Projection processing methods

Abstract

This application provides a projection processing method, which includes: spraying a coating of a preset format onto a projection surface; projecting light onto the projection surface using a light-emitting array to display a projected image on the projection surface; and causing the coating to diffusely reflect and emit light according to the preset format on the projection surface. The projected image corresponding to the light-emitting array is generated using a preset encoding method, and the preset format is obtained based on different sub-pixel codes in different encoding methods of the projected image. The embodiments of this specification use a coating of a preset format onto the projection surface, combined with the encoding method of the projected image to excite diffuse reflection and "self-emission" of the coating, eliminating the need for additional optical structures. This solves the problem of the projection process being easily affected by ambient light, achieving clear display of the projected image on the projection surface and improving the display effect of the projected image.

Description

Technical Field

[0001] This application relates to the field of projection display technology, specifically to a projection processing method. Background Technology

[0002] Video projection is widely used in electronic presentations, homes, and cinemas. However, video projection has high requirements for ambient lighting.

[0003] While various optical structures are used as projection surfaces, their application is limited, and the use of additional optical structures can cause inconvenience during projection, resulting in low projection efficiency and poor performance. Furthermore, to avoid the influence of ambient light, current technology widely employs LED display walls to assist in projection. However, LED display walls not only cause light pollution in the indoor environment, leading to glare and other adverse reactions for users, but also affect the quality of the projected image.

[0004] Therefore, a new projection processing solution is needed. Summary of the Invention

[0005] In view of this, embodiments of this specification provide a projection processing method applied to the image projection presentation process.

[0006] The embodiments in this specification provide the following technical solutions:

[0007] This specification provides an embodiment of a projection processing method, the projection processing method comprising:

[0008] A pre-formatted coating is sprayed onto the projected surface;

[0009] The light-emitting array projects light onto the projected surface to display the projected image on the projected surface. According to a preset format, the sprayed material generates diffuse reflection and excitation light on the projected surface. The projected image corresponding to the light-emitting array is generated using a preset encoding method, and the preset format is obtained based on different sub-pixel encodings in different encoding methods of the projected image.

[0010] This specification also provides an embodiment of a projected object, which is then processed using the projection method described in any of the technical solutions in this specification's embodiments.

[0011] This specification also provides a light-emitting array that applies the projection processing method described in any of the technical solutions in the embodiments of this specification.

[0012] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least:

[0013] The projected surface is coated with a pre-formatted coating. Combined with the encoding method of the projected image, the coating is excited to diffuse reflection and "self-emission," thus solving the problem that the projection process is easily affected by ambient light. This not only achieves clear display of the projected image on the projected surface, but also improves the brightness, contrast, and color of the projected image. Its image quality and display effect surpass the projection effect of existing technologies using LED display walls and specific screens. It avoids light pollution in the environment and also achieves a clear projection effect on any material surface of the projected object, overcoming the influence of bright environment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a typical scene of image projection display in this application;

[0016] Figure 2 This is a schematic diagram of the surface of the object to be projected in this application;

[0017] Figure 3 This is a schematic diagram of the image pre-encoding method combined with the spraying mode in this application;

[0018] Figure 4 This is a schematic diagram of the preset encoding method for the projected image in this application;

[0019] Figure 5 This is a schematic diagram of the field-sequence image coding and spatiotemporal combination projection coding that conforms to the color mixing principle in this application;

[0020] Figure 6 This is a flowchart of a projection processing method in this application. Detailed Implementation

[0021] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0022] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0024] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0025] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0026] Existing projection display technologies are susceptible to the effects of ambient light, such as bright lighting conditions, resulting in poor image quality. In brightly lit environments like meeting rooms, spacious halls, public presentations, or advertising walls, image quality suffers, leading to a poor projection experience and overall user experience. Even with screens employing special optical structures, current technologies suffer from limited performance, high cost, and inconvenience, limiting their application and making operation cumbersome. Furthermore, while existing technologies utilize LED display walls, these walls can cause ambient light pollution, leading to glare and other adverse effects, and the image quality remains unsatisfactory.

[0027] Based on this, the embodiments of this specification propose a projection processing scheme: such as Figure 1 As shown, a pre-formatted coating (not shown) is sprayed onto the surface 40 of the object to be projected 10. This coating may include a light-emitting or light-absorbing material. The light-emitting array 20 then emits light of a corresponding wavelength to display the projected image 30 on the surface 40 of the object. The projected image corresponding to the light-emitting array is generated using a pre-defined encoding method. The pre-defined format corresponding to the coating is obtained based on different sub-pixel codes in different encoding methods of the projected image. This pre-defined format causes the coating to generate diffuse reflection and excitation light on the surface of the object. The excitation light includes the coating sprayed onto the surface of the object, which, when illuminated by the light-emitting array, forms a self-illuminating phenomenon according to the pre-defined format to compensate for the insufficient diffuse reflection.

[0028] A pre-formatted coating is sprayed onto the projection surface. Combined with the encoding method of the projected image, this excites diffuse reflection and "self-emission" of the coating, thus solving the problem of the projection process being easily affected by ambient light. This not only achieves clear display of the projected image on the projection surface, improving the brightness, contrast, and color of the projected image, but also surpasses the projection effect of existing technologies using LED display walls and specific screens. It avoids light pollution and achieves clear projection even on any material surface, overcoming the influence of bright environments. The projection process described in this specification does not require a specially structured screen or any additional optical components. Therefore, it not only improves the display effect and convenience of the projected image but also has a wide range of application value and scope, such as in education, conference venues, public advertising scenarios, vehicle-mounted displays, and commercial scenarios. The technical solutions provided by various embodiments of this application are described below with reference to the accompanying drawings.

[0029] like Figure 6 As shown, the projection processing method of this embodiment includes: step S610, spraying a pre-formatted coating onto the surface of the object to be projected. Step S620, a light-emitting array projects light onto the surface of the object to display a projected image, and the coating generates diffuse reflection and excitation light on the surface of the object according to the pre-formatted method; wherein, the projected image corresponding to the light-emitting array is generated using a pre-formatted encoding method, and the pre-formatted method is obtained according to different sub-pixel codes in different encoding methods of the projected image. In some embodiments, the light-emitting array includes a projection device, including but not limited to a TFT-LCD projector, an LCOS projector, a DLP projector, a MEMS scanning projector, etc. Steps S610 and S620 are performed sequentially, or step S620 can be performed before step S610, or they can be performed interchangeably, depending on the specific circumstances.

[0030] Combination Figure 1 A pre-formatted coating is sprayed onto the surface of the projected object. This coating is not simply applied to the surface of the object; the pre-formatted coating is obtained based on the encoding method of different sub-pixels in the projected image. For example... Figure 2 The example projected object surface pixels, the sprayed material corresponding to the preset format, realize the appropriate spraying of the sprayed material on the surface of the projected object. In some embodiments, the surface of the projected object can be partially or completely sprayed, specifically adapted to the details of the projected image. The projected image can be generated using a preset encoding method according to its image detail quality. However, the preset encoding method of the projected image is different from encoding based entirely on color combination. Instead, it is an encoding that combines color with spatiotemporal interaction based on color mixing principles and field order output encoding. When the light-emitting array projects light onto the surface of the projected object, the sprayed material generates diffuse reflection and excitation light on the surface of the projected object according to the preset format mapped to the projected image. This not only overcomes the influence of the light environment compared to the prior art, such as bright environments, and greatly compensates for the lack of diffuse reflection light, but also improves the contrast and color of the projected image, achieving high-definition image display. Specifically, the projected image corresponding to the light-emitting array is generated using a preset encoding method, including: each frame sub-pixel in the projected image is re-encoded according to the light mixing principle to re-encode the color mode content (such as RGB content) and field order. Sub-pixels represent the division of each frame's pixels into multiple sub-pixels. These sub-pixels, through a preset encoding method, are projected by an array of light-emitting particles. This not only improves the image quality displayed on the surface of the projected object but also, combined with a preset format corresponding to the coating on the object, overcomes the influence of bright ambient light, causing the coating to produce diffuse reflection and "self-emission." This enhances the brightness, contrast, and color of the projected image, resulting in a display quality exceeding that of existing technologies using LED display walls and specific screens. It eliminates the need for additional optical structures, avoids light pollution, and achieves clear projection even on any material surface. Within each frame, sub-pixels can select and encode color modes based on the details of the projected image. Encoding can also be based on field-sequence display technology or a combination of both, resulting in vibrant colors and higher brightness and contrast in the stretched video image. This resists ambient light during projection, causing the coating to produce diffuse reflection and excitation light, thus achieving high-definition image display. Color modes can include RGB and Lab color modes.

[0031] In some embodiments, the projected image corresponding to the light-emitting array is generated using a preset encoding method, including: each sub-pixel in each frame of the projected image is encoded using at least one color; or, some sub-pixels in each frame of the projected image are encoded using the color corresponding to the light wave projected by the light-emitting array; or, corresponding sub-pixels in adjacent frames of the projected image are encoded using complementary color; or, each frame of the projected image is encoded using the spatiotemporal order of sub-pixels based on field order and interpolation.

[0032] Compared to existing field order encoding and display technologies, the embodiments in this specification can adaptively encode the content of the color mode and the field order of each sub-pixel in each frame of the projected image to adapt to the preset format of the spray painting and improve the display effect of the projected image.

[0033] like Figure 4 The color modes in the example field order format include R (red), G (green), B (blue), and W (white). These color modes are for illustrative purposes only, and specific limitations can be imposed based on actual conditions. In existing field order coding techniques, each frame's sub-pixels are composed of RGB values. However, in this embodiment, each sub-pixel in each frame can be encoded using at least one color. In some embodiments, each sub-pixel can also be encoded using a combination of two or even three colors, which will not be elaborated here. The implementation principle and process are similar to those for a single color. In some embodiments, adjacent sub-pixels can have the same or different colors.

[0034] Alternatively, some or all of the sub-pixels in each frame of the projected image can be encoded using the color corresponding to the light wave projected by the luminous array. See, for example... Figure 4 The projected image contains a portion of pixels in each frame, such as... Figure 4 In the fourth field 21, the image output uses UV light from the light-emitting array instead of white light. That is, in this frame of the projected image, the first three fields are encoded using color mode content, which is then combined with the color of the light wave in the fourth field to achieve encoding. This compensates for the decrease in color saturation caused by ambient light during projection, resulting in a superior display effect that enhances the contrast, brightness, and color of the projected image. In some embodiments, the colors corresponding to the light waves projected by the light-emitting array include, but are not limited to, UV light, infrared light, green light, and blue light.

[0035] Alternatively, corresponding sub-pixels in adjacent frames of the projected image can be encoded with complementary colors. Specifically, by using frame interpolation field order display technology, corresponding sub-pixels in adjacent frames are encoded with complementary colors to generate the projected image. This can enhance the projected image, making it more vibrant and bright, and thus improve the contrast of the projected image during projection, while also resisting the influence of ambient light.

[0036] Alternatively, each frame of the projected image can be encoded using field order and interpolated subpixel spatiotemporal order coding. For example... Figure 3(b) The projected image employs interleaved video encoding and sequence, with two sub-pixels used for interleaved encoding to enhance the color and contrast of the projected image. This allows for simultaneous display of diffuse reflection and excitation light from the sprayed material on the surface of the projected object during projection, overcoming the influence of ambient light and improving the quality of the projected image, resulting in a clearer and more vibrant picture. Specifically, the spraying mode can be determined from two sub-pixels, 41 and 42. Only one sub-pixel can be sprayed, or both sub-pixels can be sprayed. When spraying two sub-pixels, different or the same material can be sprayed, as long as it corresponds one-to-one with the video encoding signal of the projector's output light, thus enhancing the projected image signal and displaying a complete picture.

[0037] For example Figure 5 In the example, four sub-pixels (22, 23, 24, and 25) in one frame of the projected image are encoded using the preset encoding method described in the above embodiments. Based on the principle of light mixing, the content of the color mode of each sub-pixel, such as RGB content, can be selected and combined for encoding. Alternatively, the output light can be defined by using the color corresponding to the light wave projected by the light-emitting array, and the sub-pixel color mode, field order interpolation order encoding, and output light definition encoding can be combined to output the projected image. Therefore, the encoding of each sub-pixel in the projected image can be adapted to the spraying mode of the sprayed material, such as... Figure 5 The image encoding method, combined with the material of the sprayed object, is adapted to the projection process. It can overcome the influence of ambient light and cause diffuse reflection and excitation light on the surface of the object being projected. This makes the stretched video image of the projected image more vivid and has higher brightness and contrast, thereby improving the projection display effect of the projected image.

[0038] In some embodiments, the aforementioned preset encoding method can be used to generate the projected image, depending on the different encoding mechanisms of various projectors. The preset encoding method of the projected image can affect the sprayed material of the preset format, thereby causing the sprayed material to produce diffuse reflection and excitation light on the surface of the projected object according to the preset format.

[0039] In some embodiments, the preset format is obtained based on different sub-pixel codes in different encoding methods of the projected image, including at least one of the following: spraying the coating material corresponding to part or all of the preset format according to each sub-pixel code of the projected image; or, spraying the coating material with the same material according to each sub-pixel code of the projected image; or, spraying the coating material with different materials according to each sub-pixel code of the projected image. The preset format corresponding to the coating material is the spraying mode corresponding to the coating material, which also includes a spraying area with a regular shape such as a rectangle or circle, or an irregular shape.

[0040] See Figure 3 Example spraying patterns, such as Figure 3(a) The spraying mode of the sprayed object is based on the field sequence display of the projected image, using, for example... Figure 4 If each frame is encoded using at least one color, then the spraying format corresponding to the sprayed object is to perform full spraying. For example... Figure 3 (b) The spraying mode can generate projected images based on the interpolation encoding method used by all projectors on the market, and can be used in applications such as... Figure 3 (b) Either sub-pixels 41 and 42 can be sprayed, or both sub-pixels can be sprayed. In some embodiments, when both sub-pixels 41 and 42 are sprayed, the materials of the sprayed objects in the spraying patterns mapped to sub-pixels 41 and 42 can be the same or different. Regardless of whether the materials of the sprayed objects are the same, as long as the spraying pattern corresponds one-to-one with the video encoding signal of the projected image, the image quality of the projected image can be enhanced.

[0041] For example Figure 3 (c) It can more strongly increase the brightness and color vibrancy. Figure 3 (c) Example: four subpixels 43, 44, 45, and 46. Two to four subpixels can be sprayed with the same or different materials. A DLP projector can be used to achieve the spraying of a preset format of material.

[0042] In some embodiments, the projection processing method further includes enhancing the edge content and image content of the projected image using a light-emitting array to obtain an enhanced projected image; and controlling the output of light of different wavelengths corresponding to different colors based on the enhanced projected image.

[0043] Specifically, based on the image quality characteristic that image details determine image quality, and to enhance brightness and color during the image processing, a high-order stretching and low-order limiting method using the gamma curve is employed to process the image quality, resulting in an enhanced projected image. In some embodiments, setting an ambient light limit during image quality processing can further enhance image contrast, brightness, and color vibrancy. The specific algorithm is as follows:

[0044] if(Hgram(k)>(num / 128)&Hgram_edge(k)<(num_edge / 256))

[0045] Hgram_edge(k)=T*num_edge / 256;

[0046] In the above formula, Hgram is the histogram statistics of the original image, Hgram_edge is the histogram statistics of the edge image, num is the total number of pixels in the original image, Hgram_edge is the total number of pixels in the edge image, k is a certain gray level, and T is the ambient light threshold.

[0047] In some embodiments, to enhance the contrast, brightness, and color of the image, the light-emitting array controls the output of light of different wavelengths corresponding to different colors, based on the enhanced projected image.

[0048] For example, when used in TFT-LCD or Lcos projectors, blue light, UV light, or infrared light can be mixed simultaneously when projecting green or red light. Depending on the spraying mode of all the sprayed materials, green or red light can be activated to compensate for the decrease in color saturation caused by ambient light, thereby achieving a high-quality image effect that enhances the contrast, brightness, and color display of the projected image.

[0049] Similarly, the light-emitting array can control the output of light of different wavelengths corresponding to different colors, depending on the projected image.

[0050] In some embodiments, the projection processing method further includes projecting light of different colors onto a light-emitting array according to a pre-defined format of sprayed material. Figure 1 The light-emitting array, such as projector 20, can project blue light (or ultraviolet, infrared, or mixed light), green light, and red light, depending on the spraying pattern of the coating on the surface 40 of the projected object. The projected light carries video image information of the projected image and causes diffuse reflection and excitation light on the surface of the projected object according to the spraying pattern. Similarly, the light-emitting array projects different colors of light for partial spraying, spraying of the same material, and spraying of different materials, as illustrated above.

[0051] In some embodiments, the coating may include a luminescent or light-absorbing material, wherein the luminescent material includes, but is not limited to, phosphors, quantum dots, or various rare earth elements.

[0052] In some embodiments, the projection surface is disposed on the surface of the object to be projected. The object to be projected may include an object made of the same material, an object with an added film, or an object made of spliced ​​different materials. The surface of the object to be projected may be a plane or a curved surface.

[0053] Specifically, the coating material sprayed onto the physical surface of the projected object includes luminescent materials, such as phosphors, quantum dots, and various rare earth elements. The material of the luminescent material, as described in the above embodiments, can be selected according to the encoding method of the projected image and the required image quality.

[0054] The object to be projected can include a regular projection screen, a wall, plastic sheets, various glass sheets, various plastic films, etc., or a larger object composed of various materials. The object can be a building, bridge, ground, car glass, car body, etc. The object can also be made of a specific material or have a specific surface structure. In some embodiments, a film is sprayed or affixed to the surface of the object to be projected, and the image is projected and displayed on the film on the surface of the object during the projection process.

[0055] In some embodiments, if the object to be projected is transparent, such as glass, a light-absorbing material can be applied, and the projection processing procedure of the embodiments in this specification can be achieved using the light-absorbing material. The projection processing method of the embodiments in this specification can overcome the influence of bright environments to achieve a clear projection effect on the surface of any object material.

[0056] This embodiment of the specification achieves selective excitation of light from the sprayed material of a preset format on the projected surface by combining the encoding method of the projected image with the excitation of diffuse reflection and "self-emission" of the sprayed material. This allows for selective excitation of light from the sprayed material on the surface of the projected object, achieving either full or partial excitation, depending on the encoding method of the sub-pixels of the projected image and the spraying pattern of the sprayed material. Based on the preset format sprayed material settings on the entire surface of the projected object, this embodiment of the specification can still achieve diffuse reflection and excitation light display effects in the sprayed areas of the projected object surface where the projected image is not displayed. Diffuse reflection and excitation light effects can also be achieved by spraying only a portion of the sprayed material on the surface of the projected object. This not only solves the problem of the projection process being easily affected by ambient light, but also achieves clear display of the projected image on the projected surface, improving the brightness, contrast, and color of the projected image. Its image quality surpasses the projection effects of existing technologies using LED display walls and specific screens, avoids environmental light pollution, and achieves clear projection effects on any material surface of the projected object, overcoming the influence of light.

[0057] In this specification, similar or identical parts among the various embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the product embodiments described later are relatively simple in description since they correspond to the methods, and relevant parts can be referred to the descriptions in the system embodiments.

[0058] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A projection processing method characterized by, The projection processing method comprises: Spraying a preset format of spraying material on the projected surface; The light-emitting array projects light onto the projected surface to display a projection image on the projected surface, and the spraying material produces diffuse reflection and excitation light on the projected surface according to the preset format; wherein the projection image corresponding to the light-emitting array is generated in a preset encoding mode, and the preset format is obtained according to different sub-pixel encodings in different encoding modes of the projection image; The projection image corresponding to the light-emitting array is generated in a preset encoding mode, which comprises re-encoding the content of the color mode and the field sequence order of each frame of sub-pixels according to the light mixing principle; Each sub-pixel in each frame of the projection image is encoded in at least one color; Or, part or all of the sub-pixels in each frame of the projection image are encoded in a color corresponding to the light wave projected by the light-emitting array, Or, the corresponding sub-pixels of adjacent frames in the projection image are encoded by complementary colors; Or, each frame of the projection image is encoded by the sub-pixel space-time order of field sequence and insertion column; The method further comprises enhancing the edge content and image content of the projection image by the light-emitting array to obtain an enhanced projection image; wherein the ambient light limit value is set in the image quality processing process to enhance the contrast, brightness and vividness of the image; According to the enhanced projection image, the light-emitting array controls the output of light of different wavelengths corresponding to different colors.

2. The projection processing method according to claim 1, characterized by, The preset format is obtained according to different sub-pixel encodings in different encoding modes of the projection image, which comprises at least one of the following: According to the encoding of each sub-pixel of the projection image, part or all of the spraying material corresponding to the preset format is sprayed; Or, according to the encoding of each sub-pixel of the projection image, spraying is performed by using spraying material of the same material; Or, according to the encoding of each sub-pixel of the projection image, spraying is performed by using spraying material of different materials.

3. The projection processing method according to claim 1, characterized by, The projection processing method further comprises: according to the spraying material of the preset format, the light-emitting array projects light of different colors.

4. The projection processing method according to claim 1, characterized by, The spraying material comprises a light-emitting material or a light-absorbing material; the light-emitting material comprises at least one of the following: fluorescent powder, quantum dots or various rare earths.

5. The projection processing method according to any one of claims 1-4, wherein, The projected surface comprises a projected object surface, and the projected object comprises an object made of the same material, an object with an added film or an object made of different materials; the projected object surface comprises a plane or a curved surface.

6. A projected object, characterized by The projection processing method according to any one of claims 1-5 is applied.

7. A light emitting array, comprising: The projection processing method according to any one of claims 1-5 is applied.

Images