Method for converting a high resolution image to true color using a low resolution color image
OwnerYecheng Wuinventor
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Abstract
A method for converting a high resolution greyscale digital image to a color image using a low resolution digital color image of the same area or region. The low resolution color image is first registered to the high resolution greyscale image. For each pixel in the high resolution greyscale image, three color elements (red, green, blue or RGB) are calculated from the value of the pixel in the greyscale image and the color value (RGB) of the pixel at the same location in the registered color image. After this process, the high resolution greyscale image will have red, green and blue color elements (RGB) to be used and displayed as a color image.
Claims8
In a computer system, a method for converting high resolution greyscale digital image to color using low resolution color or multi-spectral image of the same object or area, said low resolution color or multi-spectral image formed of pixels each pixel having a red, a green, a blue value, comprising the steps of:
- (a) registering a low resolution color image to a high resolution greyscale image such that each pixel in the greyscale image corresponds to a pixel at the same location in the high resolution color image;
- (b) for each pixel in the high resolution greyscale image, generating three color components (red, green, blue) from the greyscale value of the pixel in the high resolution image and the red, green and blue values of the corresponding pixel in the low resolution image using a factor T calculated as a function of a ratio of total pixel value in the color image to pixel value in the greyscale image.
- (c) forming a high resolution color image from the generated three color components for each pixel in the greyscale image.
Dependencies are inferred from the claim text.