The main reason is that the resolution and contrast degree of the ultrasonic image itself is very low as well as the influence of intrinsic speckle noises.
其原因主要是超声图像本身分辨率、对比度较低，以及固有的斑点噪声的影响。
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An intrinsic accuracy, adjustable resolution ramp generator IP core designed for the column single-slope ADC in a CMOS image sensor is presented.
Therefore, it is of great importance to conduct deep research into the intrinsic motivation and affecting factors of procrastination, and find out resolution to this problem.