Symmetrical narrow-band spectral image driven multi-primary color display method and device

Abstract

The application discloses a kind of symmetric narrow-band spectral image driven multi-primary color display method and device, it is related to color image display technical field, method includes: based on the spectral reflectivity of target to be photographed calculation three stimulus value;Based on the spectral transmittance of any channel in the narrow-band spectral camera to be used, the spectral emission power of corresponding primary color channel in the multi-primary color display screen to be used and the spectral reflectivity of target to be photographed, the three stimulus value of color output by the multi-primary color display screen to be used is calculated;According to the three stimulus value of target to be photographed and the three stimulus value of color output by the multi-primary color display screen to be used, color difference data is calculated;Based on color difference data, the center wavelength and bandwidth of any channel in the narrow-band spectral camera to be used are adjusted;Image shooting is carried out to target to be photographed by the adjusted narrow-band spectral camera to be used, and the image obtained by shooting is used as the driving image of the multi-primary color display screen to be used, to obtain target color display image.The application improves the accuracy of color reproduction of color target scene.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of color image display, in particular to a multi-primary color display method and device driven by symmetrical narrowband spectral images. BACKGROUND

[0002] Traditional color image display systems usually use three primary colors of red, green and blue to realize color reproduction. With the increasing demand for color reproduction quality of display systems, multi-primary color display technology has also gradually developed. Multi-primary color display systems usually use more than four primary colors to realize a wider range of color gamut display. The technical approaches of existing multi-primary color display systems mainly include multi-primary color LED dot matrix display screen, multi-primary color LCD display screen, multi-primary color projector, multi-primary color OLED display screen, etc.

[0003] One of the key technologies of multi-primary color display systems is to obtain the n-channel driving image of the multi-primary color display screen, but this technology has not been well solved so far. The document "Driving image generation method of wide color gamut multi-primary color display system", Optics Journal, 2023, 43(01), introduces a method of converting traditional RGB color images into multi-primary color display system driving images, but this method has the problem of "non-uniformity of brightness distribution of each channel image", which has a negative impact on the service life of the display device. The document "Multi-primary color brightness equalization color conversion algorithm based on color gamut definition", Optics Technology, 2021, 47(03), also introduces a multi-primary color driving image generation algorithm, but it does not solve the problem of actual acquisition of multi-primary color display system driving images.

[0004] In summary, existing methods all try to indirectly obtain the driving image of the multi-primary color display system through color space conversion methods, but they all have problems in terms of driving image quality and driving image acquisition efficiency. SUMMARY

[0005] The purpose of the present application is to provide a multi-primary color display method and device driven by symmetrical narrowband spectral images, which improves the accuracy of color reproduction of color target scenes.

[0006] To achieve the above purpose, the present application provides the following solutions:

[0007] A multi-primary color display method driven by symmetrical narrowband spectral images, the method comprising:

[0008] Obtaining the center wavelength and bandwidth of any channel of the narrowband spectral camera to be used, the center wavelength and spectral bandwidth of any primary color channel of the multi-primary color display screen to be used, and the spectral reflectance of the target to be photographed; the number of channels of the narrowband spectral camera to be used is equal to the number of primary color channels of the multi-primary color display screen to be used;

[0009] calculating tristimulus values of the target object based on the spectral reflectance of the target object;

[0010] calculating spectral transmittance of any channel of the narrow-band spectral camera based on the center wavelength and bandwidth of the channel; calculating spectral emission power of any primary color channel of the multi-primary display based on the center wavelength and spectral bandwidth of the primary color channel;

[0011] calculating tristimulus values of the output color of the multi-primary display based on the spectral transmittance of any channel of the narrow-band spectral camera, the spectral emission power of the corresponding primary color channel of the multi-primary display, and the spectral reflectance of the target object;

[0012] calculating color difference data based on the tristimulus values of the target object and the tristimulus values of the output color of the multi-primary display;

[0013] adjusting the center wavelength and bandwidth of any channel of the narrow-band spectral camera based on the color difference data; the adjusted narrow-band spectral camera is used for image shooting of the target object, and the image obtained by shooting is used as a driving image of the multi-primary display to obtain a target color display image.

[0014] Optionally, calculating tristimulus values of the output color of the multi-primary display based on the spectral transmittance of any channel of the narrow-band spectral camera, the spectral emission power of the corresponding primary color channel of the multi-primary display, and the spectral reflectance of the target object, specifically includes:

[0015] calculating output values of any channel of the narrow-band spectral camera based on the spectral transmittance of the channel and the spectral reflectance of the target object;

[0016] calculating relative output spectral power of the primary color channel based on the output values of any channel of the narrow-band spectral camera and the spectral emission power of the corresponding primary color channel of the multi-primary display;

[0017] calculating tristimulus values of each primary color channel based on the relative output spectral power of each primary color channel of the multi-primary display;

[0018] summing the tristimulus values of each primary color channel of the multi-primary display to obtain tristimulus values of the output color of the multi-primary display.

[0019] Optionally, calculating color difference data based on the tristimulus values of the target object and the tristimulus values of the output color of the multi-primary display, specifically includes:

[0020] Any color block in a preset standard color card is taken as the target to be photographed;

[0021] Based on the CIE 976 L*a*b* color difference formula, a color difference sub-value is calculated according to the three stimulus values of any color block and the three stimulus values of the color to be output by the multi-primary color display screen.

[0022] According to a plurality of color difference sub-values, a maximum color difference sub-value, a minimum color difference sub-value, and a color difference average sub-value are determined; the maximum color difference sub-value, the minimum color difference sub-value, and the color difference average sub-value constitute color difference data.

[0023] Optionally, based on the color difference data, the center wavelength and the bandwidth of any channel in the narrow-band spectral camera to be used are adjusted, specifically including:

[0024] Based on the color difference data, the center wavelength and the spectral bandwidth of any primary color in the multi-primary color display screen are preliminarily adjusted, and the center wavelength and the bandwidth of any channel in the narrow-band spectral camera to be used are preliminarily adjusted according to a preset step size.

[0025] Based on the narrow-band spectral camera to be used and the multi-primary color display screen after preliminary adjustment, corresponding color difference data are calculated.

[0026] The adjustment number is increased by one, and then it is determined whether the adjustment number reaches a preset number.

[0027] If the adjustment number reaches the preset number, the adjustment is stopped, and based on the color difference data corresponding to multiple adjustments, optimal adjustment and the center wavelength and the bandwidth of any channel in the narrow-band spectral camera to be used after the optimal adjustment are determined.

[0028] If the adjustment number does not reach the preset number, the step of preliminarily adjusting the center wavelength and the spectral bandwidth of any primary color in the multi-primary color display screen and preliminarily adjusting the center wavelength and the bandwidth of any channel in the narrow-band spectral camera to be used according to a preset step size based on the color difference data is returned.

[0029] To achieve the above purpose, the present application also provides the following technical solutions:

[0030] A symmetric narrow-band spectral image driven multi-primary color display device, the device comprising an adjusting component, a driving component, and symmetrically arranged narrow-band spectral cameras and multi-primary color display screens; the number of channels in the narrow-band spectral camera is equal to the number of primary color channels in the multi-primary color display screen.

[0031] The narrow-band spectral camera is connected with the multi-primary color display screen through the driving component, and the adjusting component is connected with the narrow-band spectral camera and the multi-primary color display screen, respectively.

[0032] The narrow-band spectrum camera is used for image shooting of a target object to obtain a multi-primary color target image; the driving component is used for taking the multi-primary color target image as a driving image to make the multi-primary color display screen generate a target color display image.

[0033] The adjusting component is used for performing the symmetric narrow-band spectrum image driven multi-primary color display method.

[0034] Optionally, the number of channels in the narrow-band spectrum camera is greater than or equal to 4.

[0035] The center wavelength of the channel in the narrow-band spectrum camera is between 400 nm and 700 nm.

[0036] According to the specific embodiments provided by the present application, the following technical effects are disclosed.

[0037] The present application discloses a symmetric narrow-band spectrum image driven multi-primary color display method and device, calculates the tristimulus value of a target to be shot based on the spectral reflectance of the target to be shot; calculates the spectral transmittance of a channel based on the center wavelength and bandwidth of any channel in the narrow-band spectrum camera to be used; calculates the spectral emission power of a primary color channel based on the center wavelength and spectral bandwidth of any primary color channel in the multi-primary color display screen to be used; then calculates the tristimulus value of the output color of the multi-primary color display screen to be used based on the above spectral transmittance, spectral emission power and spectral reflectance; through the above processing of spectral data, the metamerism problem is avoided, and the color perception error problem caused by the metamerism phenomenon in the color reproduction process of the multi-primary color display system is solved. Further, the color difference data is calculated based on the tristimulus value of the target to be shot and the tristimulus value of the output color of the multi-primary color display screen to be used; the center wavelength and bandwidth of any channel in the narrow-band spectrum camera to be used are adjusted based on the color difference data, so that the data in the finally obtained narrow-band spectrum camera corresponds to the data in the multi-primary color display screen. The target object is imaged by using the adjusted narrow-band spectrum camera, and the obtained image is taken as the driving image of the multi-primary color display screen to obtain a target color display image, so as to realize the accurate reproduction of the color of the target object. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0039] Figure 1 The flowchart of the symmetric narrow-band spectrum image driven multi-primary color display method of the present application;

[0040] Figure 2 A schematic diagram of the principle of the n-primary LCD display system provided by the embodiment of the present application;

[0041] Figure 3 A schematic diagram of the principle of the 6-primary LED dot matrix display system provided by the embodiment of the present application.

[0042] Symbol explanation:

[0043] 1 - narrow-band spectral camera, 2 - multi-primary display screen. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0045] The present application provides a symmetric narrow-band spectral image driven multi-primary display method and device, directly captures and obtains multiple narrow-band spectral images of a target, and uses the images as driving images of a multi-primary display screen, and the real color image of the target is displayed on the multi-primary display screen. The present application realizes the purpose of directly, quickly and high-quality obtaining the multi-primary driving images of the target and making the multi-primary display screen reproduce the color image of the target.

[0046] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0047] Embodiment one

[0048] As shown in the figure, the present application provides a symmetric narrow-band spectral image driven multi-primary display method, comprising: Figure 1

[0049] Step 101, obtaining the center wavelength and bandwidth of any channel of the narrow-band spectral camera to be used, the center wavelength and spectral bandwidth of any primary color channel of the multi-primary display screen to be used, and the spectral reflectivity of the target to be photographed; the number of channels of the narrow-band spectral camera to be used is equal to the number of primary color channels of the multi-primary display screen to be used.

[0050] Among them, the imaging device (narrow-band spectral camera) and the display device (multi-primary display screen) correspond to each other in terms of channel parameters, including the number of spectral channels, the center wavelength of each channel, and the bandwidth of each channel. In one specific embodiment, the number of channels of the narrow-band spectral camera to be used is more than 4, preferably 6, such as Figure 2 and Figure 3 ​As shown, the center wavelengths of each channel in the narrowband spectral camera to be used are between 400 nm and 700 nm.

[0051] Step 201: Based on the spectral reflectance of the target to be photographed, calculate the tristimulus values ​​(X0, Y0, Z0) of the target to be photographed, using the following formula:

[0052]

[0053] Where S(λ) i ) represents the spectral distribution of the lighting source, and D65 can be selected; ρ(λ) i ) is the spectral reflectance of the target; It is the CIE 1931 XYZ standard observer spectral matching function; k1 is the normalization constant; wavelength λ i The wavelength range is 400nm-700nm, with a 10nm interval between two adjacent wavelengths.

[0054] Step 301: Calculate the spectral transmittance of any channel in the narrowband spectral camera to be used based on the center wavelength and bandwidth of any primary color channel in the multi-primary color display to be used; calculate the spectral emission power of any primary color channel based on the center wavelength and spectral bandwidth of any primary color channel in the multi-primary color display to be used.

[0055] The formula for calculating the spectral transmittance of the channel is expressed using a Gaussian function, specifically:

[0056]

[0057] The formula for calculating the spectral emission power of the primary color channel is expressed using a Gaussian function, specifically:

[0058]

[0059] Among them, R n (λ) represents the spectral transmittance of the channel, λ represents the wavelength, and λ1 n W represents the center wavelength of the n-channel of the narrowband spectral camera to be used. n P represents the bandwidth of the n-channel of the narrowband spectral camera to be used; n (λ) represents the spectral emission power of the primary color channel, a n and b n Both represent normalization constants, where a n It can be determined by the camera's white point, b n Determined by the white field of the LED multi-color display screen; W d λ2 represents the spectral bandwidth of the primary color channels of the multi-primary color display to be used. n This represents the center wavelength of the n-color channel of the multi-color display screen to be used.

[0060] Step 401, based on the spectral transmittance of any channel of the narrow-band spectral camera to be used, the spectral emission power of the corresponding primary color channel of the multi-primary color display screen to be used, and the spectral reflectance of the target to be photographed, the tristimulus value of the output color of the multi-primary color display screen to be used is calculated.

[0061] Step 401, specifically comprising:

[0062] (1) According to the spectral transmittance of any channel of the narrow-band spectral camera to be used, the spectral reflectance of the target to be photographed, the output value of the channel is calculated, and the calculation formula is:

[0063]

[0064] Wherein, C n represents the output value of the channel, S(λ j ) represents the spectral distribution of the illumination light source; ρ(λ j ) represents the spectral reflectance of the target to be photographed for wavelength λ j , R n (λ j ) represents the spectral transmittance of the channel for wavelength λ j , and λ j represents the wavelength of the jth.

[0065] Considering that the spectral bandwidth of a certain channel of the narrow-band camera is very small, usually less than 50nm, therefore in the calculation formula of the output value of the channel, the value range of wavelength λ j can be selected as 400nm-700nm, but the wavelength interval is 1nm, in order to optimize the calculation.

[0066] (2) According to the output value of any channel of the narrow-band spectral camera to be used and the spectral emission power of the corresponding primary color channel of the multi-primary color display screen to be used, the relative output spectral power of the primary color channel is calculated. At this time, the output value of any channel of the narrow-band spectral camera to be used is directly driven to drive the corresponding primary color channel of the multi-primary color display screen to be used, to obtain the distribution of the relative output spectral power of a certain primary color channel of the multi-primary color display screen, and the calculation formula is:

[0067] L n =C n P n (λ j ).

[0068] Wherein, L n represents the relative output spectral power of the primary color channel for wavelength λ j , C n represents the output value of the channel of the narrow-band spectral camera to be used, and P n (λ jrepresents the spectral emission power of the base color channel for wavelength λ j

[0069] (3) Based on the relative output spectral power of each base color channel in the to-be-used multi-base color display screen, the tristimulus value of each base color channel is calculated, and the calculation formula is as follows:

[0070]

[0071] Wherein, k2 is a normalization constant.

[0072] (4) The tristimulus values of each base color channel in the to-be-used multi-base color display screen are added to obtain the tristimulus value of the color output by the to-be-used multi-base color display screen, and the calculation formula is as follows:

[0073]

[0074] Wherein, k3 is a normalization constant.

[0075] Step 501, according to the tristimulus value of the to-be-shot target and the tristimulus value of the color output by the to-be-used multi-base color display screen, the color difference data is calculated.

[0076] Step 501, specifically comprising:

[0077] (1) Any color block in the preset standard color card is taken as the to-be-shot target. The preset standard color card adopts standard color card ColorChecker, which has 24 color blocks.

[0078] (2) Based on the CIE976L*a*b* color difference formula, the tristimulus value of any color block and the tristimulus value of the color output by the to-be-used multi-base color display screen are calculated to obtain a color difference sub-value.

[0079] (3) According to a plurality of color difference sub-values, the maximum color difference sub-value, the minimum color difference sub-value and the color difference average sub-value are determined; the maximum color difference sub-value, the minimum color difference sub-value and the color difference average sub-value constitute the color difference data.

[0080] Step 601, based on the color difference data, the center wavelength and bandwidth of any channel in the to-be-used narrowband spectral camera are adjusted; the adjusted to-be-used narrowband spectral camera is used for image shooting of the target object, and the image obtained by shooting is taken as the driving image of the to-be-used multi-base color display screen, so as to obtain a target color display image.

[0081] Step 601, specifically comprising:

[0082] ​(1) Based on the color difference data, the center wavelength and the spectral bandwidth of any primary color of the multi-primary color display screen are preliminarily adjusted according to a preset step size, and the center wavelength and the bandwidth of any channel of the narrowband spectral camera are preliminarily adjusted. The preset compensation is Δλ = ±1 nm and ΔW = ±1 nm.

[0083] (2) Based on the narrowband spectral camera and the multi-primary color display screen after the preliminary adjustment, corresponding color difference data are calculated.

[0084] (3) The adjustment number is increased by one, and then it is determined whether the adjustment number reaches a preset number.

[0085] (4) If the adjustment number reaches the preset number, the adjustment is stopped, and based on the color difference data corresponding to multiple adjustments, optimal adjustment and the center wavelength and the bandwidth of any channel of the narrowband spectral camera after the optimal adjustment are determined; if the adjustment number does not reach the preset number, the step (1) is returned.

[0086] As shown in Figure 2 , the narrowband spectral camera is composed of n narrowband spectral channels, and the multi-primary color LCD display screen is also composed of n narrowband primary colors, wherein n is an integer greater than 3. That is, the imaging end adopts a set of n-channel narrowband spectral camera to directly acquire the n-channel spectral image of the target. The display end adopts an n-primary color LCD display screen. The LCD display screen needs to adopt n narrowband filters, the center wavelength, bandwidth and other parameters of the n narrowband filters correspond to the n-channel narrowband spectral camera, and the n primary color images are generated under the control of the backlight irradiation and the n-channel driving image signal, and then the real color image of the target is mixed.

[0087] As shown in Figure 3 , the narrowband spectral camera is composed of 6 narrowband spectral channels, and the multi-primary color LCD display screen is also composed of 6 narrowband primary colors. When working, each spectral channel of the narrowband spectral camera corresponds to a spectral component of the target spectrum, and after completing the sampling of the spectral distribution of the target scene, the corresponding channel component information is transmitted to the multi-primary color display device through the driving circuit; the multi-primary color display device displays the spectral component corresponding to the channel, so as to realize the color reproduction of the target scene. The color reproduction of the target scene by the spectral synthesis of the present application avoids the metamerism phenomenon, and thus the problem of color reproduction accuracy reduction caused by the metamerism phenomenon of the multi-primary color display can be solved.

[0088] In one specific example, the imaging end adopts a set of 6-channel narrowband spectral camera, and the display end adopts a 6-primary color LED dot matrix display screen. The narrowband spectral camera captures the target and obtains 6-channel narrowband spectral images, and then directly inputs the narrowband spectral images into the driving device of the display screen, thereby driving the multi-primary color display screen to display the color image of the target.

[0089] For the spectral parameter design of the multi-primary color LED display screen, first, the optimization parameters of the 6-channel display screen are determined according to the principle of uniformity of primary color distribution and as large wavelength range as possible: the corresponding center wavelengths can be 436 nm, 470 nm, 532 nm, 561 nm, 620 nm and 648 nm; and the corresponding spectral bandwidth is about 30 nm. Then, the initial values of the center wavelengths and bandwidths of each channel of the narrowband spectral camera are set to be completely the same as the center wavelengths and bandwidths of each channel of the multi-primary color LED display screen. Specifically, 6-channel filters combined with CMOS cameras can be used to achieve this. In order to improve the shooting speed, the method of coating the filter film on the pixels of the COMS chip can also be used.

[0090] In order to improve the accuracy of color reproduction, the center wavelengths and bandwidths of the narrowband spectral camera need to be optimized through the color matching algorithm of steps 101-601 to optimize the number of channels, center wavelengths and bandwidths of the narrowband multi-spectral camera. The optimization results are shown in Table 1. As can be seen from Table 1, the average color difference of the color reproduction of the typical target in this embodiment reaches 1.817, which belongs to the small color difference level.

[0091] Table 1 Optimization results of center wavelengths λ and bandwidths Wn of the system with channel number n = 6

[0092]

[0093] In summary, the present application uses a narrowband spectral camera with n symmetrical channels to capture n-primary color images of the target, and then uses the n-primary color images as the driving images of the n-primary color display screen, and finally displays the real color image of the target. The present application can realize the real reproduction of the color of the color target scene, and avoids the metamerism problem through spectral reproduction, thereby solving the color perception error problem caused by the metamerism phenomenon in the color reproduction process of the multi-primary color display system.

[0094] Example two

[0095] As Figure 2 or Figure 3As shown, in order to realize the technical solutions in the first embodiment and achieve corresponding functions and technical effects, the embodiment further provides a symmetric narrow-band spectral image driven multi-primary color display device, which comprises an adjusting component, a driving component, and symmetrically arranged narrow-band spectral camera 1 and multi-primary color display screen 2; the number of channels in the narrow-band spectral camera 1 is equal to the number of primary color channels in the multi-primary color display screen 2. Figure 2 The narrow-band spectral camera 1 and the multi-primary color display screen 2 in the embodiment are n channels. Figure 2 The narrow-band spectral camera 1 and the multi-primary color display screen 2 in the embodiment are 6 channels, and Figure 2 W1-W6 in the embodiment represent six sub-pixels.

[0096] The narrow-band spectral camera 1 is connected with the multi-primary color display screen 2 through the driving component, and the adjusting component is connected with the narrow-band spectral camera 1 and the multi-primary color display screen 2 respectively.

[0097] The narrow-band spectral camera 1 is used for image shooting of a target object to obtain a multi-primary color target image; the driving component is used for taking the multi-primary color target image as a driving image, so that the multi-primary color display screen 2 generates a target color display image.

[0098] The adjusting component is used for performing the symmetric narrow-band spectral image driven multi-primary color display method of the first embodiment.

[0099] Preferably, the number of channels in the narrow-band spectral camera is greater than or equal to 4; and the center wavelength of the channel in the narrow-band spectral camera is between 400 nm and 700 nm.

[0100] In the working process of the device, the narrow-band spectral camera acquires n-channel spectral images of a target scene, and each spectral channel data corresponds to a spectral component of the target scene; the n-channel spectral image data is taken as an image source by the driving circuit (i.e., the driving component), and is delivered to the primary color channel of the corresponding display system according to the channel correspondence principle, as a multi-primary color display driving value; the multi-primary color display screen reproduces the spectrum and image of the target scene according to the spectral component value.

[0101] In a specific example, in addition to using the narrow-band spectral camera to shoot to acquire n-channel spectral images of a target scene, other ways can also be used to acquire m-primary color images, and then a spectral reconstruction algorithm is used to acquire the n narrow-band spectral images; the spectral reconstruction algorithm includes a polynomial, an artificial neural network, a lookup table, etc., and is used to map the m primary color images into the n narrow-band spectral images, and m is an integer greater than 1.

[0102] Compared with the prior art, the present application also has the following advantages:

[0103] (1) The application can directly, quickly and high-quality obtain the driving image of the multi-primary color display screen, thereby providing an effective technical support for the practicalization of the multi-primary color display system.

[0104] (2) The application adopts a symmetric narrow-band multi-spectrum image driving multi-primary color display system, and the multi-spectrum imaging and the multi-primary color display system are both formed based on n spectrum channels, so that the corresponding relationship exists, the source problem of the driving image of the multi-primary color display system is solved, and the reproduction of the spectral distribution of the target scene is facilitated. At the same time, the metamerism problem is avoided through the spectral reproduction, and the color error problem caused by the metamerism phenomenon in the color reproduction process of the multi-primary color display system is solved.

[0105] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the system disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0106] The principles and implementation manners of the application are described by using specific examples in the present application, and the above embodiment description is only used to help understand the method of the application and its core idea; meanwhile, for the person skilled in the art, the specific implementation manner and application range of the application will be changed according to the idea of the application. In conclusion, the content of the specification should not be understood as the limitation of the application.

Claims

1. A symmetrical narrowband spectral image-driven multi-primary-color display method, characterized in that, The methods include: The center wavelength and bandwidth of any channel in the narrowband spectral camera to be used, the center wavelength and spectral bandwidth of any primary color channel in the multi-primary color display to be used, and the spectral reflectance of the target to be photographed are obtained; the number of channels in the narrowband spectral camera to be used is equal to the number of primary color channels in the multi-primary color display to be used; Based on the spectral reflectance of the target to be photographed, the tristimulus values ​​of the target to be photographed are calculated. Calculate the spectral transmittance of any channel in the narrowband spectral camera to be used based on the center wavelength and bandwidth of any primary color channel in the multi-primary color display to be used; calculate the spectral emission power of any primary color channel in the multi-primary color display to be used based on the center wavelength and spectral bandwidth of any primary color channel. Based on the spectral transmittance of any channel in the standby narrowband spectral camera, the spectral emission power of the corresponding primary color channel in the standby multi-primary color display screen, and the spectral reflectance of the target to be photographed, the tristimulus value of the output color of the standby multi-primary color display screen is calculated. Calculate color difference data based on the tristimulus values ​​of the target to be photographed and the tristimulus values ​​of the colors output by the multi-primary-color display screen to be used; Adjust the center wavelength and bandwidth of any channel in the narrowband spectral camera to be used based on the color difference data; The adjusted standby narrowband spectral camera is used to capture images of the target object, and the captured images are used as driving images for the standby multi-primary color display screen to obtain a target color display image.

2. The symmetrical narrowband spectral image-driven multi-primary-color display method according to claim 1, characterized in that, Based on the spectral transmittance of any channel in the narrowband spectral camera to be used, the spectral emission power of the corresponding primary color channel in the multi-primary color display to be used, and the spectral reflectance of the target to be photographed, the tristimulus values ​​of the output color of the multi-primary color display to be used are calculated, specifically including: The output value of the channel is calculated based on the spectral transmittance of any channel in the narrowband spectral camera to be used and the spectral reflectance of the target to be photographed. The relative output spectral power of the primary color channel is calculated based on the output value of any channel in the narrowband spectral camera to be used and the spectral emission power of the corresponding primary color channel in the multi-primary color display screen to be used. Based on the relative output spectral power of each primary color channel in the multi-primary color display screen to be used, the tristimulus value of each primary color channel is calculated. The tristimulus values ​​of each primary color channel in the multi-primary color display screen to be used are summed to obtain the tristimulus values ​​of the output color of the multi-primary color display screen to be used.

3. The symmetrical narrowband spectral image-driven multi-primary-color display method according to claim 1, characterized in that, Based on the tristimulus values ​​of the target to be photographed and the tristimulus values ​​of the colors output by the multi-primary-color display screen to be used, color difference data is calculated, specifically including: Choose any color block from the preset standard color chart as the target to be photographed; Based on the CIE976L*a*b* color difference formula, the color difference sub-value is calculated according to the tristimulus value of any color block and the tristimulus value of the color output by the multi-primary color display screen to be used. Based on multiple color difference sub-values, a maximum color difference sub-value, a minimum color difference sub-value, and an average color difference sub-value are determined; the maximum color difference sub-value, the minimum color difference sub-value, and the average color difference sub-value constitute color difference data.

4. The symmetrical narrowband spectral image-driven multi-primary-color display method according to claim 3, characterized in that, Adjusting the center wavelength and bandwidth of any channel in the narrowband spectral camera to be used based on the color difference data specifically includes: Based on the color difference data, and according to a preset step size, the center wavelength and spectral bandwidth of any primary color in the multi-primary color display screen are initially adjusted, and the center wavelength and bandwidth of any channel in the narrowband spectral camera to be used are initially adjusted. Based on the pre-adjusted narrowband spectral camera and the multi-primary color display screen, the corresponding color difference data is calculated; Increment the adjustment count by one, and then determine whether the adjustment count has reached the preset number; If the number of adjustments reaches the preset number, the adjustment is stopped, and based on the color difference data corresponding to the multiple adjustments, the optimal adjustment and the center wavelength and bandwidth of any channel in the narrowband spectral camera to be used are determined. If the number of adjustments does not reach the preset number, the process returns to the steps of performing preliminary adjustments on the center wavelength and spectral bandwidth of any primary color in the multi-primary color display screen and on the center wavelength and bandwidth of any channel in the narrowband spectral camera to be used, based on the color difference data and according to the preset step size.

5. The symmetrical narrowband spectral image-driven multi-primary-color display method according to claim 1, characterized in that, The formula for calculating the spectral transmittance of the channel is: The formula for calculating the spectral emission power of the primary color channel is: Among them, R n (λ) represents the spectral transmittance of the channel, λ represents the wavelength, and λ1 n W represents the center wavelength of the n-channel of the narrowband spectral camera to be used. n P represents the bandwidth of the n-channel of the narrowband spectral camera to be used; n (λ) represents the spectral emission power of the primary color channel, a n and b n Both represent normalization constants, W d λ2 represents the spectral bandwidth of the primary color channels of the multi-primary color display to be used. n This represents the center wavelength of the n-color channel of the multi-color display screen to be used.

6. The symmetrical narrowband spectral image-driven multi-primary-color display method according to claim 2, characterized in that, The formula for calculating the output value of the channel is: Among them, C n S(λ) represents the output value of the channel. j ) represents the spectral distribution of the lighting source; ρ(λ) j ) indicates that the target to be photographed is at wavelength λ j Spectral reflectance, R n (λ j ) indicates that the channel is for wavelength λ j spectral transmittance, λ j This represents the wavelength of the j-th element.

7. The symmetrical narrowband spectral image-driven multi-primary-color display method according to claim 2, characterized in that, The formula for calculating the relative output spectral power of the primary color channel is: L n =C n P n (l j ); Among them, L n This indicates that the primary color channel is related to wavelength λ. j The relative output spectral power, C n P represents the output value of the channel in the narrowband spectral camera to be used. n (λ j ) indicates that the primary color channel is for wavelength λ j spectral emission power.

8. A symmetrical narrowband spectral image-driven multi-primary-color display device, characterized in that, The device includes an adjustment component, a driving component, and a symmetrically arranged narrowband spectral camera and a multi-primary color display screen; the number of channels in the narrowband spectral camera is equal to the number of primary color channels in the multi-primary color display screen; The narrowband spectral camera is connected to the multi-color display screen via the driving component, and the adjustment component is connected to both the narrowband spectral camera and the multi-color display screen. The narrowband spectral camera is used to capture images of the target object to obtain a multi-primary-color target image; the driving component is used to use the multi-primary-color target image as a driving image to cause the multi-primary-color display screen to generate a target color display image. The adjustment component is used to perform the symmetrical narrowband spectral image-driven multi-primary color display method according to any one of claims 1-7.

9. The symmetrical narrowband spectral image-driven multi-primary-color display device according to claim 8, characterized in that, The narrowband spectral camera has a channel number greater than or equal to 4; The center wavelength of the channel in the narrowband spectral camera is between 400 nm and 700 nm.

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