Signals whether the document image is bright enough.
Handwritten image check.
Image colorness check.
Focus quality check.
Glares presence check.
Image resolution check.
Document occlusion check.
Image perspective check, i.e. the deviation of the corners of the document from the value of 90 degrees is checked.
Portrait image check.
Image moire check.
Will be returned if a non-existent value was passed.
Image quality check if the whole document page is completely within the image.