AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Imagemagick combine gifs3/27/2023 ![]() ![]() Here they are cropped to a minimum common size, the extra pixels discarded. ![]() If the images in the gif are of different size you may want to do something about that. Cropping a set of images to the same size and animating them convert *.png -gravity south -splice 0x111 -shave 0x111 -resize 400x400 -set delay 300 output.gif convert calls up one of the ImageMagick commands, *.png an expression using wildcards to match all png images in the current folder -gravity south aligns the next command(s) bottom -splice 0x111 because I need to remove 111px from the top of the image (that's the Chrome toolbar on a Mac - different values would apply for different situations), it turns out to be easier to add the same amount to the bottom, then deal with top and bottom as one with the next command -shave 0x111 This removes 111px from the top and bottom -shave is easier to work with than -crop -resize 400x400 now i can resize so that the image does not exceed 400 px either direction -set delay 300 adds a three seconds delay between all images output.gif that's it - because a list of images and a delay were supplied, ImageMagick automatically converts to an animated gif. If instead you’d rather create an animated gif, here’s the simplest way to do it - without any of the powerful options that ImageMagick offers. jpg Combining images into an animated gif From now on carry on as for previous command -splice 0x10 add a 10px vertical border to each image -background "#ffffff" make that border white (using HTML color ocde) -append combine images vertically - use +append to combine them horizontally -crop -0+10 crop the top 10 pixels from the combined image, as we want the borders only between images output.png this is the result image file. convert *.png -gravity south -splice 0x111 -shave 0x111 -resize 400x400 -splice 0x10 -background "#ffffff" -append -crop -0+10 output.png convert calls up one of the ImageMagick commands, convert *.png an expression using wildcards to match all png images in the current folder -gravity south aligns the next command(s) bottom -splice 0x111 because I need to remove 111px from the top of the image (that's the Chrome toolbar on a Mac - different values would apply for different situations), it turns out to be easier to add the same amount to the bottom, then deal with top and bottom as one with the next command -shave 0x111 This removes 111px from the top and bottom -shave is easier to work with than -crop -resize 400x400 now i can resize so that the image does not exceed 400 px either direction. This time you can’t use the shortcut resize. ![]() If you have, say, a bunch of screenshots with the address bar etc at the top, you need to modify the command to get rid of it first. jpg Removing window artefacts from the top of the images first convert *.png -splice 0x10 -background "#ffffff" -append -crop -0+10 output.png convert calls up one of the ImageMagick commands, convert *.png an expression using wildcards to match all png images in the current folder, and resize each as it is read so that neither width and height are greater than 400px -splice 0x10 add a 10px vertical border to each image -background "#ffffff" make that border white (using HTML color ocde) -append combine images vertically - use +append to combine them horizontally -crop -0+10 crop the top 10 pixels from the combined image, as we want the borders only between images output.png this is the result image file. This is useful for combining a few images into a single vertical strip, with a 10px white border between each image, like the portrait photos from photo boots. Combining images vertically with a line separating them ![]()
0 Comments
Read More
Leave a Reply. |