I'm working on a document storage project and i found a problem.After converting/compressing a scanned document to black & white sometimes, some areas of the document are unreadable because shadows are transformed to black chunks.Is it possible to find out when this black chunks are present on the images?the intuiton of this validation is to mark the file as unreadable to manual analisys.
detect blurred zones after conversion to black & white
algorithm;transformations;optimisation;blur