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0
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0answers
11 views

How do I ignore unnoticeable changes in png images that git thinks have changed? [on hold]

We have an automated process that generates screenshots of our application into a git repository. These screenshots are then manually inspected for changes from their previous version using an image ...
0
votes
1answer
35 views

Downloading images via wget

When downloading an image with wget using wget link I get the following errors: HTTP request sent, awaiting response... 302 Moved Temporarily Location: [following] --2015-05-24 14:47:46-- ...
0
votes
0answers
14 views

Substracting colors and extracting transparency values

Lets say a picture was made to semi-transparent and added on a flat background color. The original picture, background color and result(mixture) is known. But, that added transparency(alpha value) is ...
4
votes
3answers
429 views

Does the JPEG file format support RGB data?

I am doing some programming that involves encoding image data using WIC. I used RGB data but WIC always treats it as BGR. I have a related question on Stack Overflow dealing with the programming ...
1
vote
0answers
20 views

How does one recover a large image, given several crops of it with sufficient overlap? [closed]

Suppose you have several small images, all cropped from a single large image. Each small image is some subrectangle of the large image. The small images have sufficient overlap with each other. ...
0
votes
0answers
32 views

How to display a fragment of an image file using Scalpel

I am working on a demonstration using Scalpel and its abilities to carve out image files. I took a small thumb drive and filled it with many small sized files until it was full. I then went and ...
0
votes
2answers
36 views

Image sequence handling in ffmpeg

I need to convert an image folder with unnumbered names, like: 11.49.18.204.jpg 11.49.28.205.jpg 11.49.38.220.jpg 11.49.48.220.jpg 11.49.58.235.jpg 11.50.08.250.jpg FFMPEG only accepts numbered ...
0
votes
1answer
32 views

What do I look at when I view a JPG image in a text editor? [duplicate]

I am not knowledgeable of Image file formats or even compression. I opened up a JPG image file in a text editor and I saw gibberish. Not zero and one gibberish. Or even numbers from 0 to 256 ...
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0answers
34 views

How to add a jpg as a layer in a psd file via script

I have a folder of paired jpg and psd files, like the following: AAA.jpg AAA.psd BBB.jpg BBB.psd CCC.jpg CCC.psd I'm trying to figure out how to merge the jpgs into the psds in an automated way. By ...
1
vote
2answers
74 views

Deduplicate images synced across devices in various resolutions

I currently have a couple of scripts and Android apps that together do the following for a set of member devices (smartphones, PCs, digital cameras): all pictures taken by all member devices are ...
0
votes
1answer
38 views

Why this scanned book image has no background?

If you save this image on your desktop, you see it's background color as your desktop color. If you open it with Adobe Photoshop, its background id checkered which means it has no background. It's ...
1
vote
1answer
66 views

video size reduction by grayscaling it

When we convert a video into grayscale, all of its 3 colors (RGB) in a pixel are assigned the same number (instead of 3 different numbers). So theoretically we must have reduction in size almost by ...
0
votes
1answer
247 views

reducing the size of PDF file of scanned images

I downloaded this PDF file from a website which is 350 KB in size with 20 pages. All pages are scanned images. I extracted the images using Adobe Acrobat Pro which are 1.32 MB in size collectively ...
4
votes
0answers
46 views

Heterogeneous (cpu+gpu) System Architecture using C++ [closed]

I want to develop an image processing system on a computer that has both multi-core CPU and GPU (I don't have such a computer yet, so this is part of the question too - what cpu and gpu models are ...
1
vote
1answer
212 views

How to interpret image hex dump?

I'm curious about how the PC actually sees files, and after I did an assignment about files and used hex dump to check if it was writing correctly, I wanted to try it with other file types (actually ...
0
votes
2answers
21 views

What is the codec that increases resolution of image upon adding further data?

On some websites I've seen images that 1st appear bit blurred and then they gradually get better in steps. What is the image codec? Is it PNG? In "The Social Network" The movie title is displayed in ...
0
votes
1answer
31 views

How can I make images converted by NConvert smaller?

I am using nconvert to convert screenshots generated by "The Elder Scrolls Online", which are in BMP, to PNG. 1 BMP has around 7 MB, the resulting PNG has about 3MB. This is still very big to upload ...
0
votes
1answer
788 views

Document scanning: How to speed up the software part of the scanning process? [closed]

I am looking for a solution to speed up my document scanning process, especially for those documents that are not suitable for a typical document scanner with an automatic document feeder (ADF). For ...
2
votes
2answers
2k views

How to convert an image from perspective projection to orthographic projection?

Sometimes you want to make a 2D image on the computer from a real life 2D image, but for whatever reason you can't get a straight, front-on view of the image. Say it's a billboard and you can only ...
2
votes
1answer
153 views

How to draw pixel-perfect geometric shapes and patterns?

When designing user interfaces, games and other visual applications, very often you have to have an image with a well defined geometric pattern. Some examples: A placeholder image of given size with ...
1
vote
1answer
296 views

Converting JPG to BMP, then back to JPG without loss

Someone has converted a number of JPG's to BMP's, and then to PNG, under the assumption that it will "increase quality". Of course, it doesn't, as once you've introduced lossy compression you can ...
2
votes
1answer
101 views

How to generate images with fixed file size?

I want to generate images with fixed file size (not image size). I've tried some of the solutions here Batch "resize" JPEG images to a fixed file size, but files generated are fixed in size ...
-4
votes
0answers
52 views

Resizing image for facebook [closed]

Yesterday I took a night shot of Hooghly Bridge with D5100, and it was cool :) I resized down the image to 2048*1356 px using Photoshop CS5 [default settings] and uploaded the image to Facebook. ...
0
votes
0answers
316 views

How to stitch planar images? [duplicate]

Suppose I have perfect planar fragments of a big image. How to stitch them automatically? Software should detect edge features but should not expect camera calibration.
2
votes
2answers
3k views

Getting the predominant colour in an image?

Is it possible to get the predominant colour in an image from the command line? Ideally I'd like it back as hex or RGB. I thought it might be possible to do this with imagemagick's identify command, ...
0
votes
0answers
200 views

Has anyone successfully installed cygwin/xview/wfdb/ecgpuwave recently? Does it work?

I am having a problem with cygwin/xview/wfdb/wave/ecgpuwave. Having installed CYGWIN successfully, I installed XVIEW followed by WFDB according to procedure specified at: ...
0
votes
2answers
1k views

Convert gif to svg using inkscape

Is there any way to convert a gif file to svg using command line inkscape? I would like to convert the gif to a "real" svg but bot just embed the gif into the svg. Or any other command line tool to do ...
0
votes
1answer
1k views

PDF to PNG with ImageMagick/GhostScript: Colorspace=sRGB breaks script

In order to convert a PDF with 100 pages to single PNG files, I've been using the following command: C:\Program files\ImageMagick\convert -density 150 -alpha Opaque file.pdf file.png But that ...
1
vote
1answer
5k views

Windows: Batch processing images with GIMP and saving them to new files

On my windows machine, I want to use GIMP to modify all PNG files (filename.png) in the current directory and to save the output file to the sub-directory out/filename.png. The processing that is ...
0
votes
2answers
45 views

Is there an ISO standard for cameras recording date taken? [closed]

My application has a set of images on which computation is conducted. But the issue is that most of the cameras that take the images do not provide seconds in the "Date Taken" field of the image ...
1
vote
4answers
1k views

Software that can identify and remove foreground objects from image [closed]

I am interested in removing extraneous objects from an image. More specifically the situation is that there is a series of images of a particular background. In each image there are objects in the ...
18
votes
4answers
21k views

I want to change DPI with Imagemagick without changing the actual byte-size of the image data

I feel so horribly sorry that I have to ask this question here, but after hours of researching how to do an actually very simple task I'm still failing... In Gimp there is a very simple way to do ...
1
vote
1answer
2k views

Batch processing with ImageAlpha

I am trying to figure out how to do batch processing with ImageAlpha. I really like this program, but I cannot figure out how to batch process. Just to be clear, I am trying to convert several images ...
1
vote
2answers
238 views

How can I batch-process (crop) these images?

I would like to know how to (as fast as possible) mass edit (means everything at once - around 100 images): What I want to do is remove both (upper and downer one) big black lines as well as remove ...
2
votes
0answers
550 views

Gifsicle: How to set it to not overwrite the original GIF file if the resulting modified GIF file is larger than the original?

About Gifsicle: Gifsicle is a command-line tool for creating, editing, and getting information about GIF images and animations. One of its features is (from its website): Optimize your ...
1
vote
1answer
242 views

Is there a simple image tool on mac to read alpha value of a pixel?

I am looking for a simple tool that will let me read the RGB and alpha (A) values of a pixel in an image. Something like DigitalColor meter but that returns alpha values. I know this is possible in ...
0
votes
2answers
1k views

How do I make floor plans from photographs?

I'm looking for software or an online service that can take multiple photos of the inside of a house and create a 2D or 3D floor plan. Such software has been under development by the computer vision ...
0
votes
1answer
626 views

Why does gm always export all layers of the input image?

Given the following command line: '/usr/bin/gm' convert 'directory/filename.psd[0]' filename.jpg I will always receive all layers from the .psd as output: $ ls something* something.jpg.0 ...
5
votes
1answer
902 views

Is there any software to analyze and detect 'fake' hi-res images (TIFF when really JPEG, deliberately upscaled images)?

In my line of work I often work with images for print marketing from multiple sources and occasionally when I have asked for hi-res images (instead of initially the low-res ones that they start by ...
3
votes
4answers
1k views

Detecting blank image files

I am using scanimage with a document scanner (Canon DR-2510C) that supports duplex scanning. Unfortunately, its SANE driver does not support blank page detection, so that with mixed pages ...
1
vote
1answer
445 views

Best practice for editing multiple images in the same way

I have a project that I'm working on that requires me to edit 8 similar images in the exact same way. In other words, I need some way that whatever I change on the first image, I need to be able to ...
0
votes
1answer
45 views

A tool (library, source-code, algo) to select area in an image based on perceived focus plane

Say we have an image in which a human eye can distinctly see several "planes" of focus - a blurry background ("telelens"), the sharp(er) subject (a human, or an object), and again a blurry foreground ...
70
votes
1answer
48k views

Combine multiple images using ImageMagick

I would like to combine multiple images into one image using ImageMagick. To explain a little better, I want the result to look similar to this: That is, I have a number of screenshots, and I want ...
1
vote
2answers
75 views

How do I combine several images into a single one?

Is there a program that let's me choose separate image files and output it as one whole image with the images lined up horizontally as a transparent gif?
1
vote
1answer
585 views

How to join multiple images into one preview

I have hundreds of vector clip art sets (EPS and AI) with JPEG previews for each vector image and I need to create nice preview image for each set (preview image must contain all jpeg previews of one ...
91
votes
12answers
60k views

How to get information about an image (picture) from the Linux command-line?

Am working on a web-app, and currently am migrating some stuff from an old app, but I hate that I have to open an image editor to get some info about images I am migrating. Things like image ...
3
votes
2answers
2k views

How to uniformly change color of an image?

I have an image that is kind of reddish/orange: Is there a tool (e.g. Photoshop, Paint.NET, etc...) that let's me pick a different color set (say green) and that would color the image accordingly. ...
0
votes
4answers
32k views

How can I combine multiple GIFs into one GIF file?

How can I combine multiple GIFs into one GIF file? I just want to display the images side by side.
42
votes
16answers
82k views

How can I combine 30,000 images into a timelapse movie?

I have taken 30,000 still images that I want to combine into a timelapse movie. I have tried QuickTime Pro, TimeLapse 3, and Windows Movie Maker, but with such a huge amount of images, each of the ...
2
votes
1answer
263 views

Software to aid using camera as a scanner

I want to digitize some index cards with my camera. I'm looking for a program that would automatically fix geometry on the shots (as you would expect the cards come tilted on the picture). I have an ...