| 摘要 |
Systems and techniques can be used to correct color of an image by expanding red, green, blue (RGB) values at each pixel of the image using a base of order-root functions f(R, G, B). In one aspect, a method includes receiving an image, where a plurality of pixels of the received image have input RGB values that depend on a sensor used to acquire the image; expanding, by an image processor, the input RGB values of the plurality of pixels using a nonlinear base, such that each term of the nonlinear base scales linearly with exposure or brightness of the image; and adjusting, by the image processor, the image by transforming the expanded input RGB values of the image to output RGB values that are independent of the sensor used to acquire the image and scale linearly with the exposure or illumination of the image. |
