Something related to visual data files

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1answer
4k 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.
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2answers
2k 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 ...
9
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1answer
10k 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 ...
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1answer
1k 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 ...
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0answers
61 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 ...
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2answers
3k 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, ...
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3answers
1k 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 ...
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2answers
62 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 ...
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1answer
265 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 ...
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0answers
104 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
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1answer
981 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 ...
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5answers
2k 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
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1answer
771 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 ...
7
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1answer
3k 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 ...
4
votes
1answer
1k 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 ...
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6answers
3k 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?
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3answers
737 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?
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votes
1answer
3k 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?
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2answers
2k 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 ...
2
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1answer
1k 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 ...
8
votes
3answers
5k 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
4k 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 ...
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2answers
5k 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 ...
0
votes
1answer
121 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
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4answers
1k 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 ...
9
votes
1answer
3k 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
156 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, ...
2
votes
3answers
5k 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
2k 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
85 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 ...
2
votes
1answer
7k 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
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0answers
42 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, ...
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2answers
1k 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 ...
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3answers
3k 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?
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2answers
2k 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 ...
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2answers
666 views

Change Linux boot logo

I want to change the penguin logo that appears on boot. I looked into it and found this command: pngtopnm nelogo.png | ppmquant -fs223| pnmtoplainpnm > logo_linux_clut224.ppm But when I tried it ...
0
votes
1answer
288 views

Looking for simple photo organizing software for Linux

I am looking for a simple Linux software to organize photos. What exactly I want to do with this application is the following: I want to view all images in a given folder and just tag/star/mark some ...
1
vote
1answer
85 views

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 ...
4
votes
2answers
638 views

Program for taking snap-shots of movie?

Are there any programs that would let me specify parts of a video-file (avi, mpeg, mp4, ...) and take "snap-shots" every so-and-so second/minute, and store it as a series of image-files (eg. jpeg)? ...
3
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1answer
1k views

Viewing large image on Linux

I need to view a large (50000x40000 px) png image on Linux. Unfortunately most tools (eog, convert etc.) either crashes or fail with note about too little memory. Is there a way to view this image (I ...
0
votes
1answer
4k 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 ...
1
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1answer
65 views

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 ...
3
votes
2answers
197 views

Search by file dimension [duplicate]

I have many photos. How to search files by its dimensions? For example, i want to search images with exact dimensions 500 x 500 pixels. Is there any utility for this task?
6
votes
2answers
172 views

Sync Palm Centro pictures on Linux

I have a Palm Centro, and I'd like to copy the pictures to my computer. However, I'm using Ubuntu, and I don't want to switch to Windows or use Palm's horrible sync application (through Wine.) Is ...
3
votes
2answers
202 views

Delete duplicate images. Need Software for computing average color of an image

I want to delete duplicates in a massive bunch of images. Well as I have dups of the same picture in a different resolution I will make the deletion myself. BUT I want to do this in linear time. So I ...
4
votes
4answers
3k views

How to visualize directory tree structures?

I know I can use tree to show the nested content of a directory. Alas, its output is hardly beautiful as I want to include it in a documentation. So eye-candy is a requirement. So I was wondering if ...
5
votes
1answer
564 views

Console ScreenSaver without X11

I'm trying to setup a very slimmed down console only Debian system to act as a simple slideshow photo display. I know that it is possible to show graphics (I guess using the framebuffer) in the ...
3
votes
1answer
318 views

Icon themes, when is svg format helpful?

I found that arch provides both oxygen-icons and oxygen-icons-svg, what's the necessity of svg format? Is there something that a PNG image "can't do", maybe performance issue? Not sure about it.
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1answer
1k 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 ...
2
votes
1answer
55 views

Printing maps/cartoons/text saved as a picture/etc

What is the best way to print maps/cartoons/text saved as a picture/etc., so pictures that are not photos? The standard routines seem to blur and soften the printed picture, which is probably ...