Textract results on recognizing basic arithmetic seems to degrade with color
This series of images show Textract failing unusually in all cases except the one where the image has been both grayscale and brightness/contrast (50/50 and 25/25)
- unedited image from the camera FAIL
- brightness contrast applied without grayscale FAIL
- grayscale FAIL
- grayscale with brightness contrast finally!
Is one supposed to grayscale the image before sending to textract? Should one also apply brightness/contrast?
I assume Textract was trained with grayscale images - so should the service automatically convert the input images to grayscale?