The fourth check box allow you to perform a bad pixel removal operation on the image.
Even after calibrating the image with the calibration reference frames, the image may
have several hot or cold pixels. These are usually associated with defects in the image
sensor and are at a fixed position relative to the pixel array in the sensor. Checking the
‘
Bad-pixel Removal
’
box will allow the program to find, and map out all of these bad pix-
els in the image.
You may notice that in the above screen snapshot, one of the check boxes are shown
disabled. The program checks to see that a valid calibration frame has been acquired
by the camera before allowing you to specify the operation to be performed. If, for in-
stance, you have not collected a flat frame, the
‘
Flat Field
’
check box will be disabled
and the red warning text will be displayed reminding you to perform the Flat Frame ac-
quisition.
Changing the mode of the camera from Full-frame to Sub-frame operation, or changing
the size of the sub-frame region will invalidate the calibration frame data and you will
have to take them over again.
You can see the effects of applying a various calibration operation by checking and un-
checking the respective check box. The operation will be alternatively done and un-
done with the image redisplayed each time.
fishcamp engineering
Starfish
Guide Camera
