Legacy ImageMagick Discussions Archive

Hi,
I'm trying to achieve the equivalent of convert.exe input.jpg -level 25%,75% output.jpg

I'm using MagickImage ContastStretch method. Basically it's not working.

Code: Select all

 
           using (MagickImage image = new MagickImage("input.jpg"))
            {
                image.ContrastStretch(new Percentage(25), new Percentage(75));
                // Save image 
                image.Write("output.jpg");
            }

Advice gratefully received.

Martin

contrast-stretch 25%,75% is not the same as using -level 25%,75% in percent. Contrast-stretch clips by percentage of pixels. Level adjusts by percent graylevel. So you are using the wrong function in Magick.NET

You posted this in the Magick.NET forum, but it looks more like Magick++ to me. I don't use either.

Anyhow, as Fred says the constrastStretch() function will correspond to the CLI command "-contrast-stretch". As you want "-level", the level() function seems more likely.

Can't imagine why I didn't see that before! doh
Thanks
Martin

Legacy ImageMagick Discussions Archive

convert -level 25%,75% in Magick.Net

convert -level 25%,75% in Magick.Net

Re: convert -level 25%,75% in Magick.Net

Re: convert -level 25%,75% in Magick.Net

Re: convert -level 25%,75% in Magick.Net