Unix and Linux Stack Exchange
Unix and Linux Stack Exchange

Questions tagged [images]

Something related to visual data files

An image in this site's context is something related to a visual data file (as opposed to "a representation of what is in the memory of a running program/kernel")

366 questions
19
votes
5 answers

How do you binarize a colored image?

My friend has an colored image with Chinese handwriting (basically by taking photo of or scanning what he wrote on a piece of white paper), and he would like me to convert it into a black and white binary image. Are there applications under Ubuntu…
Tim
  • 101,790
16
votes
6 answers

Sort images by aspect ratio

I am trying to select a few art images to fit some new frames. I would like to be able to sort these images by proximity to a particular aspect ratio and then view them in decreasing order of proximity through something like feh. Is there some…
Jeff
  • 261
5
votes
3 answers

Exporting from digiKam album view to local filesystem?

In the album view I am able to select multiple photos and have the option to export to many many different types of destinations under the 'Export' menu (Dropbox, Flickr, Google Drive, Imgur, etc.), but I don't see a mechanism to export directly to…
ebpa
  • 201
5
votes
3 answers

displaying page 2 etc of multipage tiff

I have a multi-page TIFF file produced from scanning. When I open the file (Image Viewer), Next goes to the Next image file in the folder not the next image in the file. Is there a hidden option to see each of the images (Ubuntu 13.10). I don't…
user52796
  • 57
4
votes
1 answer

Find Largest Image Dimensions in Folder

I need a command which will allow me to search a folder of images for the images with the biggest width and the biggest height. As of now I'm using XNViewMP to find this info, but I'd like a faster way using a command or a Thunar Custom…
whitewings
  • 2,457
2
votes
1 answer

Detecting "bad" images from the command line

I've restored a huge number of images from accidental formatting of a disk. A great number of these images are corrupted, ie. 100% green or 70% grey. Unfortunately, they all still have EXIF data so I can't offhand use that to sort out which images…
Jan
  • 145
2
votes
1 answer

xv-like image viewer that lets me annotate/mark images?

When I'm viewing many images w/ xv (sometimes in "visual schnauzer" mode), I sometimes want to "bookmark" or annotate a given image. I don't think xv can do this, but is there another xv-like image viewer that can? Is it possible to add…
user2267
2
votes
1 answer

creating image tag for my pictures

I have 3 computers: One runs windows 10, another one runs Debian and the last one act like an NAS. I store my captured pictures to my NAS. What I would like to do more is to add a tag to each photo. I tried to do so from my Debian. I went on…
Buozinis
  • 23
2
votes
1 answer

Sort & organize a huge heap of photos

I have 168307 jpg photos in one folder - result of a recovery from an accidentally formatted hard drive. Casual browsing shows that 80% of files have been recovered ok, most even have valid EXIF data (incl. timestamp), some are partially recovered…
Andy
  • 21
1
vote
1 answer

Native Linux program to comment pictures

I am searching for a native Linux program to comment (tag) pictures. Think of a square on someone's face with text somewhere. I don't want to change the picture (as would be the case with any vector based drawing program), but just manage my…
xyz
  • 742
1
vote
1 answer

Invalid MIT-MAGIC-COOKIE-1 key% WIDGET_CONTROL: Unable to connect to X Windows display: localhost:11.0

I am trying to run IDL from remote in terminal window. I would like to produce an image in a png file from remote without the pop-up window in my terminal (for some reasons that I do not know pop-up window plots do not work well in my computer). I…
Fred
  • 21
1
vote
1 answer

NEF/RAW images too small in geeqie

A while ago I encountered this issue with my favourite Viewer geeqie. My RAW files are displayed too small and I assume it's just the thumbnail which is shown, not the actual image. (It used to work smooth before) There has been a bug…
Qohelet
  • 507
1
vote
0 answers

save transparent web images on linux mint

I have just installed Linux Mint (this is my first day using). I'm using Google chrome and search Google images for a transparent png, for example an icon with no background. I am right click saving as... Here is a screen shot of what happens: The…
8DK
  • 25
0
votes
1 answer

Detecting images containing only black pixels

I am looking for a method for detecting if an image contains only black pixels. When I say method I mean an existing command line tool. I could write up something myself but I'm sure something probably exists already.
iiSeymour
  • 730
0
votes
0 answers

How to visually freeform select and save the part of an image in linux without gimp?

Pretty much as per title: How to visually freeform select and save the part of an image in linux without gimp? In other words how do you freeform select/cut out something from an image and save this cutout/selection. Not cropping, nor cli
jjk
  • 411
1
2