Legacy ImageMagick Discussions Archive

There are many methods for calculating the mean image from a large set, eg all at once, or rolling average, or in batches of say 100, or some combination. How large are the images, in pixels? That determines how many will fit in memory at once. I suggest you start work with small images, eg "-c...

I'm not sure what you want. Your command doesn't shift by 50 pixels because 1 becomes 50 (a shift of 49) but 50 becomes 100 (a shift of 50). See the documentation at http://www.imagemagick.org/script/command-line-options.php#distort : ... if you use the plus form of the operator (+distort) the opera...

As Fred suggests, this can be done with colour matrices, one per input image, then add them together. Something like this. Untested, and add line-continuation characters and escape the parentheses and quote lists as required by your shell. magick ( right.jpg -color-matrix 0.456, 0.5, 0.176 -0.04, -0...

The error message says IM expects the data from ufraw-batch to be in PPM format. Even if it worked, I doubt it would solve your problem. Try reading the DNG as a TIFF, and listing all the metadata: identify -verbose TIFF:RAW_CANON_1DM2.dng Does that list the metadata you want? If not, then IM won't ...

I suggest you use exiftool for this, not ImageMagick.

"mogrify" doesn't take an input filename and an output filename. It takes only one filename.

Why do you "-flatten" the image? I think you don't want that.

The mere act of rasterizing a PDF doesn't calculate whether each page has any colour. You could: This finds the maximum chroma of each page. When this is zero, the page is monochrome.

IM can read PDF images, via Ghostscript. So you could just use *.pdf in your command.

If you want to extract raster images from PDF files, use pdfimages.

That is not a complete but minimal program. I can't paste it into a file, compile and run it.

You have already asked this question, so I have deleted the other one. Please don't multipost. You can always bump threads if you feel the need.

It might help if you showed a complete reproducible example: a full but minimal program, and the input image.

That looks about right. Here's another example, using %[fx:...] so we have fewer magic numbers. %IMG7%magick ^ Bill_Murray.jpg ^ -distort perspective "0,0,0,0 0,%%[fx:h-1],0,%%[fx:h-1] %%[fx:w-1],0,%%[fx:w-1],%%[fx:421-10] %%[fx:w-1],%%[fx:h-1],%%[fx:w-1],%%[fx:421+10]" ^ -filter point ^ -...

What version of IM, on what platform? I assume v7 on Windows BAT. This creates just three palettes, but is easily extended to any number. It takes an input image (toes.png) and remaps it in turn to each palette, and finds how much this has changed ("distorted") the image. It writes the sco...

Step 1 is simply "-crop 8x8". Step 3 is simply "-layers flatten". For step 2, I would prepare palette images. Each would have 8 pixels, for the 8 colours. For each tile, remap to each palette image. Compare the 8 results to the tile, to find which has changed the least. Keep the ...

"-interpolate" is a setting. If you want it to affect the "-resize" operation, you need to put that before "-resize", not after. But "-interpolate" has no effect on "-resize". "-filter" does have an effect on "-resize". For exampl...