[Gimp-user] extract text in a rectangle from a jpg file

[powah]

My image is 640 x 512 pixels & X Y resolution are both 300 pixels/in.
How to improve the image so that the OCR programs will recognize the text better?
I try the "Scale Image" menu with different values of pixels & X Y resolutions
(e.g. 1920 x 1536 pixels & X Y resolution are both 1200 pixels/in) but does not
seem to improve the result.