ImageMagick should let you set intended resolution.
Sven

On Friday, January 11, 2013, newbie wrote:

> Hello experts,
>
> I am trying to scale the original image larger by pixScale function of
> Leptonica for the input of Tesseract OCR, however, I see that the
> resolution of dest image is increased as well. For example,  I have pix
> with 300DPI, but the if I scale to 3x, then the dest image's resolution
> will be 900 DPI. I have no idea if it is good or bad as I think 300 DPI is
> good enough.
> Could you please advise me which is the best solution for input image for
> Tesseract?
>
> Thanks.
>
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