11-01-2017, 09:08 PM
Normally the Color>Brightness/Contrast tool is enough. Increase contrast and perhaps compensate a bit by lowering the brightness.
However, if these come from a scanner, then the Brightness/Contrast control of the scanner software can often do a better job (because it has more data to work with). And if these receipts are shot with a smartphone, the better the shot (good an uniform lighting), the easier it is to work on (otherwise increasing contrast will also increase the defects) but the smartphone camera app may have some brightness/contrast control itself.
For more details, we need a sample receipt (or anonymized extract thereof).
However, if these come from a scanner, then the Brightness/Contrast control of the scanner software can often do a better job (because it has more data to work with). And if these receipts are shot with a smartphone, the better the shot (good an uniform lighting), the easier it is to work on (otherwise increasing contrast will also increase the defects) but the smartphone camera app may have some brightness/contrast control itself.
For more details, we need a sample receipt (or anonymized extract thereof).