Offering tips would be easier if we knew what kind of errors you're getting...Personally I'm be interested as I'd like to improve my screencast-reader at some point. i.
On 2 September 2010 01:22, Quan Nguyen <[email protected]> wrote: > They are just basic 96-DPI window screen prints, such as those > generated by Print Screen key. I've implemented the function by merely > rescaling the images to 300 DPI, but just wonder if any more > improvement is possible with only minor preprocessing. Any tips would > have been appreciated; but otherwise, I'm OK with the improved results > from the rescaling. > > Thanks for your response. > > On Sep 1, 3:56 am, "Ian Ozsvald (A.I. Cookbook)" <[email protected]> > wrote: >> Re. your questions - I don't know :-( >> >> For my videos I took 640x480 FLV screencasts (from ShowMeDo.com - >> pretty high quality videos with hardly any artefacts) and I ran >> tesseract 2 on the colour screengrabs without rescaling. >> >> What resolution are you capturing at? >> >> If the fonts are small you might want to manually try to sharpen the >> image, in case anti-aliasing/smoothing is blending adjacent characters >> into one another? You could visually confirm if this looks to be the >> case. >> >> Maybe you could upload a sample screengrab and explain what it gets >> right and which errors it gets (maybe by drawing on the image)? >> >> i. >> >> On 1 September 2010 03:26, Quan Nguyen <[email protected]> wrote: >> >> >> >> > 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.... >> >> > -- >> > 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. > > -- Ian Ozsvald (A.I. researcher, screencaster) [email protected] http://IanOzsvald.com http://MorConsulting.com/ http://blog.AICookbook.com/ http://TheScreencastingHandbook.com http://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.
