A method, device, terminal equipment and storage medium for reverse perspective painting

Abstract

The present invention discloses a reverse perspective painting method, which is divided into the following: selecting one or more contact points of a painting object; taking the contact point as the center, dividing the painting object into regions according to the three-dimensional spatial position of the painting object and the distance from the transparent object; arranging the painting object in the picture according to the principle of small near and large far regions, outlining the outline and details of the painting object; coloring the outline of the painting object, and according to the regional division, making the clarity of the outer region gradually decrease with the contact point as the center; smudge the edges of adjacent regions to make the edges of the painting object transition naturally; coloring the perspective background on the completed drawing to complete the entire painting work. The present invention uses the principle of large far and small near, so that the scenery and characters in the picture appear to have the effect of walking out of the picture directly, so that the viewer can experience the sense of the picture more intuitively and deeply, thereby giving the viewer a stronger sense of participation.

Description

Technical Field

[0001] The present invention relates to the technical field of perspective painting, and in particular to a reverse perspective painting method, device, terminal equipment and storage medium. Background Art

[0002] Traditional paintings generally use a brush to draw patterns directly on canvas or paper, such as sketches, watercolors, etc. The finished paintings are all flat and intuitive works. With the development of painting technology, there are more diverse requirements for the form of works. Special painting techniques are required for some special painting scenes, such as the picture effect in a perspective state. The painting scene in this scene requires higher painting skills because the painting scene needs to process the perspective objects in the background and the front end while painting objects or characters. The painting work is time-consuming and laborious, and it is difficult to achieve good results. Summary of the invention

[0003] In view of the above defects or shortcomings, the object of the present invention is to provide a reverse perspective drawing method, apparatus, terminal device and storage medium.

[0004] To achieve the above purpose, the technical solution of the present invention is:

[0005] A reverse perspective painting method, comprising:

[0006] 1) Select one or more contact points of the painting object, and divide the painting object into regions based on the three-dimensional spatial position of the painting object and the distance from the transparent object, taking the contact points as the center;

[0007] 2) Arrange the painting objects in the picture according to the principle of small near and large far, and outline the outline and details of the painting objects;

[0008] 3) Switch the drawing tool, color the outline of the drawing object, and divide it into regions so that the clarity of the area gradually decreases from the contact point to the outside.

[0009] 4) Blending the edges of adjacent areas to make the edges of the painting objects transition naturally;

[0010] 5) Color the perspective background on the finished drawing to complete the entire painting, making the main body of the picture small near and large far, and the realistic part of the picture occupies less than 10% of the entire picture.

[0011] Furthermore, the selecting one or more contact points of the painting object and dividing the painting object into regions based on the contact points as the center according to the three-dimensional spatial position of the painting object and the distance from the transparent object specifically includes:

[0012] Select one or more points closest to the viewer in the entire dynamic link of the painting object as contact points, and the contact points are in the same plane position, which is defined as the initial surface;

[0013] Centered on the contact point or initial surface;

[0014] According to the spatial distance of the painting object, the painting object is placed in an inverted cone structure;

[0015] Set the distance threshold and division surface. Each distance threshold is used to divide the inverted cone into multiple areas, and each area corresponds to a level.

[0016] Furthermore, the layout of the painting objects in the picture according to the principle of smaller near regions and larger far regions, and controlling the painting device to outline the outline of the painting objects specifically include:

[0017] Project the painting object in each area into the plane image to obtain a projected object;

[0018] According to the contour ratio corresponding to the area where the projection object is located, the contour and details of the painting object are painted, wherein the contact point range is realistically outlined, and the non-contact points are blurred in turn at different levels of different areas. The contact points are processed and the contact point indentation contour is drawn.

[0019] Furthermore, it also includes a preset clarity range value. When the level of the area is greater than or equal to the preset clarity range value, contour drawing is performed; when the level of the area is less than the preset clarity range value, contour and detail drawing is performed.

[0020] Furthermore, the distance threshold is a vertical distance value between two parallel dividing surfaces, and the range of the distance threshold is 10 mm-2000 mm.

[0021] Furthermore, the edge blending of adjacent areas includes:

[0022] The blur intensity to be expressed in different spaces is calculated according to the spatial distance and the blurring process is performed, so that the work has an objective and realistic visual effect during the drawing process.

[0023] Furthermore, the coloring of the perspective background on the completed drawing specifically includes: selecting a color according to the color of the perspective background, and coloring the entire drawing so that the drawing has a background color with a perspective effect.

[0024] A reverse perspective painting device, characterized in that it comprises: a division processing module, an outline painting module, a coloring module, a modification module, and a background painting module;

[0025] The division processing module is used to select one or more contact points of the painting object, and divide the painting object into regions based on the three-dimensional spatial position of the painting object and the distance from the transparent object with the contact points as the center;

[0026] The outline drawing module is used to lay out the drawing objects in the picture according to the principle of small near and large far, outlining the outline and details of the drawing objects;

[0027] The coloring module is used to switch the drawing tools and color the outline of the drawing object. The clarity of the area is gradually reduced from the contact point to the outside according to the area division.

[0028] The modification module is used to blend the edges of adjacent areas so that the edges of the painting objects transition naturally;

[0029] The background painting module is used to color the perspective background on the completed drawing to complete the entire painting work, so that the main body of the picture is small near and large far away, and the realistic part of the picture occupies less than 10% of the entire picture.

[0030] A reverse perspective painting terminal device comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, the reverse perspective painting method is implemented.

[0031] A computer-readable storage medium includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute the above-mentioned reverse perspective drawing method.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] The present invention provides a reverse perspective painting method, device, terminal equipment and storage medium. By selecting contact points, dividing position areas and setting outline proportions for selected painting objects, and performing layout and drawing, the painting device can be controlled to perform different painting settings. After the painting is completed, the background is drawn so that the painting has a layer of background color with a perspective effect, and the painting is completed, thereby achieving a reverse perspective effect for the painting. The present invention uses the imaging principle of large objects in the distance and small objects near, so that the scenery and characters in the picture appear to have walked out of the picture directly, so that the viewer can experience the sense of the picture more intuitively and deeply, thereby giving the viewer a stronger sense of participation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the process flow of the reverse perspective drawing method of the present invention;

[0035] Figure 2The object processing principle of the reverse perspective painting method of the present invention Figure 1 ;

[0036] Figure 3 The object processing principle of the reverse perspective painting method of the present invention Figure 2 ;

[0037] Figure 4 This is a diagram showing the principle of image processing of the anti-perspective painting method of the present invention;

[0038] Figure 5 The painting image is completed by image processing using the reverse perspective painting method of the present invention;

[0039] Figure 6 It is a schematic diagram of the structure of the anti-perspective painting terminal device of the present invention. DETAILED DESCRIPTION

[0040] The present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0041] Embodiment 1

[0042] In this embodiment, mainly for the oil painting creation process, it is possible to complete an image with a reverse perspective effect, such as Figure 1 As shown, the present invention provides a reverse perspective drawing method, comprising:

[0043] S1, selecting one or more contact points of the painting object, taking the contact points as the center, and dividing the painting object into regions according to the three-dimensional spatial position of the painting object and the distance from the transparent object;

[0044] It should be noted that in the invention, the painting object can be a person or scene in the actual painting, or an image; in order to show the texture of the painting object through light and shadow, and the medium through the medium, and to express the effect of being integrated into the environment with the subject, the work of the invention captures one or more points closest to the viewer in the entire dynamic link of the subject, and places it in the position closest to the viewer's visual effect in the picture, so that the subject of the picture is small near and large far away, and in the visual perception of the picture, there is a medium between the subject and the viewer, and the medium has a blurring effect on the description of the subject; the picture has a sense of substitution and movement, and can generate spatial interaction with the viewer; it achieves realism at the closest point and true color. At a farther distance, the space effect is outlined by color and ambient color according to the distance and clarity.

[0045] like Figure 2 , 3 As shown in the figure, the specific processing process is as follows:

[0046] 1.1. Select one or more points closest to the viewer in the entire dynamic link of the painting object as contact points, and the contact points are in the same plane position, which is defined as the initial surface;

[0047] 1.2. Centered on the contact point or initial surface;

[0048] 1.3. According to the spatial distance of the painting object, the painting object is placed in an inverted cone structure;

[0049] 1.4. Set the distance threshold and division surface. Each distance threshold is used to divide the inverted cone into multiple areas, and each area corresponds to a level.

[0050] It should be noted that the area can be divided into regular or irregular ranges according to the painting object, such as a regular inverted isosceles vertebra, or an irregular ring-shaped structure.

[0051] For example, a distance threshold and a division plane are set, and the inverted isosceles vertebra is divided into n regions at each distance threshold; n is a positive integer, and the division plane is parallel to the initial plane.

[0052] The distance threshold is the vertical distance between two parallel dividing planes, and the range of the distance threshold is 10mm-2000mm. Preferably, the selection of the threshold can be set according to the ratio of the drawn image. For example, a threshold of 15mm can be selected for character drawing, and an area is divided every 15mm; a threshold of 1500mm can be selected for landscape drawing, and an area is divided every 1500mm.

[0053] For image processing, it is more convenient. You only need to process the image, including:

[0054] 1.5. Select one or more contact points in the image and blur the image with the contact points as the center;

[0055] 1.6. Divide the blurred image into annular regions on a plane according to the distance between the contact points; divide the regions into n regions; n is a positive integer, and the dividing plane is parallel to the initial plane; Figure 4 shown.

[0056] It should be noted that in order to make the drawn picture more realistic and in line with the reverse perspective effect, when processing the contact points, the contact points can be processed and the contact points can be drawn with indentation contours to make the image more realistic.

[0057] S2, arranging the painting objects in the picture according to the principle of smaller near and larger far regions, and controlling the painting device to outline the outline and details of the painting objects;

[0058] Specifically include:

[0059] 2.1. Project the painting object in each area into the plane image to obtain the projection object;

[0060] 2.2. According to the contour ratio corresponding to the area where the projection object is located, the contour and details of the painting object are painted, wherein the contact point range is realistically outlined, and the non-contact points are blurred in turn at different levels of different areas. The contact points are processed and the contact point indentation contour is drawn.

[0061] In addition, the present invention also includes a preset clarity range value. When the level of the region is greater than or equal to the preset clarity range value, contour drawing is performed; when the level of the region is less than the preset clarity range value, contour and detail drawing is performed. Exemplarily, when the region n is greater than k, only contour drawing is performed on the k region and the region greater than k; k is the preset clarity range, and k is a positive integer. Exemplarily, when k is 3, the third region, the fourth region, the fifth region, etc. will no longer be drawn in detail, and only the outline of the shape needs to be drawn, so that the image presents a presentation effect of small near and large far.

[0062] When painting an image, the steps include:

[0063] 2.3. Perform grayscale processing on the blurred image to obtain a grayscale processed image;

[0064] 2.4. According to the divided areas, edge detection is performed on the image subject in the grayscale processed image to obtain the image subject contour line; wherein the image subject contour line includes a plurality of inflection points;

[0065] 2.5. Taking each of the inflection points as a segmentation point, the image main body contour line is divided into a plurality of segments to obtain a plurality of sub-contour lines, and a plurality of delineation paths are obtained according to the plurality of sub-contour lines;

[0066] 2.6. According to the line thickness value of each of the drawing paths, set the drawing method of each of the drawing paths; wherein the drawing method includes: the height of the brush being pressed down or the number of times the line is drawn.

[0067] 2.7. Get the outline and detail of the painting.

[0068] What needs to be explained is the method of outlining the painting object: the contact point range is realistic, and the non-contact points are blurred in different levels of different areas.

[0069] S3, switch the painting tool, color the outline of the painting object, and divide it into regions so that the clarity of the area outside the contact point is reduced synchronously;

[0070] In this step, the outline and details are colored according to the area. It should be noted that the edge of the outline needs to leave a range for blending, and no solid painting is required. In addition, it is necessary to select colors according to the distance position corresponding to the painting object, so that the colors of different areas are gradient colors, and finally the effect of gradually reducing the clarity of the area is presented.

[0071] S4, performing edge blending on adjacent areas to make the edges of the painting objects transition naturally;

[0072] The blur intensity of different spaces is calculated based on the spatial distance, and objective and realistic visual effects are achieved during the creation process. The painting is transitioned and rendered using different painting tools. According to the painting style, appropriate painting tools are selected to render and transition the edges of the image, making the edges of the painting transition naturally and the painting smoother.

[0073] S5. Color the perspective background on the finished drawing to complete the entire painting, making the main body of the picture small near and large far, and the realistic part of the picture occupies less than 10% of the entire picture.

[0074] like Figure 5 As shown, according to the color of the perspective background, a color is selected and the entire drawing is colored so that the drawing has a background color with a perspective effect. When selecting the color of the perspective background, a pure and clear color is selected according to the color of the perspective object.

[0075] In order to better display the final three-dimensional effect of the painting, the painting in this embodiment does not need to be framed.

[0076] In the present invention, the painting work can be completed by a painting device, such as a painting robot, etc. The painting work has the following characteristics:

[0077] 1. The realistic part of the picture accounts for less than 10% of the whole picture;

[0078] 2. The subject of the picture is small near and large far away;

[0079] 3. In the visual experience of the picture, there is a medium between the subject and the viewer, and the medium has a blurring effect on the description of the subject;

[0080] 4. The picture has a sense of immersion and movement, which can generate spatial interaction with the audience;

[0081] 5. The closest part is realistic and the colors are true. The farther away, the colors and ambient colors are used according to the distance and clarity to outline the spatial effect.

[0082] Embodiment 2

[0083] like Figure 6As shown, the present invention provides a reverse perspective drawing device, comprising: a division processing module 1, an outline drawing module 2, a coloring module 3, a modification module 4, and a background drawing module 5;

[0084] The division processing module 1 is used to select one or more contact points of the painting object, and divide the painting object into regions based on the three-dimensional spatial position of the painting object and the distance from the transparent object with the contact points as the center;

[0085] Outline drawing module 2, used to arrange the drawing object in the picture according to the principle of small near and large far, and outline the outline and details of the drawing object;

[0086] Coloring module 3, used to switch the drawing tools, color the outline of the drawing object, and divide the area so that the clarity of the area outside the contact point is gradually reduced;

[0087] Modification module 4, used for performing edge blending on adjacent areas so that the edges of the painting object have a natural transition;

[0088] The background painting module 5 is used to color the perspective background on the completed drawing to complete the entire painting work, so that the main body of the picture is small near and large far, and the realistic part of the picture occupies less than 10% of the entire picture.

[0089] Specifically, the division processing module 1 is specifically used to select one or more points closest to the viewer in the entire dynamic link of the painting object as contact points, and the contact points are in the same plane position, which is defined as the initial surface; with the contact point or the initial surface as the center; according to the spatial distance of the painting object, the painting object is set in an inverted cone structure; a distance threshold and a division surface are set, and the inverted cone is divided into multiple areas at each distance threshold, and each area corresponds to a level.

[0090] The contour drawing module 2 is specifically used to project the drawing object of each area into the plane image to obtain the projection object; according to the contour ratio corresponding to the area where the projection object is located, the contour and details of the drawing object are drawn, wherein the contact point range is realistically outlined, and the non-contact points are enhanced and blurred in turn at the level of different areas, and the contact points are processed to draw the contact point indentation contour.

[0091] It also includes a preset clear range value. When the level of the area is greater than or equal to the preset clear range value, contour drawing is performed; when the level of the area is less than the preset clear range value, contour and detail drawing is performed. The distance threshold is the vertical distance value between two parallel division surfaces, and the range of the distance threshold is 10mm-2000mm.

[0092] Coloring module 3 is specifically used for the contact point range color to be mainly realistic, the non-contact point range color contrast is relatively weak, and the ambient color is gradually added.

[0093] The modification module 4 is specifically used to calculate the blur intensity to be expressed in different spaces according to the spatial distance and perform the blending process, so that the work has an objective and real visual effect during the drawing process.

[0094] The background painting module 5 is specifically used to select a color according to the color of the perspective background and paint the entire drawing so that the drawing has a background color with a perspective effect.

[0095] Embodiment 3

[0096] The present invention also provides a reverse perspective painting terminal device, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor implements the reverse perspective painting method in the above-mentioned embodiment 1 when executing the computer program.

[0097] A computer-readable storage medium, characterized in that it includes a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute the reverse perspective drawing method in the above-mentioned embodiment 1.

[0098] It should be noted that the device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, in the accompanying drawings of the device embodiments provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines. A person of ordinary skill in the art may understand and implement it without paying any creative effort.

[0099] It is obvious to those skilled in the art that the above-mentioned specific examples are only preferred embodiments of the present invention. Therefore, the improvements and changes that may be made by those skilled in the art to certain parts of the present invention still embody the principles of the present invention and achieve the purpose of the present invention, and all belong to the scope of protection of the present invention.

Claims

1. A reverse perspective painting method, characterized in that: include: 1) Select one or more contact points of the painting object, and divide the painting object into regions based on the three-dimensional spatial position of the painting object and the distance from the transparent object, taking the contact points as the center; 2) Arrange the painting objects in the picture according to the principle of small near and large far, and outline the outline and details of the painting objects; 3) Switch the drawing tool, color the outline of the drawing object, and divide it into regions so that the clarity of the area gradually decreases from the contact point to the outside. 4) Blending the edges of adjacent areas to make the edges of the painting objects transition naturally; 5) Color the perspective background on the finished drawing to complete the entire painting, so that the main body of the painting is small near and large far away, and the realistic part of the painting occupies less than 10% of the entire painting; The step of selecting one or more contact points of the painting object and dividing the painting object into regions based on the contact points and the three-dimensional spatial position of the painting object and the distance from the transparent object specifically includes: Select one or more points closest to the viewer in the entire dynamic link of the painting object as contact points, and the contact points are in the same plane position, which is defined as the initial surface; Centered on the contact point or initial surface; According to the spatial distance of the painting object, the painting object is placed in an inverted cone structure; Set the distance threshold and division surface. Each distance threshold is used to divide the inverted cone into multiple areas, and each area corresponds to a level. The edge blending of adjacent areas comprises: The blur intensity to be expressed in different spaces is calculated according to the spatial distance and then smudged, so that the work has an objective and realistic visual effect during the drawing process.

2. The reverse perspective drawing method according to claim 1, characterized in that: The method of arranging the painting objects in the picture according to the principle of smaller near regions and larger far regions, and controlling the painting device to outline the outline of the painting objects specifically includes: Project the painting object in each area into the plane image to obtain a projected object; According to the contour ratio corresponding to the area where the projection object is located, the contour and details of the painting object are painted, wherein the contact point range is realistically outlined, and the non-contact points are blurred in turn at different levels of different areas. The contact points are processed and the contact point indentation contour is drawn.

3. The reverse perspective drawing method according to claim 2, characterized in that: It also includes a preset clarity range value. When the level of the area is greater than or equal to the preset clarity range value, contour painting is performed; when the level of the area is less than the preset clarity range value, contour and detail painting is performed.

4. The reverse perspective drawing method according to claim 1 or 2, characterized in that: The distance threshold is a vertical distance value between two parallel dividing surfaces, and the range of the distance threshold is 10 mm-2000 mm.

5. The reverse perspective drawing method according to claim 1, characterized in that: The step of coloring the perspective background on the completed drawing specifically includes: selecting a color according to the color of the perspective background, and coloring the entire drawing so that the drawing has a background color with a perspective effect.

6. A reverse perspective painting device, characterized in that: include: Divide into processing module, outline painting module, coloring module, retouching module, background painting module; The division processing module is used to select one or more contact points of the painting object, and divide the painting object into regions based on the three-dimensional spatial position of the painting object and the distance from the transparent object with the contact points as the center; The outline drawing module is used to lay out the drawing objects in the picture according to the principle of small near and large far, outlining the outline and details of the drawing objects; The coloring module is used to switch the drawing tools and color the outline of the drawing object. The clarity of the area is gradually reduced from the contact point to the outside according to the area division. The modification module is used to blend the edges of adjacent areas so that the edges of the painting objects transition naturally; Background painting module, used to color the perspective background on the finished drawing, completing the entire painting work, making the main body of the picture small near and large far, and the realistic part of the picture occupies less than 10% of the whole picture; The step of selecting one or more contact points of the painting object and dividing the painting object into regions based on the contact points and the three-dimensional spatial position of the painting object and the distance from the transparent object specifically includes: Select one or more points closest to the viewer in the entire dynamic link of the painting object as contact points, and the contact points are in the same plane position, which is defined as the initial surface; Centered on the contact point or initial surface; According to the spatial distance of the painting object, the painting object is placed in an inverted cone structure; Set the distance threshold and division surface. Each distance threshold is used to divide the inverted cone into multiple areas, and each area corresponds to a level. The edge blending of adjacent areas comprises: The blur intensity to be expressed in different spaces is calculated according to the spatial distance and then smudged, so that the work has an objective and realistic visual effect during the drawing process.

7. A reverse perspective painting terminal device, characterized in that: The invention comprises a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, wherein the processor implements the reverse perspective painting method according to any one of claims 1 to 5 when executing the computer program.

8. A computer-readable storage medium, characterized in that: The invention comprises a stored computer program, wherein when the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute the reverse perspective painting method as claimed in any one of claims 1 to 5.

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