Image adjustment method and related apparatus

Abstract

An image adjustment apparatus and method for a display screen, including applying content analysis to an original image, determining a relevant specific power saving mode to reduce intensity of a specific color of the original image based on a result of the content analysis, and executing the relevant specific power saving mode.

Description

[0001] CROSS-REFERENCE

[0002] This application claims priority to U.S. Provisional Patent Application No. 63 / 283,246, filed November 25, 2021, which is hereby incorporated by reference in its entirety TECHNICAL FIELD

[0003] The present disclosure relates generally to image adjustment of display devices, and more particularly, to techniques for specific color adjustment of display devices. BACKGROUND

[0004] With advanced technology, portable electronic devices with display screens have a blue light protection function to reduce the blue intensity of images displayed on the display screen to protect the eyes. However, the conventional blue light protection function is used to reduce the pixel values of the image by the same amount or the same proportion. The conventional blue light protection function cannot identify the color temperature of the image, so the image after the blue light reduction process does not have good image quality, and the power saving efficiency brought by the conventional blue light protection function cannot achieve better performance in the case of an original image being a high color temperature image. SUMMARY

[0005] The present disclosure provides an image adjustment method and related image adjustment device with multiple power saving modes suitable for different scenarios to solve the above problems.

[0006] The present disclosure provides an image adjustment method applied to a display panel, including content analysis of an original image, determining a related specific light saving mode according to the results of the content analysis, reducing the intensity of a specific color of the original image, and executing a related specific light power saving mode.

[0007] The present disclosure further discloses an image adjustment device applied to a display panel, including an operation processor suitable for content analysis of an original image, and determining a related specific light power saving mode according to the results of the content analysis to reduce the intensity of a specific color of the original image, and executing a related specific light power saving mode.

[0008] The image adjustment method and image adjustment device of the present disclosure can detect the scene mode of each frame in the image stream using a content analyzer, and select one of multiple specific light saving modes according to the detected scene mode. Adjust the color intensity of the original image to reduce color deviation in different scenes, and achieve the advantages of optimal image quality and optimal power saving efficiency.

[0009] These and other objects of the present disclosure will no doubt become apparent to those of ordinary skill in the art after reading the following detailed description of the preferred embodiments that are illustrated in various drawings and accompanying figures. Attached Figure Description

[0010] FIG. 1 This is a functional block diagram of an image adjustment device according to one embodiment of the present invention.

[0011] FIG. 2 This is a distribution diagram of red pixels in a high color temperature image according to an embodiment of the present invention.

[0012] FIG. 3 This is a distribution map of green pixels in a high color temperature image according to an embodiment of the present invention.

[0013] FIG. 4 This is a distribution diagram of blue light pixels in a high color temperature image according to an embodiment of the present invention.

[0014] FIG. 5 This is a result image of the content analyzer applied to a high color temperature image according to an embodiment of the present invention.

[0015] FIG. 6 This is a regression line graph used to adjust a bluish image according to an embodiment of the present invention.

[0016] FIG. 7 This is a color distribution diagram of a high color temperature image after adjustment according to an embodiment of the present invention.

[0017] FIG. 8 This is a color distribution diagram of a low color temperature image and an adjusted low color temperature image according to an embodiment of the present invention.

[0018] FIG. 9 This is a flowchart of an image adjustment method according to an embodiment of the present invention. Detailed Implementation

[0019] Please refer to FIG. 1 . FIG. 1 This is a functional block diagram of an image adjustment device 10 according to an embodiment of the present invention. The image adjustment device 10 may be separate from but electrically connected to the display screen 12, or it may be a built-in component of the display screen 12. The image adjustment device 10 can be applied to mobile phones, tablet computers, laptops, or desktop computers, etc., and may include a processing unit 14 for analyzing the current scene mode of the original image from the display screen 12 to correspondingly reduce the intensity of specific colors of the original image to be displayed, providing advantages such as energy saving and extended lifespan on the display screen 12.

[0020] The image adjustment device 10 can obtain the color temperature of the original image through a content analyzer, and then select a specific light power saving mode to adaptively adjust the intensity of the specific color of each frame in the image stream. In one possible embodiment, the display screen 12 can have blue, green and red light emitting units. The blue light emitting unit is a less stable emitter, and the performance of the blue light emitting unit is worse than that of the green and red light emitting units. The specific light power saving mode can be used to reduce the intensity of the blue color in the original image, and moderately reducing the intensity of the blue color can be beneficial to power saving and life of the display screen 12.

[0021] Therefore, each original image in the stream can be classified into a plurality of scene modes, such as at least a first scene mode and a second scene mode. The first scene mode can be related to a high color temperature image or a cooler image or a blue-biased image, and the second scene mode can be related to a low color temperature image or a warmer image or a red-biased image. The image adjustment device 10 can include a plurality of specific light power saving modes, such as at least a first specific light power saving mode and a second specific light power saving mode. The first specific light power saving mode can be used for the first scene mode and can be understood as a power saving mode with higher long-time use and reading comfort, and the second specific light power saving mode can be used for the second scene mode and can be understood as a general power saving mode with more vivid display. The plurality of specific light power saving modes can correspond to the plurality of scene modes.

[0022] If a frame (i.e. an original image) in the image stream is analyzed as the first scene mode, the function of any specific light power saving mode can be turned on, or the first specific light power saving mode with a large reduction can be turned on to reduce the intensity of the blue color of all pixels in the original image. If the frame in the image stream is analyzed as the second scene mode, the function of the specific light power saving mode can be turned off, or the second specific light power saving mode with a smaller reduction can be turned on to maintain the original color of the image without a serious color bias.

[0023] Please refer to FIGS. 2-7 . FIG. 2 is a distribution diagram of red light pixels in a high color temperature image according to an embodiment of the present application. FIG. 3 is a distribution diagram of green light pixels in a high color temperature image according to an embodiment of the present application. FIG. 4 is a distribution diagram of blue light pixels in a high color temperature image according to an embodiment of the present application. FIG. 5 is a result diagram of a content analyzer applied to a high color temperature image according to an embodiment of the present application.FIG. 6 is a regression line graph for adjusting a blue-skewed image according to an embodiment of the present application. FIG. 7 is a color light distribution graph for a high color temperature image adjusted according to an embodiment of the present application.

[0024] The color light distribution of the high color temperature image can be obtained by detecting a color distribution histogram, or detecting a target object of blue, or based on an optical spectrum of the color light distribution of the high color temperature image. As an example of the optical spectrum, the image adjusting device 10 can measure a ratio of a harmful blue light spectrum to a whole spectrum, or a ratio of a harmful blue light spectrum to a blue light spectrum, or a ratio of a peak blue light spectrum to a peak non-blue light spectrum, using a spectrometer or an integrating sphere or a colorimeter. The application of the content analyzer is not limited to the above-mentioned embodiments, and can be determined according to actual needs.

[0025] The curve C1 can represent a blue light component of a larger intensity, for example, a wavelength between 380 nm and 500 nm, and thus the high color temperature image can have a blue-skewed foreground or a blue-skewed background. The content analyzer can output analyzer data, such as a blue light power saving index, or a correlated color temperature or a color coordinate, to the anti-blue light intensity decider for determining a regression line of blue light reduction (which can be shown in FIG. 6 The regression line can be calibrated by panel information (for example, a gamma value or a vertex point value or any other calibration data for calibrating the display screen) of the display screen 12, and then applied to the curve C1 to generate an adjusted curve C2; the intensity of the blue light component in the curve C2 can be attenuated, and then compared with the curve C1, the intensity of the green light component and the red light component between the curves C1 and C2 are similar, thereby reducing the intensity of the blue light and correcting all pixels within the high color temperature image. In this embodiment, the first blue light power saving mode can be turned on to obtain better image quality, long-time use and reading comfort.

[0026] The anti-blue light strength decision maker can analyze the blue light reduction line and the tuning offset line to determine a target point on the line between the blue light reduction line and the tuning offset line. The line associated with the target point can generate a blue light power saving core together with the calibration data, and then a regression line can be generated by the blue light power saving core for pixel-by-pixel color correction and RGB adjustment for all pixels within the original image range. The pixel-by-pixel color correction and RGB adjustment can be influenced by, but not limited to, the effect strength decision maker, the image color temperature, the tuning offset line, and the blue light reduction line. The blue light reduction line can be set in a color chart by any possible algorithm, and can be directed to a boundary point of 435nm by a white point of the color chart. The tuning offset line can be generated by a rotation or offset of the blue light reduction line, and further intersected with the blue light reduction line by the white point. The application of the anti-blue light strength decision maker and the blue light power saving core is not limited to the above-mentioned embodiments, and can be determined according to actual needs.

[0027] Please refer to FIG. 8 . FIG. 8 A color light distribution diagram of a low color temperature image and an adjusted low color temperature image of an embodiment of the present application is shown in FIG. 3. Curve C3 can represent the color light distribution of the original image; the intensity of the blue light component can be similar to or less than that of the green light component and the red light component. The image adjustment device 10 can obtain a relevant regression line (not shown in the figure) by using the content analyzer and the anti-blue light strength decision maker and the blue light power saving core described above, and then generate curve C4 representing the color light distribution of the adjusted low color temperature image by using the relevant regression line. In this embodiment, the second blue light power saving mode can be turned on to reduce the color shift and display bright colors.

[0028] It is worth mentioning that the specific light power saving mode of the image adjustment device 10 can not only reduce the blue light (e.g., blue light value), but also reduce the green light (e.g., green light value) and the red light (e.g., red light value). The present application can reduce the intensity of the specific light (e.g., blue light value) to save power, and the intensity of other lights (e.g., green light value and red light value) can be further reduced by a specific ratio to avoid serious color deviation. The image adjustment device 10 can provide a better balance between power saving function and image quality. The intensity reduction is not limited to blue, green and red, depending on actual needs. For example, if the display screen 12 has only one light emitting unit, the image adjustment device 10 can adjust the color intensity of the light emitting unit to better balance the power saving function and the image quality.

[0029] The blue light intensity can be reduced (i.e., the specific light power saving mode is turned on) to reduce the blue light brightness of the original image, or to reduce the operating current of the display screen 12, or to reduce the SOC (System on chip) effect intensity; the related application is not limited to the above-mentioned embodiments. The type of the display screen 12 can be, but is not limited to, an OLED (Organic Light Emitting Diode) display, an AMOLED (Active Matrix Organic Light Emitting Diode) display, a Mini LED display or a Micro LED display. The intensity of the blue light emitting unit is adaptively adjusted so that the display screen emits the specific light with the adjusted intensity. The intensity of the light emitting unit can also be adaptively adjusted, and the intensity of the display screen emitting unit is adjusted to produce other lights in addition to blue light

[0030] Please refer to FIG. 9 . FIG. 9 is a flowchart of an image adjustment method according to an embodiment of the present application. FIG. 9 The image adjustment device 10 shown in FIG. 1 The image adjustment device 10. First, step S100 can be performed to analyze the content of the original image. The content analysis can detect the color distribution histogram or spectrum of the original image to determine how to adjust the intensity of the pixels in the original image; in addition, the content analysis can use object recognition technology to detect target objects with specific colors in the original image and adjust the intensity of the pixels within the target object range.

[0031] Then, steps S102 and S104 can be performed to output the specific light power saving index and the related color parameter according to the result of the content analysis, and analyze the specific light power saving index and the related color parameter to determine the specific light attenuation curve. The related color parameter can be the color temperature or the color coordinate, depending on the design requirement. The specific light attenuation curve can be understood as a specific light power saving mode or the regression line described above. Then, step S106 and step S108 can be performed to acquire the calibration data from the display screen 12, analyze the calibration data and the specific light attenuation curve to calculate the specific light power saving kernel, so that the related specific light power can determine the power saving mode (e.g., the specific light power saving kernel) of reducing the intensity of the specific color of the original image according to the result of the content analysis. Then, step S110 can be performed to execute the related specific light power saving mode from the plurality of specific light power saving modes to reduce the intensity of the specific color of the original image according to the specific light power saving kernel.

[0032] In summary, the image adjustment method and the image adjustment device of the present application can detect the scene mode of each frame in the image stream by using the content analyzer, and select one of the plurality of specific power saving modes as needed. The scene mode is detected to adjust the color intensity of the original image, thereby reducing the color deviation of different scenes, and achieving the advantages of optimal image quality and optimal power saving efficiency.

[0033] Those skilled in the art will readily observe that numerous modifications and changes can be made to the devices and methods without departing from the teachings of the present application. Accordingly, the above disclosure is to be construed as the only limited to the specific exemplification set forth herein.

Claims

1. An image adjustment method applied to a display screen, comprising: applying content analysis to an original image; classifying the original image into a first scene mode or a second scene mode according to a result of the content analysis; selecting a first specific light power saving mode or a second specific light power saving mode from a plurality of specific light power saving modes of the display screen according to a classification result of the original image, wherein the first scene mode is associated with a high color temperature image or a cooler image or a blueish image, and is suitable for a first specific light power saving mode with a large reduction, the second scene mode is associated with a low color temperature image or a warmer image or a reddish image, and is suitable for a second specific light power saving mode with a small reduction, and the specific light is blue light; and executing the relevant specific light power saving mode.

2. The image adjustment method of claim 1, wherein, further comprising: outputting a specific light power saving index and a relevant color parameter according to the result of the content analysis; and analyzing the specific light power saving index and the relevant color parameter to determine a specific light decay curve, wherein the relevant specific light power saving mode is determined according to the specific light decay curve. further comprising:

3. The image adjustment method of claim 1, wherein, obtaining panel information of the display screen; analyzing the panel information, wherein a specific light power saving kernel is calculated according to the panel information and the specific light decay curve; and selecting the relevant specific light power saving mode according to the specific light power saving kernel. further comprising: adjusting the intensity of the specific color of the original image by at least one of an effect intensity determinator, an image color temperature, a tuning offset, and a specific light decay curve.

4. The image adjusting method of claim 1, wherein, further comprising: detecting a color distribution histogram of the original image, a target object with the specific color in the original image, or a spectrum based on a color light distribution of the original image for the content analysis.

5. The image adjusting method of claim 1, wherein, executing the relevant specific light power saving mode to reduce the specific light brightness of the original image, or the operating current of the display screen, or the SOC effect intensity, for reducing the intensity of the specific color. further comprising:

6. The image adjusting method of claim 1, wherein, adaptively adjusting the intensity of the specific light illumination unit to cause the display screen to emit the specific light with the adjusted intensity.

7. The image adjusting method of claim 1, wherein further comprising: adaptively adjusting the intensity of the specific light illumination unit to cause the display screen to emit other light in addition to the specific light after adjusting the intensity of the display screen emission unit.

8. The image adjustment method of claim 1, wherein, 9. An image adjustment device applied to a display screen, comprising: a computing processor configured to perform content analysis on an original image, classify the original image into a first scene mode or a second scene mode according to a result of the content analysis, select a first specific light power saving mode or a second specific light power saving mode from a plurality of specific light power saving modes of the display screen according to a classification result of the original image, wherein the first scene mode is associated with a high color temperature image or a cooler image or a blueish image, and is suitable for a first specific light power saving mode with a large reduction, the second scene mode is associated with a low color temperature image or a warmer image or a reddish image, and is suitable for a second specific light power saving mode with a small reduction, and the specific light is blue light, and execute the relevant specific light power saving mode. ​ ​ 10. The image adjusting apparatus according to claim 9, wherein The operation processor is further configured to output a specific light power saving index and related color parameters according to a result of the content analysis, analyze the specific light power saving index and related color parameters to determine a specific light attenuation curve, and determine a related specific light power saving mode according to the specific light attenuation curve.

11. The image adjusting apparatus according to claim 9, wherein The operation processor is further configured to obtain panel information of the display screen, analyze the panel information, calculate a specific light power saving kernel according to the panel information and the specific light attenuation curve, and select a related specific light power saving mode according to the specific light power saving kernel.

12. The image adjusting apparatus according to claim 9, wherein The operation processor is further configured to adjust an intensity of a specific color of the original image by at least one of an effect intensity determiner, an image color temperature, a tuning offset, and a specific light attenuation curve.

13. The image adjusting apparatus according to claim 9, wherein The operation processor is further configured to detect a color distribution histogram of the original image, a target object having the specific color in the original image, or a spectrum based on a color light distribution of the original image, for content analysis.

14. The image adjusting apparatus according to claim 9, wherein The related specific light power saving mode is executed to reduce a specific light brightness of the original image, an operating current of the display screen, or an SOC effect intensity, for reducing the intensity of the specific color.

15. The image adjusting apparatus according to claim 9, wherein The intensity of the specific light illumination unit is adaptively adjusted to cause the display screen to emit the specific light with the adjusted intensity.

16. The image adjusting apparatus according to claim 9, wherein The operation processor is further configured to adaptively adjust the intensity of the illumination unit, and generate other light in addition to the specific light after adjusting the intensity of the display screen emission unit. The operation processor is further configured to adaptively adjust the intensity of the illumination unit, and generate other light in addition to the specific light after adjusting the intensity of the display screen emission unit.

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