I have a flatbed scanner. The make is ScanMaker3800. It shows a white line everytime I scan something on my computer. When I go to the scanned image the white line is still there.
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Hello Therese.
Does the white line run vertically through your scanned image? Â Here are some possible reasons for the white line:
1. Â Bad pixels on the CCD. Â The CCD is the sensor that actually "sees" the images and converts it to electrical signals for processing. Â If there are defective pixels in the CCD, it will manifest as white lines on the scanned image. Â Think of it as a sort of blind spot. Â If this is the error then you may have to bring your scanner in for repairs or replacement.
2. Â Error in calibration. Â Scanners usually perform white calibration. Â If there is anything that blocks the CCD while it is calibrating, then the scanner might mistake that blockage as a problem with underexposure. Â It will then try to compensate by increasing the brightness. Â It is possible that the white line you see is actually just a very bright portion due to the calibration error. Â Check the scanned image to determine if it is really white or just a very bright image of the original. Â Try cleaning the glass of the scanner bed especially on the portion that corresponds to the white line and perform white calibration again. Â Consult your scanner's manual on how to re-calibrate.
