Patent Document ID: 20130169825
Application ID: 13683276
Patent Status: 0

Claim One:
1. A method for measuring response curve of an image sensor, comprising: taking at least one photograph of a Grey Scale card with an image sensor to be measured, wherein said Grey Scale card has a plurality of greyscale blocks, each greyscale block having a uniform greyscale, different greyscale blocks having different greyscales, and said at least one photograph comprises a plurality of greyscale image blocks respectively corresponding to said greyscale blocks; calculating relative exposure values for each greyscale image block of said at least one photograph, wherein said relative exposure value is a product of said exposure time with which said corresponding photograph is taken and said greyscale of corresponding greyscale block; plotting a plurality of reference points based on pixel values of pixel points within each greyscale image block and said relative exposure values of said greyscale image blocks, wherein said reference points have said pixel values as said ordinate and said relative exposure values as said abscissa; and executing an interpolation calculation based on said plurality of reference points to obtain a response curve of the image sensor.