초록 ▼

A method for calibrating a multi-chip image sensor, and an imaging system having a multi-chip sensor that includes color correction factors generated by such a method. The image sensor is successively controlled to image three different test targets. After imaging each target, a set of correction fa

A method for calibrating a multi-chip image sensor, and an imaging system having a multi-chip sensor that includes color correction factors generated by such a method. The image sensor is successively controlled to image three different test targets. After imaging each target, a set of correction factors is generated and used to correct image signals generated when imaging the next test target. A first set of correction factors corrects for pixel-to-pixel variations between imaging elements in the array. The second set of correction factors corrects for chip-to-chip variations between chips in the array. The third set of correction factors corrects for array-wide variations compared to a standard color chart.

대표청구항 ▼

[ What is claimed is:] [1.] A method for calibrating a multi-chip RGB image sensor, comprising the steps of:controlling the image sensor to image a white calibration target and output at least one red, green and blue image signal from each chip in the array;analyzing the image signals;generating a c

[ What is claimed is:] [1.] A method for calibrating a multi-chip RGB image sensor, comprising the steps of:controlling the image sensor to image a white calibration target and output at least one red, green and blue image signal from each chip in the array;analyzing the image signals;generating a correction factor for each imaging element in each chip based on a result of analyzing the image signals;controlling the image sensor to image a test target having one stripe each of red, green and blue, and output a second set of red, green and blue image signals from each chip;analyzing the second set of image signals;generating a correction factor matrix for each chip based on a result of analyzing the second set of image signals;controlling the image array to image a third test target having a plurality of color patches, and output a third set of red, green and blue image signals from each chip;analyzing the third set of image signals; andgenerating a matrix of correction factors for the array based on a result of analyzing the third set of image signals.