Apparatus and method for color reproduction
A color-reproduction system is provided. The system includes an image-content-analysis unit that analyzes the color distribution of pixels that constitute an inputted image, a parameter-prediction unit that predicts scaling parameters based on the attribute information on the pixels, the color distribution, and the image size information, and a luminance-chroma-determination unit that determines the final luminance and chroma of the pixels using the predicted parameters.
1. A color-reproduction system adapted to transfer an original image in a first display to a destination image in a second display, the system comprising:
a processor to control each of the following units;
an image-content-analysis unit that analyzes color uniformity of an image content based on hue difference using at least one processor;
a parameter-prediction unit that predicts luminance and chroma scaling parameters based on attribute information of the pixels, a color uniformity, and image size information; and
a luminance-chroma-determination unit that determines a final luminance and chroma of the pixels using the predicted luminance and chroma scaling parameters,
wherein the attribute information comprises luminance, chroma and hue information of the pixels; the color uniformity represents a percentage value for each pixel of the image for a hue range; and the image size information comprises a subtending viewing angle of the first display and the second display.
2. The system of claim 1 , wherein the attribute information comprises color information independent of a device that displays the image.
3. The system of claim 1 , wherein an image scaling unit receives the original image and is configured to scale the received image such that the inputted image is appropriate for a display screen in which the inputted image is displayed.
4. The system of claim 1 , wherein the image-content-analysis unit analyzes the color uniformity by applying the CIECAM02 model.
5. The system of claim 1 , wherein the luminance-chroma-determination unit determines the final luminance using a linear function.
6. The system of claim 5 , wherein the linear function is expressed as J D =100+K J ×(J O −100) K J is the predicted scaling parameter for the luminance modification, J O is a luminance element that constitutes the image, and J D is the modified final luminance.
7. The system of claim 1 , wherein the luminance-chroma-determination unit determines the final chroma using a linear function.
8. The system of claim 7 , wherein the linear function is expressed as C D =K C ×C O , K c is the predicted scaling parameter for the chroma modification, C O is a chroma element of pixels that constitute the image, and C D is the modified final chroma.
9. A color-reproducing method for transferring an original image in a first display to a destination image in a second display, the method comprising:
analyzing uniformity of an image content based on hue difference;
predicting luminance and chroma scaling parameters based on attribute information, a color uniformity, and image-size information of the pixels; and
determining a final luminance and chroma of the pixels using the predicted luminance and chroma scaling parameters,
wherein the attribute information comprises luminance, chroma and hue information of the pixels; the color uniformity represents a percentage value for each pixel of the image for a hue range; and the image size information comprises a subtending viewing angle of the first display and the second display.
10. The method of claim 9 , wherein the attribute information comprises color information independent of a device that displays the image.
11. The method of claim 9 , wherein the image is scaled such that the image is appropriate for the second display in which the image is displayed.
12. The method of claim 9 , wherein the analyzing comprises analyzing the color uniformity by applying the CIECAM02 model.
13. The method of claim 9 , wherein the determining comprises determining the final luminance using a linear function.
14. The method of claim 13 , wherein the linear function is expressed as J D =100+K J ×(J O −100), where K J is the predicted scaling parameter for the luminance modification, J O is a luminance element that constitutes the image, and J D is the modified final luminance.
15. The method of claim 9 , wherein the determining determines the final chroma using a linear function.
16. The method of claim 15 , wherein the linear function is expressed as C D =K C ×C O , where K C is the predicted scaling parameter for the chroma modification, C O is a chroma element of pixels that constitute the image, and C D is the modified final chroma.
17. A non-transitory addressable storage medium storing computer program instructions that control at least one processor to implement the method of claim 9 .