Manipulating and processing static images, techniques and software for such task should use this tag.

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0
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1answer
36 views

Why are the images produced by pdfimages different when using the -all flag?

It's my understanding that pdfimages -all extracts images from PDFs in their native formats. Therefore, I expected that the JPG (lossy) images extracted from that command would have the same pixel ...
2
votes
0answers
32 views

Why are image files from pdfimages bigger than the PDFs they came from?

On Ubuntu 16.04, pdfimages -all produces image files whose sum of storage use is greater than the PDF files from which they came. Is there any explanation for this? How can I extract image files ...
0
votes
0answers
25 views

run processing linux standalone in ubunto

I am using Simpleopenni V.1.96 library in Processing 2.2.1. I wrote a sketch utilizing Simpleopenni library in processing. Although this sketch is running perfectly and the exported files are ...
0
votes
1answer
3k views

Building Caffe: Failed to see hdf5.h

Hello Caffe is a library for deeplearning. When trying to build that library under Ubuntu 15.04, the compilation fails with the message: :~/App/caffe$ make all PROTOC src/caffe/proto/caffe.proto CXX ...
0
votes
1answer
33 views

Default way to Convert .mp4 file to .gif in Ubuntu 16.04?

I would like to do this by default tools and scripting. The logic is just to take pictures from the video and store them in the .gif format. You should not need external tool do it. What is the ...
1
vote
1answer
36 views

Auto Photo Crop

I want to crop photo black background with command line This command didn't help: convert input.png -trim output.png My image
0
votes
0answers
10 views

Why g3data of apt-get is not working in 16.04?

I do g3data image.png I put data points on the graph. The button Export point data remains all the time inactive. Screenshot Why g3data is not working in Ubuntu 16.04?
0
votes
0answers
9 views

How to extract text from an image

I am doing project on extraction of video into text and image into text. I have got code for video to text extraction. But not able to get code for image extraction, i am using netbeans software for ...
51
votes
9answers
23k views

Tool to add shapes, annotations and text using templates to images

Often I need to annotate (draw some arrows, lines, basic shapes like squares, ellipses etc and enter some text) on top of pictures (JPG, PNG images) and screenshots (again png images). I would also ...
2
votes
3answers
348 views

Any feature in ubuntu by which we can lossless compress images in bulk

I am looking for a way in which I can do a lossless compression of all images in a directory in a batch process. I don't want images to loose quality. I am running this website Winni.in, for this if ...
3
votes
1answer
34 views

Recommendations for a simple screenshot annotation tool?

I am looking for a simple screenshot annotation tool with the following features: Crop Resize Blur Draw shapes and lines Add text
15
votes
2answers
15k views

Resize images to specific height value in ImageMagick?

I've looked around for this, and can't find an easily implemented solution. Currently I'm working on an application that deals with panoramas. As they come out of the batch stitch process, the ...
2
votes
1answer
61 views

How to batch rename JPEG files to image date, adding a count that resets for each day?

I'm using pyrenamer with my photo collection and it works great except for one issue. I want it to rename photos by their date taken metadata, with a three-digit number at the end. Each folder in my ...
0
votes
1answer
31 views

Program with particular MS Paint feature?

I have been looking for an image editing program with a extremely convenient feature from Microsoft Paint. MS Paint allows you to hold the right mouse button while erasing over a region to erase ONLY ...
0
votes
1answer
2k views

How can I install a package from Octave Forge?

How can I install a package from Octave Forge? I am using imresize function and I get this error warning: the 'imresize' function belongs to the image package from Octave Forge which seems to not ...
0
votes
0answers
57 views

convert multiple jpg images to png changing to transparent background

I need to iterate over a folder with lot of logo images (in JPG) and convert them to PNG and change the white backgroun to a transparent one. Is there a linux command to convert jpg to png and ...
19
votes
2answers
11k views

How can I turn photos of paper documents into a scanned document?

My scanner has broken! I do have a good camera though so I've taken a few photos of the documents I want to scan... However they look like photos of paper, not scanned documents: Images aren't flat ...
3
votes
3answers
145 views

How do I capture a screenshot of a window, and all the windows on top of it?

I'm using screenshots as regression tests for GUI software. Before deploying each new version, a series of automatic tasks is run against the old and the new version, screenshots are generated after ...
93
votes
7answers
109k views

Simple image editor?

I want something similar to "preview" in macs. For example: I want an image editor that ONLY does simple adjustments like increase/decrease contrast, saturation, exposure, color tinting.... rotate, ...
1
vote
1answer
42 views

Resizing pictures

Currently running Ubuntu 15.04. I am trying to resize a set of photos which original size of each is 3906*2602. Whether I try with darktable or mogrify specifying 1920*1080 I end up with 1621*1080. ...
55
votes
6answers
45k views

How can I scale all images in a folder to the same width?

I want to scale all images in a given folder to the same width (but different appropriately scaled heights). How can I do this using a GUI-based or command-line tool? For bonus points, is it ...
9
votes
2answers
224 views

ImageMagick convert and low RAM

Please consider the following command for the imagemagick package: sudo convert -resize 460x200 /path/to/test1.jpg /path/to/test2.jpg Now test1.jpg is a fairly large image (12.5MB), but not unheard ...
4
votes
3answers
1k views

Convert emf to PNG image using command line

Is there any command line tool available to convert emf to png images? I tried the convert utility from ImageMagick, but it says decoder for emf not found
0
votes
3answers
496 views

How to convert .jpg or .png image to .raw

Is there any software that converts JPEG or PNG to RAW? I have been looking around and just found a few software that make the inverse anyway.
19
votes
3answers
27k views

How can I split an animated .gif file into its component frames?

How can I easily split an animated .gif file? I want to see each frame. I would really prefer to not to export every frame to a directory. I'd like to view them individually in one application if ...
1
vote
1answer
61 views

Scale down image such that it fills a square of 100x100

I want to create thumbnails for all images of a folder. I also want the images to fit in a square of 100x100 pixels. So after scaling the images down, while the smaller side needs to be 100 pixels, ...
-1
votes
1answer
38 views

Is there any “Background Removal” Program in Ubuntu besides GIMP?

I need to remove background from images locally. I use photoshop in windows and GIMP in Linux but GIMP is too much for me for simple background removal purpose. Is there any easier alternatives for ...
98
votes
14answers
128k views

How to easily resize images?

I would like to know how to re-size images in Ubuntu. What is the easiest tool to do so?
5
votes
3answers
9k views

How can I remove the gray-scale page background of a PDF document scan while preserving the text? (Binarization)

My PDF contains 600 pages with images of text. It has 2 layers. Layer 1: Background colour image Layer 2: Text image I would like to remove all background image layers in the total PDF file as ...
0
votes
2answers
131 views

how to convert .svg image to .png? [duplicate]

I would like to change the color of some SVG pictures and then save them as PNG images. I have installed GIMP. I am running Ubuntu 14.04. How can I do that?
0
votes
0answers
28 views

Bruteforce download and convert images

So, I'm basically trying to bruteforce download from a server that doesn't seem to support directory listing or FTP. I know the image files are all png and have numeric filenames ranging from 0-500. ...
20
votes
1answer
22k views

How to crop borders/white spaces from image?

I have a lot of images which have white borders around them. I would like to crop those borders all at once, preferably from command line. I believe that it can be done with ImageMagick, but I ...
2
votes
2answers
632 views

can't install cpan module GD

Since I failed to install Image::Magick on my non-GUI Ubuntu server Ubuntu 14.04.2 LTS (read about it here), I tried to install another image-manupulation tool that can be used from a perl-script: GD. ...
0
votes
2answers
59 views

Does digiKam supports RAW files of Canon G16?

When I open an RAW file of my Canon G16 camera (.cr2 suffix) with digiKam 3.5.0, the colors are wrong and there are black margins. What settings must be done in digiKam to process the file or does ...
6
votes
2answers
4k views

What software can display raw bitmaps on Linux?

I have a raw file but I don't know the pixel format or the width of the image. I need a tool that can quickly display the data and allow me to try different formats easily. An example of such a tool ...
2
votes
1answer
16 views

Convert image color channels?

So, I have an image and I want to be able to set the Red and Blue values so they're equal to the value of the Green in the image. This is because the image is entirely Green and I want it to appear ...
3
votes
1answer
54 views

Gimp color tools don't work

When I try to run color modification tools like right-click -> Colors -> Colorize (or any of the color tools, Brightness / Contrast, Hue / Saturation, etc), nothing happens: When I click Colorize ...
0
votes
1answer
780 views

How to create JPG file in RawTherapee without changing original RAW

With RawTherapee 4.2, I want to edit the image and export it as jpg file, but without touching the original RAW file. Is it possible? At the moment I copy the RAW, edit it and put it to the queue to ...
2
votes
2answers
203 views

Convert folder with tiff to jpg by using mozjpg

I hear that mozjpeg is a nice jpeg compressor from Mozilla. How can I convert my folder with *.tiff to jpg from terminal using mozjpeg?
2
votes
1answer
43 views

How can I get ImageJ to open all files in the same session?

When I open more than one image from Nautilus in ImageJ they all open in a new session. If I already have one session running and open a new file in Nautilus ImageJ also creates a new session. How can ...
-1
votes
1answer
158 views

Is there a linux command to bulk optimize several image files in just one step?

I have a bunch of images in a folder: images/image1.jpg images/image2.jpg ... These images are not optimized for the web. Just wondering if is there a linux command to bulk optimize those images ...
28
votes
7answers
117k views

How do I install python imaging library (PIL)?

How do I install the python imaging library (PIL) on Ubuntu? I tried doing sudo apt-get install python-imaging but now when i run python selftest.py (a script I got from somewhere on the ...
9
votes
1answer
1k views

How to convert a PNG strip to a GIF?

So, I made this animation in a program, however, it doesn't seem to support exporting as a PNG sequence so I could convert it to a GIF. The animation is over 100 frames so saving each image one-by-one ...
17
votes
3answers
849 views

How can I take a screenshot from a window, with customizable margins

I need a tool that will do the following: selecting a window, will make a screenshot of that window with a x padding, like in the following image: So, in most of the cases x will be equal with y, ...
2
votes
2answers
2k views

Merging multiple images into one document and add any caption/label to them

I have multiple jpg and png images. I would like to combine them within one document (ODT/PDF/RTF). It can be easily done by means of following command: convert *.png allTogether.pdf However, there ...
7
votes
3answers
9k views

How to convert CR2 to JPG or PNG?

I need to convert a lot of CR2 photos to either JPG or PNG, no editing. How to do this?
17
votes
3answers
2k views

Stitch scanned images using CLI

I have scanned a newspaper article which was larger than the scanner glass. Each page was scanned twice: the top and the bottom parts, where the middle part appeared in both images. Is there a way to ...
2
votes
0answers
123 views

Image manager (picasa like)

I'm trying to find an image viewer/manager which should have two main features: Its fast in displaying/load images. gpicview is fair good at this task but doesn't have the second point... I need a ...
0
votes
1answer
463 views

Faststone Image Resizer equivalent for Ubuntu

I am moving over to Ubuntu from windows (gradually) and have used Faststone Image Resizer for windows for a while and found it very good, Is there an equivalent piece of software for Ubuntu that ...
0
votes
1answer
341 views

Auto rotate scanned text

How to automatically rotate a scanned image? Even if you insert the paper into the scanned carefully. About one degree rotation is left. Is here no way to automatically rotate the scanned image? I ...