CMOS Image Sensor Local Black Level Calibration Method
A technology of an image sensor and a calibration method, applied in the field of image processing, can solve the problems of brightening, blackening, and deviation in local areas, and achieve the effect of solving the brightening or blackening
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[0027] The content proposed by the present invention will be described in detail below with reference to the accompanying drawings. figure 1 The basic flow chart of the local black level calibration method proposed by the present invention, combined with figure 2 The schematic diagram of image area division given in, the specific implementation of the present invention is as follows:
[0028] First, the image area is divided into M×N blocks (eg, M rows, N columns), as figure 2 As shown in the figure, the example in the figure is that each block of the image area is divided at equal distances, and the content of this embodiment is not limited to the specific implementation of dividing each block at equal distances. Taking an area block in the figure as an example, the intersection of the dividing lines of each block is set as the calibration point, and the initial calibration coefficient K(m,n) is set, where the value range of m is 0~M, and the value range of n is 0 to N. ...
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