16.0

Preprocessing Images 35
appearance. If characters are thick and touching, lighten the
brightness. If characters are thin and broken, darken it. Use the
OCR Brightness tool to optimize the image.
Image Enhancement Tools
The Image Enhancement tools can also be used to edit images to
save and use them as image files. Note that some these tools work
on the Primary image, others on the one used for OCR (OCR
image). Click the Primary/OCR Image button in the Image
Enhancement window, to see the current state of either image.
The Image Enhancement window has two panels. The left panel
shows the starting image. Your changes are shown in the right
preview panel. When you click Accept, the right image is moved to
Unsuitable
Tolerable
Good
Best
Good
Tolerable
Unsuitable