Hi Ian, I'm implementing a feature in my program to enable OCR of screenshots. The results have been generally better after the captured images were rescaled from 96 DPI to 300 DPI. I was wondering if other simple manipulations could be done programmatically to the images to produce even better results.
The types of the screenshots are either 32bppArgb or 24bppRgb. Would changing to grayscale or stripping the Alpha help? Quan On Aug 31, 12:17 pm, "Ian Ozsvald (A.I. Cookbook)" <[email protected]> wrote: > Hi Quan. > > I've used tesseract to OCR frames from 640x480 screencast videos, > generally it worked > fine:http://ianozsvald.com/2010/05/17/extracting-keyword-text-from-screenc... > > What problems are you seeing when you try tesseract? > > Ian. > > On 30 August 2010 23:46, Quan Nguyen <[email protected]> wrote: > > > I understand the resolutions of screenshots are typically inadequate > > for OCR, but besides rescaling to a higher resolution, say, 300 DPI, > > what other preprocessing operations may be needed on the images to > > yield optimal OCR results? > > > Thanks. > > > -- > > You received this message because you are subscribed to the Google Groups > > "tesseract-ocr" group. > > To post to this group, send email to [email protected]. > > To unsubscribe from this group, send email to > > [email protected]. > > For more options, visit this group > > athttp://groups.google.com/group/tesseract-ocr?hl=en. > > -- > Ian Ozsvald (A.I. researcher, screencaster) > [email protected] > > http://IanOzsvald.comhttp://MorConsulting.com/http://blog.AICookbook.com/http://TheScreencastingHandbook.comhttp://FivePoundApp.com/http://twitter.com/IanOzsvald -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/tesseract-ocr?hl=en.
