Sorry it took a while. Take a look here <https://willus.com/blog.shtml?tesseract_accuracy>.
On Sunday, February 27, 2022 at 9:08:32 AM UTC-8 zdenop wrote: > Hello Willus, > > Can you also test tesseract 5? Can you share your input data for testing > or script for evaluation, how you generate output charts? > > Zdenko > Dátum: pondelok 31. decembra 2018, čas: 23:23:39 UTC+1, odosielateľ: > [email protected] > >> So I did some more experimenting and convinced myself that the "xres" and >> "yres" values in the PIX structure passed to Tesseract have virtually no >> impact to the results unless the resolution is so poor as to make the error >> rate very high. Using that information, I re-ran my tests in a more >> systematic way on both Tesseract 4 (with the "TessBest" English training >> data file--14.7 MiB) and Tesseract 3.05 (with CUBE). The results below >> show the average error rate for the six fonts and then excluding >> Bookman-Demi and Helvetica-Narrow since they're a little out of the >> ordinary. The error-rate is plotted against the height of a capital letter >> in pixels, as before. A couple of things to note: >> 1. Tess v4.0.0 does far better at the lower resolutions (fewer pixels in >> a capital letter). >> 2. Tess v4.0.0 is more consistent across a broader font selection than >> Tess v3.05. This is very good to see. >> 3. However, if I exclude Bookman-Demi and Helvetica-Narrow, Tess v3.05 >> does better for the higher resolutions (40-140 pixel heights). Tess v4.0.0 >> definitely has a consistent issue with high-res fonts which should be >> addressed, as I stated in my earlier posts. >> >> 6-font average: >> [image: tess_accuracy_6fonts.png] >> >> Without Bookman-Demi and Helvetica-Narrow: >> [image: tess_accuracy_4fonts.png] >> >> >> >> >> >> -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/647bdd8a-28bc-4111-bb36-bc8560a78d18n%40googlegroups.com.
