Legacy ImageMagick Discussions Archive

This entire thread can be deleted. All of the useful information is in this thread in the Developers forum.

Okay, that is a start. To use your example, you begin with a 2375x2500 image. I do not understand which conditional case it falls under? I do not understand what exactly you want done?

I think Bonzo read your post as asking to place an image on a larger background canvas, which is understandable since you spoke of a canvas and gravity. If this is what you want, your canvas would need a color. If you do not want a background canvas, what do you mean by gravity? Again, are your init...

I recently had a post about translating GIMP's Unsharp Mask to IM's -unsharp. I determined: im_gain = gimp_amount im_sigma = ( gimp_radius + 1 ) im_radius = 2 * ( gimp_radius + 1 ) except it was closer to + 0.9 than + 1. Maybe this is related? I think those tests were using 6.8.6-3. That post also n...

Do you want the images resized (resampled), or are you wanting a border added? A colored border, or a transparent one? Are your initial images always square?

This could be done using only IM, but a script may be easier and more readable.

I'm with snibgo. When you create text on it's own layer, endless distortion options are available. label: is an alternative to -annotate.
http://www.imagemagick.org/Usage/text/

Why remove it? Are you looking for privacy or to save disk space? I believe the latest Photoshop reads the EXIF data to automatically load lens correction settings. My cheap digital camera isn't supported and doesn't support raw or interchangeable lenses, but I can use focal length to get reasonable...

I did some testing for GIMP Radius = 0.5 - 6 and Amount = 1 - 6. I have determined that GIMP Amount is exactly the same parameter as IM Gain. IM Sigma is GIMP Radius plus not quite one, and IM radius is twice that. I find it strange that GIMP calls a parameter radius when pixels 2*(radius+1) distant...

If you use it, it is useful. I do sometimes look at the EXIF data when deciding how to adjust a photo, although never in an automated way. I also use it in learning how to take better photos in the future. There are tools that will take a jpeg and automatically rotate it, optimize the compression, a...

That supports im_sigma = gimp_radius + 1? But if the range of gimp_radius is 0.1-500.0, then the range of im_sigma would be 1.1-501. What is a generally useful range for im_sigma?

Does anyone know how to translate the parameters from GIMP'S Unsharp Mask to IM's -unsharp operation? IM's unsharp operation has the parameters radius, sigma, gain, and threshold. http://www.imagemagick.org/script/command-line-options.php#unsharp radius (default=0 to calculate based on sigma, rarely...

so there is no a regular command-style solution for that? I don't know of one. The simple solution is to use a hald color look-up. This would let you apply your color modification to one or many images. The down side is that a color look-up file must be created by hand using PS for each set of para...

Some PS color modifications can't be reproduced using -hald-clut. Others can be perfectly reproduced with a simple -clut. GreenKoopa, does hald 16 provide better accuracy? You mentioned slight differences, and interpolation is the source of the difference. hald:x creates an image with x^6 color samp...

but there is no setting that will convert a png to a pdf of more than one page? Not that I know of. ImageMagick is not specifically a pdf or page layout tool. My example created a png of the size you gave, then created a pdf with that image split over 3 pages. It's not a setting, but it accomplishe...

The -hald-clut method you mentioned totally solves my problem! The resulting image is just about spot on the same as when I process it within photoshop using the curves preset. I compared the PS and -hald-clut IM version within the histogram, and although slight differences it seems to be very clos...