ImageMagick | source software suite | Computer Vision library

I want to split some images by percentage using ImageMagick. To be more precise, I want to split an image into two images. The output-image of the left side should be 55% of the left side of the original image, the output-image of the right side should be 55% of the right ride of the original image.

(In case I am not making myself clear: The point is that there is sometimes important information in the middle of the images and this information would be cut off if we split the images exactly in the middle.)

What I have so far is this: mogrify -crop 55%x100% +repage -path ./cropped *.jpg

So at the moment, I am splitting the image into two and saving it in the "cropped"-folder. BUT, only the left side is 55% of the left side of the original image, the right side is 45% of the right side of the original image.

As this is my first time working with ImageMagick, I would really appreciate your help!

I am trying to use ImageMagick 7 to detect if a specific channel in an image is largely pure black and pure white (plus a little antialiasing, and there's a chance the image could be pure black). This is to distinguish from another kind of image that shares a naming convention but has photographic-like image data in the r/g/b channels.

(Basically both image types are specular maps from different engines. The one I'm trying to differentiate here is more modern and has the metallic map in the blue channel; the other is much older and just has the specular colour in the RGB channels and the gloss map in the alpha.)

Currently I'm comparing the channel to a clone of itself that has had a 50% threshold applied, using the AE metric to see if it's largely the same apart from a small amount of antialiasing, and a fuzz of 1% to account for occasional aberration from pure black/white. This command works, but of course at the moment it only returns the number of distorted pixels:

How do I combine the following ImageMagick command line commands into a single instruction:

I have a raw image that was taken with v4l2-ctl after the camera had been setup like:

I'm trying to deploy an application I wrote to my unraid server so I had to docker-ize it. It's written with nodejs and depends on imagemagick and ghostscript so I had to include a build step to install those dependencies. I'm seeing an error when running this image though

Here's my dockerfile

I have an image and I want to fill with some color (e.g. blue) parts of that image which are outside of a rectangle. Position of left upper corner and width/height of this rectangle relative to the left upper corner of the original image are known.

Here borders of the original image are in red and borders of the rectangle are in black. Blue area should be filled.

How can I do this? I tried to create a tmp image and use a mask but it seems to also fill transparent regions inside the rectangle which is not what I want.

Also, there is probably a way to do it without creating intermediate images? I'd be interested in both options though, because I'm not sure how requirements will change over time -- maybe in the future I'd have to apply some other shape (not a rectangle), so having a way to apply an arbitrary mask would be better in that case.

Example:

• image:

• coordinates of the rectangle (assuming x axis runs from left to right, y axis from top to bottom, with (0,0) being left-upper corner of the original image):
  • left-upper corner (117,-24)
  • right-bottom corner (1117,1676)

I'm trying to create an bunch of images that are very simple, just a string on a white background.

I would like the string to be located at a random position in the image, around the center and so that the whole string is visible (i.e. none hidden outside the image limits).

The strings are generated automatically, so I don't know their length beforehand, I just know they will be within a given range of lengths (6 - 15 chars).

For this I'm working with imagemagick's convert, and this is what I got atm:

I need to resize any given image to 1200x700px without distorting it, no matter if the image is smaller or bigger. its okay when something gets cropped.

is it possible to do this in a simple way or do i need a lot of if/else to get there?

what's the best approach using imagemagick (command-line)?

Is it possible to crop equally sized tiles using GraphicsMagick, similar to ImageMagick's crop "@" modifier?