Analysis on noises of image sensor of welding robot

摘要

For the non-linearity of the reflectance of laser stripe on the work piece and performance of camera lens, the random noise added in the process of photoelectricity conversion, the storage, transmission and export of the electric charge of signal having the noises such as dark current, the video signal produced noises when transmitted, quantification noises hade by the A/D conversion of the video signal,definite error of the digital image signal will be resulted in the processes of acquiring the weld's information of the computer vision system of welding robot. In order to reduce the impact on the errors, the image noise of the image sensor is analyzed,and an experiential image noise model have been set up, the experimental results prove this model is effectual and applied.