Something related to visual data files

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4
votes
4answers
175 views

easy-to-use image-editing FLOSS

I'm looking for recommendations for something easy to use that will allow me to edit my images. I fiddled with Inkspace and GIMP and found them not so intuitive (I don't want to have to read a manual ...
3
votes
1answer
93 views

How to draw a single pixel in a terminal?

Until now I used characters to draw images, shapes etc in a terminal. Is it possible to draw a single pixel? Let's say: foo 1 1 red This will draw a red pixel at the coordinate (1, 1). Is there ...
1
vote
1answer
464 views

Capture raw image from V4L (webcam) device

I'm using a Raspberry pi to monitor a self-service fridge. When the door opens, a shell script is being executed to capture pictures until the door closes again. The problem, however, is the speed of ...
0
votes
2answers
134 views

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 ...
3
votes
1answer
29 views

Copy image from clipboard to file

Is it possible to take an image from the clipboard and output it to a file (using X)? I can do this with text easily: $ xclip -selection c -o > file.text But when I try the above with an image ...
3
votes
1answer
105 views

Converting and rescaling a lot of png images to jpeg

I have a lot of .png images in a folder. Is there a command (or software) that can convert all them to .jpg and (simultaneously) rescale the created .jpg files to 25% of their original size?
1
vote
1answer
32 views

Conversion from PNG to EPS

I would like to convert PNG images/graphs to EPS without losing even a bit on resolution. All the commands I tried (potrace, autotrace, convert, gimp) decrease the resolution quality.
5
votes
2answers
381 views

renaming images to include creation date in name

When I look at the properties of an image, I can see the date the photo was taken in "Date Taken". When I edit the images (proprietary program) this data gets lost. How can I rename the image files ...
3
votes
1answer
788 views

How to extract files from uImage?

Buildroot is generating Images for an embedded device where they should run on. This is working very well. In those Images the rootfs is included. Due to some research I'd like to look into that ...
0
votes
1answer
95 views

How to display a .jpg file using fbi in a bash script for set amount of time and then execute the next command in the script

I am trying to use fbi in a bash script to display a series of .jpg images. But once fbi begins its process, it continues to cycle through the images and I only want to display each image once for a ...
1
vote
0answers
45 views

Using wget to dowload images in facebook conversations

This look a bit harder than usual. I'm a new wget user and i was thinking that maybe it's possible to somehow login into facebook and download images from a specific conversation. I mean, i'd like ...
1
vote
1answer
43 views

gphoto2 hook scripts - a guide?

I posted this on raspberrypi.stackexchange but was directed here. I'm new to Linux / Unix, and I'm trying to get a tether / display script going with gphoto2. gphoto2 --capture-tethered ...
2
votes
3answers
2k 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 ...
2
votes
0answers
25 views

Image set compression

Is there a good open source (not exclusive to Linux) for compression of a set of similar images? I have thousands of documents scanned but I do not access them often. The documents are forms, with ...
1
vote
2answers
241 views

How to get JPEG thumbnails quickly

My camera is very basic (understatement), but it does have one notable feature: its thumbnail mode is impressively fast; it loads a screenful of 9 thumbnails in less than a quarter of a second. Now, ...
0
votes
3answers
167 views

Why does boot from SD card with my custom kernel result in “VFS: Cannot open root device”?

I'm using an embedded board ARM9 SAM9G25. I want to boot from SD card. When I build a linux kernel with a built-in rootfs (initramfs) then it boots. I want to separate the kernel from rootfs and I ...
2
votes
2answers
33 views

How can I automatically create a document that allows me to compare a list of 4 .png files side-by-side?

So I have a list of 4 .png files, and I'd like to auto-pipe this to some document that puts them all side-by-side for easy comparison. I'm thinking of automatically putting them in a HTML file. So ...
2
votes
1answer
41 views

Apply image perspective through batch mode in gimp

I need to perform image perspective operation from command line? Is there any place where documentation is provided properly. I have asked this question on stack overflow, you can check here. If any ...
1
vote
0answers
44 views

pdf viewer for text documents saved as images — bad rendering

The situation I have in mind is a .pdf document obtained from a scan, or at least such that some readers view it as an image (as opposed to text) and render it badly (see the screenshot below) My ...
1
vote
1answer
276 views

Delete all jpg in a folder that are smaller than specific width/heigth [duplicate]

I have restored with photorec about 7.500 jpg's. I have moved them all in one folder. A big portion of them is thumbnails. But i can't just go on and delete lets say all of them that are smaller than ...
6
votes
5answers
1k views

Find images by size: find / file / awk

I've been trying to find png image files a certain height (over 500px). I know that file will return image dimensions. Example: $ file TestImg1a.png TestImg1a.png: PNG image data, 764 x 200, ...
4
votes
1answer
81 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 ...
1
vote
1answer
1k views

How to put a background image on GRUB?

I found some images on the internet about some GRUBs with a background image, I would like to do something like that too, but how? I have GRUB2.
4
votes
1answer
194 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 ...
3
votes
1answer
147 views

How can I preview the GRUB2 boot screen?

I've been reading a tutorial that shows how to set the background image that will be displayed behind the GRUB2 boot options menu. However, I am concerned that the text might not be visible against ...
2
votes
6answers
233 views

Can I see images and watch movies inside the terminal emulator

Can I see images and watch movies inside the terminal emulator? In case of virtual console I can do it via framebuffer, but what about terminal emulators?
3
votes
1answer
334 views

PNG viewer that can display text chunks metadata

Is there a PNG viewer that can display text chunk metadata? Ideally, I'd like a way to view arbitrary chunks.
5
votes
3answers
287 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?
6
votes
4answers
14k views

What is the fastest way to view images from the terminal?

The terminal is very fast and convenient way to quickly access directories and files (faster than find and click on the directory). One thing that it cannot show in text-mode is "pictures". What ...
2
votes
1answer
152 views

How can I extract images from a pdf file? [duplicate]

I have a pdf file that consists of an image per page. Are there any command line programs that can extract these images?
2
votes
2answers
281 views

Command Line Photo Organiser Like Shotwell but to run on headless server

Does anyone know of a program (or even bash script) that can take photos from various folders and then consolidate them into one place and organise them into a directory structure by date in the way ...
10
votes
6answers
239 views

Options to show images when on the console

When I am on the console (the tty, the virtual terminal, which you reach with Ctrl+Alt+F1-6, not a terminal emulator), what options do I have to view images, tiff, whatever that's not text?
1
vote
1answer
187 views

I want to understand Buildroot - the 3 compression config options (kernel, initramfs & rootfs)

I'm using buildroot to generate my images and for sure there is the option of compression with the help of different methods (LZO, LZMA, gzip, ...). So far i found these 3 compression options in ...
0
votes
3answers
835 views

shell command to get pixel size of an image

Is there a shell command that returns the pixel size of an image? I'm trying to produce an animated gif starting from different gifs with different sizes using convert (e.g. convert -delay 50 1.gif ...
3
votes
3answers
513 views

How to batch convert bitmaps to SVGs?

I have many gray scale bitmaps that I need to convert to a vector format, such as SVG. I have been using Inkscape, which gives nice results, but this takes about 10-15 minutes to open, convert, and ...
9
votes
1answer
3k views

Open source duplicate image finder for Linux?

Is there a free and open source duplicate image finder for Linux based systems? Finding exact duplicates (based on content, not file name) is sufficient for me, but the ability to find similar images ...
1
vote
2answers
608 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 ...
6
votes
2answers
649 views

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 ...
0
votes
1answer
45 views

Is it possible to display a static image on VNC connections?

Recently, I've been getting semi-regular VNC connection attempts on my computer. It's most likely from the domain I set up a while back, but it appears to be mostly individual connection attempts, as ...
3
votes
4answers
348 views

Are there any multiformat image viewers, which are similar to feh and can show SVG files?

At the moment I'm working with a lot of SVG files and I don't have a good tool to inspect this files. Normally I use feh to take a look at an image, but feh can't show SVG files. Now I'm looking for ...
8
votes
1answer
801 views

How to store an image file in bash variable?

After I use the following command, pngString="$(cat example.png)" echo -n "$pngString" > tmp.png I can't open the tmp.png as a PNG file. Maybe some information is lost when I use $pngString ...
4
votes
1answer
80 views

How to change the backgrounds in isolinux

I've been messing with this problem for a while now, and it seems like there isn't much documentation, or people who have asked about this before. I've been trying to change the back640x480.jpg, ...
1
vote
3answers
745 views

Save image as 24 bit png

Is there a way to save an image as 24 bit png? I didn't manage with GIMP. Keep in mind this is pixel art so keeping the exact colors are important. I tried several things in GIMP, but it always said ...
2
votes
1answer
482 views

Compare video and image (percentage of differences)

I was wondering if it's possible to get the percentage of difference between a video and an static image using avconv (from libav) I have a surveillance camera constantly providing an RTSP video ...
0
votes
1answer
67 views

Loss of .eps file quality after using scp to transfer from remote server

When I scp (secure copy protocol) a .eps image file (generated using IDL) from a remote server to my desktop, the image seems to be of a lowered resolution and "choppy". Strangely, when I transfer ...
1
vote
1answer
1k views

open corel draw files on debian

So I have .cdr files on my PC and I want to open them on my Debian 7 box. What software do I need to be able to open it?` I have: 512 MB RAM 3 GHz processor 256 MB graphics with Debian 7
1
vote
0answers
24 views

Linux display server or program that can route video and/or images between its clients?

The JACK Audio Connection Kit (http://jackaudio.org/) is a really useful tool for working with audio on linux systems. It allows for both audio and MIDI data to be communicated between its clients, ...
1
vote
2answers
405 views

How to write to SD card with dd command?

Having some trouble with writing to my SD card, burning NOOBS (New Out Of Box Software) software to my SD card for Raspberry Pi. Attempted to use the following command as root: # dd bs=1M ...
1
vote
3answers
687 views

How to force lp from CUPS to print in grayscale?

I want to print an image from a command line: lp -o scaling=//100// image.jpg How can I force it to be printed in grayscale?
4
votes
2answers
460 views

Capturing Screenshot of terminal application via shell script?

Problem Run iftop for 5 seconds, capture the screenshot and save it to a file. iftop is a beautiful program for visualizing network traffic, but it doesn't have a batch mode where I can run it for ...