I have used ghostscript on a PDF document with text. Text looks like black and white map of bits. How can I get the image with readable text?
-r96
-dTextAlphaBits=1
-sDEVICE=png16m
You can use the higher resolution for your output image, say -r300 set -dTextAlphaBits=4 and -sDEVICE=pnggray
-dTextAlphaBits=n
-dGraphicsAlphaBits=n
These options control the use of subsample antialiasing. Their use is highly recommended for producing high quality rasterizations of the input files. The size of the subsampling box n should be 4 for optimum output, but smaller values can be used for faster rendering. Antialiasing is enabled separately for text and graphics content.
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