Error “-gamma” in command line options documentation of K2PDFOpt

JaapV · 04-15-2024, 09:35 AM

Recently, I tried to make a PDF lighter that I had run through K2PDFOpt for my Pocketbook, because the result was much darker than the original. So, I came across the command line options file on https://www.willus.com/k2pdfopt/help/options.shtml . Under the heading of “-mode <mode>” it says: “If you want a perfect copy, do this: -mode copy -gamma 1 -s- -cmax 1”. So I tried that; didn't work. I did get “-gamma 1” in the file list of K2PDFOpt's GUI, though. Huh? I looked further and found out that you have to give K2PDFOpt “-g” instead of “-gamma”. Then, the option worked, and with “-g 1.5” I got just the right amount of lightening up of the result file.

I don't know how long this documentation error has been there, but I guess it's years. I've been using K2PDFOpt years ago, and it was already present then. So, I tought I'd mention it. As I couldn't find an appropriate forum, I chose the “PDF” forum to post in.

Regards, Jaap.

willus · 04-20-2024, 07:05 PM

Yes, that's probably been a documentation error for a long time. Thanks for pointing it out. I'll fix in the next release.

04-15-2024, 09:35 AM	#1
JaapV Junior Member Posts: 1 Karma: 55000 Join Date: Apr 2024 Device: Pocketbook Touch Lux 5	Error “-gamma” in command line options documentation of K2PDFOpt Recently, I tried to make a PDF lighter that I had run through K2PDFOpt for my Pocketbook, because the result was much darker than the original. So, I came across the command line options file on https://www.willus.com/k2pdfopt/help/options.shtml . Under the heading of “-mode <mode>” it says: “If you want a perfect copy, do this: -mode copy -gamma 1 -s- -cmax 1”. So I tried that; didn't work. I did get “-gamma 1” in the file list of K2PDFOpt's GUI, though. Huh? I looked further and found out that you have to give K2PDFOpt “-g” instead of “-gamma”. Then, the option worked, and with “-g 1.5” I got just the right amount of lightening up of the result file. I don't know how long this documentation error has been there, but I guess it's years. I've been using K2PDFOpt years ago, and it was already present then. So, I tought I'd mention it. As I couldn't find an appropriate forum, I chose the “PDF” forum to post in. Regards, Jaap.

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04-20-2024, 07:05 PM	#2
willus Fuzzball, the purple cat Posts: 1,283 Karma: 11087488 Join Date: Jun 2011 Location: California Device: iPad	Yes, that's probably been a documentation error for a long time. Thanks for pointing it out. I'll fix in the next release.