Method of reading image signal from image senser
An image sensor and image signal technology, applied in the direction of image communication, electrical components, etc., can solve the problems of increasing circuit power consumption and area, reducing light-receiving area, incompatibility, etc., and achieving low analog-to-digital conversion rate, area and power. The effect of high power consumption and convenient image processing
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[0010] The readout method of the image signal in the image sensor that the present invention proposes, at first selects the scanning row from the image successively, scans each column pixel successively to the selected scanning row by column scanning frequency; Low-pass filtering of Wn; the analog-to-digital conversion is performed on the low-pass filtered signal to obtain a digital image signal.
[0011] In the above readout method, in order to simplify the subsequent image compression process, the acquisition speed of the image is required to be very high, so the number of images acquired per second is very large, so the high-resolution CMOS image sensor must be very demanding. Row and column scan speed, where the column scan speed is the horizontal resolution times the row scan speed. If a CMOS image sensor with a resolution of 1000×1000 acquires 1000 pictures per second, the row scanning frequency is 1MHz, while the column scanning frequency is as high as 1000MHz. Such a ...
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