| | <<<Back 1 day (to 2017/05/12) | 20170513 |
| sven337 | I want to use ghostscript to generate CMYK planes to send to a printer. What's the best output device to get correct rendering? foo2hbpl currently gives me a terrible moiré effect and I haven't yet determined if it was ghostscript's fault or the software downstream | 15:25.22 |
| | but I've noticed that ghostscript isn't really outputting the right "amounts" of ink (colors are oversaturated), so I suspect that it might also be responsible for the moiré effect | 15:25.51 |
| alexcher | sven337: color correction and halftoning methods should be tuned to match the printer. The best approach is to send a continuous tone document to the printing company and let them take care of such details. | 17:59.13 |
| sven337 | sorry I was unclear, I'm not sending a document for printing to a company that has a fancy printer, I have a color laser printer at home for which i'm trying to generate CMYK planes that look good when printed | 18:00.28 |
| | the printer "works" with foo2hbpl2, but the halftoning is readily apparent on the sheet (appears as clearer bands) and the print quality is terrible | 18:01.12 |
| | I don't know what the Windows driver does, but it doesn't have that problem, so I'm hoping to convince ghostscript to give me a CMYK image that looks better | 18:01.44 |
| alexcher | sven337: tuning a RIP to support a new printer is a long process. You need to have a right halftone and a right color rendering dictionary. | 18:12.48 |
| | sven337: You can generate CMYK planes on Ghostscript using pdfcmyk device, but I doubt it will help/ | 18:14.59 |
| sven337 | the existing driver, foo2hbpl2, generates CMYK planes with bitcmyk, and manages to print in color | 18:18.16 |
| | but the halftoning pattern is visible (first problem) and the color rendering is completely wrong (second problem) | 18:18.33 |
| | I'm not hoping to get perfect prints out of this printer, I can do that with the Windows driver, but I'd like to see what I can do to make them not suck completely | 18:18.54 |
| | any suggestions? | 18:18.58 |
| | I have .icm files from the windows/mac driver, I'm hoping that can help at least a bit, although I guess these don't define halftone patterns | 18:58.18 |
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