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0answers
23 views

Deleting images all completely black images and files with the same name

I'm working on preprocessing images for a semantic segmentation task and have two folders with identically named images (one of the images in colour, and the other that have been colour coded for the ...
1
vote
0answers
32 views

What does this 'exif:GPSInfo: 8253' mean in ImageMagick identify command?

Totally love the tool and documentation and currently trying to use EXIF data to geotag my own pictures. Just wondering what this exactly means: exif:GPSInfo: 8253 It pops up in the exif section ...
2
votes
0answers
159 views

Create small high-quality GIF/APNG from a bunch of PNGs

I have 50 PNGs (like those ones here) and I would like to create a GIF (or APNG) animation from it that approximately retains the quality and is small. What I'm doing so far is to rescale and throw ...
1
vote
1answer
516 views

Automatically restoring verticality of the edges of a scanned photo

I want to scan a collection of rectangular photos, both color and black-and-white. I am generally quite happy with the scanning, but I run into some practical problems, due to the fact that photos are ...
1
vote
1answer
35 views

How to get convert to not interpolate pixels?

I am using ImageMagick's convert to convert a bunch of .fits files (an image format used in astronomy) to an animated .gif. My astronomical images are pretty low resolution (150 x 300 pixels) but ...
0
votes
1answer
42 views

Replace a certain color of pixels in a png with another png image

I have a png (items.png) which consists of mostly black pixels. I want to replace all the black pixels with another image. (background.png) The images are not the same size, items.png is smaller ...
2
votes
1answer
1k views

Imagemagick 'convert' text to image: ReadTEXTImage: Assertion

I'm trying the following command to convert text to an image: $ echo test | convert text:- text_box_trimmed.png convert: ../../coders/txt.c:198: ReadTEXTImage: Assertion `exception->signature == ...
0
votes
1answer
161 views

Find gif/jpeg files with png extension and convert to png

First command find and list jpeg/gif files with png extension. Second command convert a file to png. find . -type f -name "*.png" | xargs -L 1 -I{} file -i {} | grep -v 'image/png; charset=binary$' ...
2
votes
1answer
58 views

Pack images into PDF

I have many screenshots which were all taken under the same conditions: Same display resolution, same display scaling, PDF viewer at the same size, PDF zoom level the same, etc. They are of different ...
0
votes
1answer
779 views

Bulk Resize images in sub directories with Imagemagick

I'm trying to resize all images in a directory and sub directories. I have this script which I got from here: Use mogrify to resize large files while ignoring small ones and adjusted to: identify -...
1
vote
0answers
59 views

How to split an image with offset using ImageMagic? [duplicate]

I planning to print a large map(6400x15360) and I want to split that image to multiple images(1123x794). I found that -crop 1123x794 do that but How I can add offset so it will be easier for me to ...
6
votes
2answers
200 views

How to find y-axis joint similarity in two pictures?

I want to merge two pictures but I do not know how to find the cut location in y-axis by any Linux/Unix tools, but here ImageMagick as the first idea. Any approach is welcome: a programmatic solution ...
15
votes
2answers
2k views

How to cut image by top 30% in Unix?

I want to cut 30% from the top of the image. I know the thread How to cut a really large raster image into smaller chunks? but there is no successful approach because I cannot find a distance measure ...
2
votes
1answer
38 views

record image effects as animations

I've done only some very basic stuff with ImageMagick (mainly resizing, also messing with color filters a bit). Imagemagick has a simple example for overlaying images: convert anthony_1.jpg ...
7
votes
1answer
358 views

converting pdf pictures to png files makes pictures too small

I'm converting a bunch of pdf vector figures to png files. for f in *.pdf do convert -trim ${f} "${f}.png" done rename 's/\.pdf//' *.png But the dimension of the pictures are too small. The doc ...
1
vote
0answers
469 views

How to open a gif without loop repetition with oeg

I use to open .gif file with eog -f myfile.gif The gif animation is however running in loop. What I want is to display the animation once and then quit. How to avoid this? Please also help in ...
0
votes
1answer
1k views

Change default image viewer

# ... def show(): """ Show image """ t = Twitter(auth=authen()) try: target = g['stuff'].split()[0] if target != 'image': return id = int(g['...
1
vote
1answer
34 views

Using convert to create JPGs?

When I use convert image.png image.jpg to convert a PNG to a JPEG, does convert perform any lossy compression? How much?
1
vote
0answers
526 views

To Adjust Brightness-Contrast in Plane with Gimp/ImageMagick/…?

This kind of plane is a common tool used to view Rontgen pictures in Radiology. It exists as a standard in many RTG programs in hospitals. I would like to have a similar tool open-source for ...
2
votes
1answer
221 views

Silhouette from an image

How can I create silhouette from an image in linux using the terminal? By creating silhouette I mean - how do I turn the RGB components values of an RGBA image to #000000, while preserving the alpha ...
1
vote
0answers
79 views

How to preserve clearness while converting jpg to pdf file?

I would like convert a jpg file (a photo taken of two pages of a book) to a pdf file, with the goal of making the pdf file look like pages of a regular ebook file in terms of page size and ...
4
votes
4answers
342 views

Programmatically determine “uniformity” of image

I'm attempting to write a script which thumbnails our many thousands of assets. The assets use Flash for the most part, and I'm capturing them via chromium-browser on the command line. I pretty much ...
4
votes
1answer
2k views

Stop ImageMagick from rotating image on append

I took two photos with my phone, one horizontal and one vertical, and they show up fine in Eye of Gnome. When I try to glue them top-to-bottom with ImageMagick's convert: $ convert img1.jpg img2.jpg ...
1
vote
1answer
205 views

How to use ImageMagick's convert to rescale an image, adding letterboxing to produce a fixed size result?

I have some arbitrarily-sized images for which I want to produce fixed-size 800x600 thumbnails, which keep the original image ratio and add white letterboxing to make up the rest of the space. I'd ...
2
votes
1answer
558 views

Cropping images using ImageMagick results in all output files (TIF) of same size?

I am scanning a rare old book (cookbook) for archiving using my Canon LiDE 110. The scans are .TIF files, and I want to batch crop them for uniformity, et cetera. This is how I am doing the batch ...
0
votes
0answers
521 views

Metadata preservation when modifying images with ImageMagic

I want to resize, convert or resize + convert images in JPEG, PNG and TIFF in each direction: jpg → tiff, tiff → png, etc. And I want to use -flatten as well. What does ImageMagick do with the ...
0
votes
1answer
406 views

Imagemagick mogrify with shadow geometry

How can I specify the size of a shadow with imagemagick? This command works: montage foo.jpg bar.jpg foobar.jpg -background lightgray -geometry 1031x1642+57+57 -shadow -monitor -tile 3x1 out.png ...
2
votes
1answer
521 views

How to extract comment from ppm file?

I have ppm file X.ppm with comment : xxd X.ppm|head -10 0000000: 5036 0a23 206d 6967 6874 796d 616e 6465 P6.# mightymande 0000010: 6c20 2d32 2e38 3034 3132 3232 3037 3833 l -2.80412220783 0000020: ...
18
votes
3answers
17k views

How to split an image vertically using the command line?

Say I have a large 800x5000 image; how would I split that into 5 separate images with dimensions 800x1000 using the command line?
6
votes
2answers
932 views

Ways to convert and combine image files into a pdf file?

I have about 190 image files (png and jpg) in a directory. For more information, each image has 2500 x 3072 pixels, and about 500KB. I use the command convert from ImageMagik to convert and combine ...
2
votes
1answer
133 views

Sorting image files based on whether the content is picture or graphics: updating an older solution?

Someone wanted to sort files in a directory according to whether the files are pictures(camera) vs. design graphics. On Stackoverflow, there is an older solution/proof-of-concept involving the ...
10
votes
1answer
3k views

Combine multiple PDF files into one (arranged in a matrix)

Having a set of PDF files, lets say: in-01.pdf, in-02.pdf, in-03.pdf, ... I would like to combine all of them into a single one, forming an M x N matrix. The command montage allows for doing so (M ...
0
votes
1answer
1k views

How can I make a montage which seamlessly tiles the same one image file?

I would like to preview how one single image (768x1024 px .tiff) would look as a pattern by generating an output file where it is tiled in such and such a way (4x4, 5x5, etc.). The image should be ...
1
vote
1answer
901 views

Merging pairs of TIFF files in a directory

For example, say a given directory has 1000 TIFF files named sample1.TIFF, sample2.TIFF, etc., all the way to sample1000.TIFF. I want to merge each pair of files: sample1.TIFF and sample2.TIFF are ...
4
votes
1answer
2k views

Imagemagick: set IPTC parameters in jpeg image

With the Imagemagick command $ identify -verbose image.jpg so many properties of the image are shown. For example, in the output I can find Profiles: Profile-8bim: 1058 bytes Profile-iptc: 1017 ...
8
votes
1answer
7k views

ImageMagick (or other) for UTF-8 text to image

I'm trying to create many single-character images using convert. The purpose is to provide a plastics specialist with images to print onto keyboard keycaps. The ImageMagick documentation suggests ...
7
votes
3answers
2k views

How to rescale several images to same size

I have several image files in a directory. These images are similar size and have same background color. How can I make all images same size by adding background like this attached image?
1
vote
2answers
10k views

Convert image with imagemagick command line convert tool

I have an image Image.png. How do I use the ImageMagick command convert to make this file into a Image.jpg file with the following requirements: File size is 200~500 kb. Resolution in not less than ...
3
votes
1answer
11k views

Imagemagick used to generate PPM's in Linux, PPM's are unreadable

I need to generate PPM's as raw data sources for one program. I have a bunch of png's as Input, which I'm going to convert ppm's. When I try a tool like mogrify it generates files, but these are ...
54
votes
9answers
34k views

Command line convert webp to jpg?

I'm using ubuntu 12.04. I've installed libwebp2 & libwebp-dev So far, no example found on the net of converting webp to jpg. Some webp files can easily converted by using imagemagick with ...
1
vote
0answers
214 views

Gigapixel Panorama not loading after converted with imagemagick

I made a 3GB tif panorama, but as 3GB is a too big size to open in a computer with a 3Gb RAM, i converted it to JPG convert input.tif output.jpg The result was a 15Mb(?!?) JPG, which i am unable ...
4
votes
1answer
2k views

Resize a very tiny xcf image without blurring or dithering it

I have some drawings I made with an Intuos tablet. All of these drawings are 25x35 or so. The color of each pixel was very carefully selected. They're kind of like 'miniatures.' I need to resize ...
12
votes
2answers
2k views

How to generate a lot of (blank) images files?

For a test, I need to quickly create 1700 jpg-images (even blank) in a defined size 1000x706. I wonder if we could do this with a shell script or a program (like ImageMagick). I wish they called img_0....