TWI395194B - Image adjusting apparatus - Google Patents

Description

Image adjustment device

The invention relates to an image adjusting device, in particular to an image adjusting device for adjusting the color of an image.

Like a standard cathode ray tube display (CRT), a field emission display (FED) emits light by illuminating high-energy electrons onto image elements (pixels) of a phosphor screen, and then excited. Fluorescent substances convert their electron energy into visible light. However, unlike conventional cathode ray displays (CRTs) that use one or three electron beams to scan a raster pattern in a phosphor screen, the field emission flat panel display uses a fixed electron beam to scan the color elements of each pixel. Compared with the distance between the scanning electron beam and the screen of a conventional cathode ray tube display (CRT), the distance between the electron source and the screen becomes very small. In addition, field emission flat panel displays consume far less power than cathode ray tube displays. The above conditions make field emission flat panel displays (FEDs) one of the more popular displays.

However, the chromaticity values of the red (Red), green (Green), and blue (Blue) colors of each image pixel (Pixel) of the field emission flat panel display may have different degrees of color shift due to the decrease in brightness of the image. (Shift), causing distortion of the image color. Therefore, it is necessary to develop a problem that can effectively compensate the color shift that may occur in the case where the image is low in brightness, thereby further improving the quality of the displayed image.

Therefore, it is indeed necessary to propose an image adjusting device for adjusting the color of the display image at a low brightness, thereby improving the quality of the displayed image.

Accordingly, it is an object of the present invention to provide an image adjustment apparatus for adjusting the color of an image to solve the problems faced by the prior art.

The embodiment of the present invention discloses an image adjusting device for adjusting the color of an image frame. The image adjusting device includes a conversion module, a processing module, an output module, a display module, and a measuring module. Group and a computing module. The conversion module is configured to convert an input image into an image signal. The processing module is coupled to the conversion module for adjusting the image signal according to a gain value to generate an output signal. The output module is coupled to the processing module for generating an output image according to the output signal. The display module is coupled to the output module for displaying the output image. The measurement module is coupled to the display module for measuring the output image to generate a measured value. The calculation module is coupled to the measurement module and the processing module for generating the gain value according to the measured value.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of an image adjusting device according to the present invention. The image adjustment device 10 is configured to adjust the color of an image frame. The image adjustment device 10 includes a conversion module 12, a processing module 14, an output module 16, a display module 18, and a The measurement module 20 and a calculation module 22 are included. The conversion module 12 is configured to convert an input image I _IMG into an image signal S _IMG . The processing module 14 is coupled to the conversion module 12 for adjusting the image signal S _IMG according to a gain value V _G to generate an output signal S _OUT . The output module 16 is coupled to the processing module 14 for generating an output image IMG according to the output signal S _OUT . The display module 18 is coupled to the output module 16 for displaying the output image IMG. In one embodiment, the display module 18 is a field emission display (FED). The measurement module 20 is coupled to the display module 18 for measuring the output image IMG to generate a measured value M _Value . In one embodiment, the measurement module 20 is a common color temperature analyzer, which can be used to measure the color information presented by the output image IMG, and generate the measured value M _Value according to the color information. The calculation module 22 is coupled to the measurement module 20 and the processing module 14 for generating the gain value V _G according to the measured value M _Value .

The conversion module 12 converts the input image I _IMG into the image signal S _IMG of a specific image format. In one embodiment, the particular image format is an RGB image format.

The processing module 14 includes a determining unit 141 and a compensation unit 143. The determining unit 141 is configured to determine whether the image signal S _IMG is within a predetermined range, and generate a determination signal S _D according to the determination result. The compensation unit 143 is coupled to the determining unit 141 for adjusting the image signal S _IMG according to the determining signal S _D and the gain value V _G to generate the output signal S _OUT . The processing module 14 is configured to determine whether the brightness of the image signal S _IMG is within a predetermined range. If yes, the determining unit 141 generates the determining signal S _D , and the processing module 14 according to the determining signal S _D and the gain The value V _G adjusts the image signal S _IMG to generate the output signal S _OUT . If not, the processing module 14 directly outputs the image signal S _IMG to the output module 16 as the output signal S _OUT . In one embodiment, the predetermined range is that the brightness of the image signal S _IMG is less than 20%. Regarding the predetermined range described herein, the user can set it according to his own needs and preferences, and is not limited to this embodiment. The brightness of the image signal S _IMG set in this embodiment is less than 20%, and the brightness below 20% is regarded as low brightness. When it is determined that the image signal S _{IMG is} in low brightness, the processing module 14 will The image signal S _IMG is adjusted. Otherwise, the image signal S _IMG is directly output as the output signal S _OUT .

Further, in one embodiment, the display module 18 to generate a plurality of output values based image IMG according to a plurality of conditions, the measurement system used for measuring module 20 relative to a plurality of output image IMG be a plurality of measured values M _Value And wherein each of the plurality of condition values is a color temperature value. The calculation module 22 includes a comparison table (not shown) having a plurality of condition values and a corresponding plurality of gain values V _G , and the plurality of measurement values M _Value Each of the measured values corresponds to one of the plurality of gain values V _G , respectively. The compensation unit 143 adjusts the image signal S _{IMG according} to the gain value V _G corresponding to the measured value M _Value measured by the measurement module 20 to generate the output signal S _OUT . In the embodiment, when the display module 18 is shipped from the factory, the measurement module 20 can first measure the output image IMG at different color temperature values to generate a corresponding measured value M _Value , and further according to the amount. The measured value M _Value generates a corresponding gain value V _G , and finally stores the color temperature values and the gain values V _G in a comparison table (not shown), so that only a comparison table (not shown) is needed in the future. The image signal S _IMG can be automatically adjusted, and finally the adjusted output image IMG can be generated without measuring each time, which can improve user convenience.

In various embodiments of the present invention, the output image generated by the image adjusting device of the present invention can automatically adjust the color of the output image without a low brightness when the output image of the display is low in brightness. The color of the lower image will produce a color shift, which further causes the problem of poor quality of the display image, thereby improving the display image display capability and further improving the quality of the displayed image.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

10. . . Image adjustment device

12. . . Conversion module

14. . . Processing module

16. . . Output module

18. . . Display module

20. . . Measurement module

twenty two. . . Computing module

141. . . Judging unit

143. . . Compensation unit

I _IMG . . . Input image

S _IMG . . . Image signal

S _D . . . Judgment signal

S _OUT . . . Output signal

M _Value . . . Measured value

V _G . . . Gain value

IMG. . . Output image

Fig. 1 is a schematic view showing the image adjusting device of the present invention.

10. . . Image adjustment device

12. . . Conversion module

14. . . Processing module

16. . . Output module

18. . . Display module

20. . . Measurement module

twenty two. . . Computing module

141. . . Judging unit

143. . . Compensation unit

I _IMG . . . Input image

S _IMG . . . Image signal

S _D . . . Judgment signal

S _OUT . . . Output signal

M _Value . . . Measured value

V _G . . . Gain value

IMG. . . Output image

Claims (12)

An image adjustment device for adjusting the color of an image frame, the image adjustment device comprising: a conversion module for converting an input image into an image signal; and a processing module coupled to the conversion module And determining whether the brightness of the image signal is lower than a predetermined value, and if so, adjusting the image signal according to a gain value to generate an output signal; if not, directly outputting the image signal as the output signal; The output module is coupled to the processing module for generating an output image according to the output signal; a display module coupled to the output module for displaying the output image; and a measurement module, And being coupled to the display module for measuring the output image to generate a measured value; and a computing module coupled to the measuring module and the processing module for determining the measured value This gain value is generated. The image adjustment device of claim 1, wherein the conversion module converts the input image into the image signal of a specific image format. The image adjustment device of claim 2, wherein the specific image format is an RGB image format. The image adjustment device of claim 1, wherein the display module is a field emission display (FED). The image adjustment device of claim 1, wherein the processing module comprises: a determining unit, configured to determine whether the brightness of the image signal is lower than the predetermined value, and generate a determining signal according to the determining result; and a compensation unit coupled to the determining unit for determining the signal and the gain according to the determining unit The value adjusts the image signal to generate the output signal. The image adjusting device of claim 5, wherein the predetermined value is 20%. The image adjustment device of claim 5, wherein the display module generates a plurality of output images according to a plurality of condition values, wherein the measurement module is configured to measure a plurality of corresponding plurality of output images. Measurement value. The image adjustment device of claim 7, wherein the calculation module comprises a comparison table having a plurality of condition values and corresponding plurality of gain values. The image adjusting device of claim 8, wherein each of the plurality of condition values is a color temperature value. The image adjusting device of claim 8, wherein each of the plurality of measured values corresponds to one of the plurality of gain values. The image adjustment device of claim 10, wherein the compensation unit adjusts the image signal according to the gain value corresponding to the measured value measured by the measurement module to generate the output. Signal. The image adjustment device of claim 1, wherein the measurement module is a color temperature analyzer, and the color temperature analyzer is configured to measure color information of the output image to generate the measurement value.