Why the first frame image triggered by TDI is partially all white?
Because in the external trigger mode, when there is no pulse, the camera is always in the exposure state, which is related to the TDI stage. The 256 level is 256 bright lines, which are partially all white in the image. But because of the sensor anti-blooming, there are hundreds of lines of data.
Solution:
The standard firmware has increased the first n lines are deleted when starting acquisition. The number of deleted lines is set by the offset Y parameter of the interface, and the deletion operation takes effect in two cases:
1) start Effective upon collection.
2) The trigger signal stops longer than 2ms for restart.