Legacy ImageMagick Discussions Archive

Hello, I'm trying to pass the filename of an image as argument to my program and use it with MagickReadImage and then to re-write the image with MagickWriteImage.

When I print the argument the path is fine

printf("argv 5 %s\n",argv[5]);

gives

argv 5 ../Imagenes/Clase 1/barleyrice001-inca ...

Thx Anthony!

And how can I change the image to grayscale?

Hello I have an image that is mostly yellow and I tried to turn it into a grayscale image by using this.

MagickQuantizeImage(image_wand,256,GRAYColorspace,0,MagickFalse,MagickFalse);

and it worked the image turned into grayscale and I saved it as a new file.

I later used that same file but now ...

Managed to do it with this
Thx!

Hello Pete, thanks for the reply.

I tried that but when I save the image to disk it is exactly the same as it was before, the colors didn't change.

Hello, :)

I'm fairly new to ImageMagick and I am wandering if there's an easy want to convert a normal RGB image to Grayscale. What I need to do is read the image from a file convert it into the grayscale version and write it back. Is there any MagickWand methods to do this. I've been looking ...