tesseract - Get image size in pixels from DPI (dot per inch) android -


i try minimum image size tesseract, 300 dpi pixel, in android. found this answer tell me how convert dp pixel, seems isn't need, dp = dip = density-independent pixel (correct me if i'm wrong). example, if have image size 1024 x 768 pixels, how can size base on 300 (dpi) dot per inch?

a bitmap doesn't have "inherent" density, resolution (i.e. x y pixels).

an image file may contain information dpis, that's mapping physical dimensions (i.e. printing). example, 800px * 600px image resolution of 96dpi printed 8.33in * 6.25in, while print area smaller higher resolution.

therefore, "pixels dpi" not valid conversion -- it's kind of converting distance speed.

i'm not sure requirements tesseract, if receives bitmap input "processing pixels", don't think 300dpi requirement makes sense -- that's rule of thumb obtain result scanned text of particular (physical) font size.


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