| 摘要 |
PURPOSE: A driving method of an image processor is provided to implement a precise noise removal operation for each image sensor by obtaining and storing a value suitable for the hardware property of an image sensor which is manufactured in advance and using the stored value in a noise removal task. CONSTITUTION: An image sensor extracts frame values and calculates the standard deviation of the frame values(S7,S8). In case the obtained values of each section are largely distributed, an image processor stores all the extracted values(S9,S10). In case the values of each section are not largely distributed, the processor stores a standard deviation value about a whole frame in an OTP(One Time Password) memory of the image sensor(S11,S12). The processor performs a noise cancellation by using the obtained standard deviation. [Reference numerals] (S1) Wafer level power on; (S10) Store extracted values; (S11) Store a part of extracted values; (S12) Storage in an OTP memory of an image sensor; (S2) Wafer heating (50-60°C); (S3) Black level correction, dead pixel correction; (S4) One frame; (S5) Normal condition (gain 2x control); (S6) First illumination condition ( maximum gain); (S7) Frame value extraction; (S8) Standard deviation calculation; (S9) Distribution of a value of each region
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