of one or more light strings, each of which is composed of a plurality of identical lamp beads arranged at equal intervals from left to right. The light strings can be purchased from various specifications of LED light strings available on the market. Mature technology and readily available electronic automatic control devices are available for brightness and flicker control of the light strings.

[0044] 44 Figure 7 Shows a specific structure of the induced imaging system mentioned in the above technical solution (VII); Figure 4 In addition to the illustrated structure, a second light string group 3′, identical in structure to light string group 3, is added. Light string group 3′ is secured to a light barrier 4′, also having a vertical length a. Light string group 3′ is parallel to picture 1 and spaced a distance l′ from the picture. The lower edge of light barrier 4′ is a dimension b lower than picture bottom 5′. A virtual image 7′, mirror-symmetrical to light string group 3′ about transparent reflective sheet 2, is positioned behind the picture. Eye 6's line of sight, focused on virtual image 7′, intersects the picture. When the vertical length of a 3D picture is long, this induced imaging system with two light string groups facilitates stereoscopic vision.

[0045] 45 or less pairs Figure 4 The structure shown in the figure gives five specific implementation examples. First, nine geometric parameters are listed for each of them: the distance between the eye and the picture s, the maximum spot interval d max , minimum spot interval d min , distance between the light string group and the picture l, distance between the eyes and the top of the picture y, vertical length of the light baffle a, height of the upper edge of the light baffle relative to the top of the picture b, horizontal length of the picture H, vertical length of the picture V (the unit "millimeter" is omitted in the values listed below):

[0046] Example 1, s = 400, d max =40,d min =27, l=100, y=100, a=40, b=20, H=400, V=300;

[0047] Example 2, s = 800, d max =50,d min =34, l=200, y=200, a=60, b=25, H=800, V=600;

[0048] Example 3, s = 1200, d max =58,d min =39, l=300, y=300, a=80, b=30, H=1200, V=800;

[0049] Example 4, s = 1600, d max =63,d min =43, l=400, y=350, a=100, b=35, H=1600, V=900;

[0050] Example 5, s = 2000, d max =68,d min =47, l=500, y=400, a=120, b=40, H=1600, V=900.

[0051] The light string group in Example 46, 1, adopts the structure described in (2) of the above technical solution, that is, only one light string is used, and the distance D between the lamp beads is 40 mm; this light string is fixed on a light shielding plate, and the light shielding plate is installed on the upper edge of the picture with a bracket; all the lamp beads in the entire light string are illuminated in the following way: flashing for 5 seconds, then illuminating at a constant brightness for 10 seconds, and repeating the cycle. The flashing is to attract the viewer to subconsciously look at the bright light behind the picture, so as to prevent the viewer from ignoring the light and only looking at the picture.

[0052] 47 The light string groups in Examples 2 and 3 adopt the structure described in (3) of the above technical solution, such as Figure 5As shown, here N=2, that is, the light string group consists of two light strings, and the distance D between the lamp beads is 50 mm; the two light strings are fixed on the light baffle, and the distance between the two light strings is slightly smaller than the vertical length of the light baffle; the light baffle is installed on the upper edge of the picture with a bracket; the light string group is divided into two equal sections from left to right, and all the lamp beads in each section are illuminated in a manner of: flashing for 5 seconds, then emitting at a constant brightness for 5 seconds, and repeating the cycle, but the flashing time of the two sections is staggered, that is, when the flashing of the first section ends, the flashing of the second section begins.

[0053] The light string groups in Examples 4 and 5 adopt the structure described in (IV) of the above technical solution, such as Figure 6 As shown, here N=3, that is, the light string group consists of three light strings, the distance D between the lamp beads of the first string is 25 mm, the second string is 50 mm, and the third string is 75 mm; the three light strings are fixed on the light baffle, and the distance between the first and third light strings is slightly smaller than the vertical length of the light baffle; the light baffle is mounted on the upper edge of the picture with a bracket; the light string group is divided into three equal sections from left to right, and all the lamp beads in each section are illuminated in a manner as follows: flashing for 5 seconds, then constant brightness for 10 seconds, and the cycle is repeated, but the flashing time of these three sections is staggered, that is, the first section flashes, then the second section flashes, then the third section flashes, and so on.

[0054] 49 Experiments have shown that when the distance s between the eyes and the stereoscopic image is greater than 2000 mm, for example, when s = 3000 mm, the difficulty of forming stereoscopic vision increases significantly. For example, the time spent on producing stereoscopic vision becomes longer, or the produced stereoscopic vision is unstable and appears and disappears from time to time. Some people with weak visual abilities can no longer form stereoscopic vision.

[0055] 50 pairs Figure 7 The structure shown in FIG6 is given as a specific implementation example, that is, Example 6. Among the nine geometric parameters, the first seven are the same as those in Example 4, namely: s = 1600, d max =63,d min =43, l=400, y=350, a=100, b=35 (unit is mm); however, the horizontal length of the picture here is H=800 mm, and the vertical length is V=1200 mm. Since V is larger, two light string groups are used; the structure and size of each light string group and the light baffle fixing it are the same as those in Example 2; the first light string group 3 is mounted on the upper edge of the picture with a bracket, and the distance from the picture is l=400 mm, and the second light string group 3′ is mounted on the lower edge of the picture with a bracket, and the distance from the picture is l′=200 mm, and the lower edge of the light baffle 4′ is b=35 mm lower than the bottom surface 5′ of the picture; the segmentation and lighting method of the two light string groups are also the same as those in Example 2, and the lighting of the upper and lower corresponding parts of the two light string groups is synchronized.

[0056] 51 The basic feature of the technical solution of the present invention is that the induced imaging system uses the mirror-symmetrical virtual image of the light string behind the three-dimensional painting to induce the eyes to look through the picture and look at a certain place behind the picture; the above specific implementation method is a detailed description of the technical solution, but it is not a limitation of the scope of protection of the present invention. All equivalent replacements, similar improvements, etc. made under the basic features of the technical solution of the present invention fall within the scope of protection of the present invention.

Claims

1. An induced imaging system for viewing a repetitive pattern stereoscopic picture, comprising: Repeating pattern 3D picture cards, a transparent reflective sheet covering the front of the picture cards that is both transparent and has a reflective effect on light, and a light string set; The light string group is composed of one or multiple parallel light strings, each of which is composed of a number of identical lamp beads arranged at equal intervals from left to right. Here, "lamp beads" refers to point light sources or quasi-point light sources. The interval between two adjacent lamp beads in each light string is also called the "lamp bead interval" of this light string. The lamp bead interval of each light string in the light string group is not less than 15 mm and not more than 120 mm. Each light string is parallel to the three-dimensional picture and is at least 100 mm away from the picture, and this distance should be greater than the viewer's eye. 1 / 4 of the distance to the picture; the relative positions of the light string group, the three-dimensional picture and the viewer's eyes meet the following conditions: the light emitted by each light string is reflected by the transparent reflective sheet to form a mirror-symmetrical light string virtual image, the viewer's eyes can see all the light string virtual images, and the line of sight of viewing the light string virtual images intersects with the picture of the three-dimensional picture; it is also necessary to adjust the luminous brightness of the lamp beads in the light string group according to the display brightness of the repeated pattern three-dimensional picture, so that the viewer can clearly see both the light string virtual image caused by the transparent reflective sheet and the pattern of the three-dimensional picture.

2. The induced imaging system according to claim 1, wherein the light string group is a single light string, the length of the light string is the same as the horizontal length of the 3D picture piece, and the interval D between the light beads of the light string is not less than 20 mm and not more than 80 mm.

3. The induced imaging system according to claim 1, wherein the light string group comprises N light strings, where N is 2 or 3; the N light strings are in the same plane and are arranged from top to bottom in the plane; the plane is parallel to the 3D picture and is at least 100 mm away from the picture, and the distance between the plane and the picture should be greater than 1 / 4 of the distance between the viewer's eyes and the picture; the length of each light string is the same as the horizontal length of the 3D picture; the lamp beads of each light string are the same, all D, and D is not less than 40 mm and not more than 80 mm; the N light strings also meet the following conditions: the vertical projection of all the lamp beads of the N light strings in the same plane onto a horizontal line in the plane forms a light string with a lamp bead spacing of D / N.

4. The induced imaging system according to claim 1, wherein the light string group comprises N light strings, where N is 2, 3, or 4; the N light strings are located in the same plane and arranged from top to bottom in the plane; the plane is parallel to the 3D image and is at least 100 mm away from the image, and the distance between the plane and the image is greater than 1 / 4 of the distance between the viewer's eyes and the image; the length of each light string is the same as the horizontal length of the 3D image; the spacing between the lamp beads in the first light string of the N light strings is D, which is not less than 15 mm and not more than 30 mm, and the spacing between the lamp beads in the nth light string is n times D, that is, nD, where n is an integer from 2 to N.

5. The induced imaging system according to any one of claims 1 to 4, wherein the luminous brightness of the lamp beads in the light string group can be automatically adjusted according to the display brightness of the repetitive pattern stereoscopic painting by an electronic automatic control device, so that the viewer can clearly see both the virtual image of the light string caused by the transparent reflective sheet and the pattern of the stereoscopic painting.

6. The induced imaging system according to any one of claims 1 to 4, wherein all or part of the lamp beads in the lamp string group emit light in the following manner: constant brightness lighting and flashing lighting are performed alternately to attract viewers to look at the virtual image of the lamp beads behind the picture.

7. The induced imaging system according to any one of claims 2 to 4, wherein in addition to the one light string group, a second light string group of the same structure is added, the plane in which the second light string group is located is also parallel to the three-dimensional picture and the distance from the picture is at least 100 mm; the two light string groups also meet the following conditions: the height of the lowest light string in the first light string group relative to the bottom surface of the picture is higher than the height of the highest light string in the second light string group relative to the bottom surface of the picture by at least one-third of the vertical length of the three-dimensional picture.

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