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Image processing is the computational transformation of an image signal. It's about the technical side of batch transformations, conversions, and enhancements, as distinct from post-processing (adjusting an image to achieve a desired look, probably using image processing).

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6
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4answers
4k views

Should I save an image as png, jpeg or bmp?

If I edit an image file using some application like Gimp, Photoshop or MSPaint, while saving I will be asked to select the required file-format. There are different formats available, the common ones ...
3
votes
5answers
9k views

How to get creamy skin tone in Lightroom

I googled some tutorials on "creamy lightroom", but most of what I found ended up turning my photos' skin tones too orange, too "vintage". I tried desaturating Orange to counter this, but the ...
5
votes
3answers
2k views

How can I adjust the colour temperature of an image programmatically?

I'm wondering how to convert programmatically (i.e. with a programming language rather than an editor) from one colour temperature to another? If, for example, I make the assumption (and it's a big ...
0
votes
1answer
503 views

How is colour balancing performed in post processing of raw images

I had asked a question previously here which though not duplicate but is related to this. Asking this one as I feel it is different. My question is basically related to colour balancing/colour ...
5
votes
1answer
544 views

How can I improve the results of my proprietary RAW processing pipeline?

I am doing some experiment with Raw image processing using two post processing tools: Adobe PhotoShop (PS) CS5 Proprietary Image processing pipeline code. Data Capture: I captured some raw ...
19
votes
5answers
10k views

How can I tell exactly what changed between two images?

For example, for a recent conversation about JPEG compression I wanted to compare pixel for pixel what changed between two JPEGs (one with compression level 100, and one with compression level 95). ...
4
votes
3answers
4k views

How can I resize Raw images and store them back in the original format?

I have some raw images captured using Canon,Nikon,Minolta cameras.(*.CR2, *.NEF, *.MRW) I want to change resize them and store them back as the original format. I checked in two tools, Canon ...
1
vote
2answers
621 views

Raw Captured Image processing

I intend to take raw images using a Canon which gives *.CRW and DNG format raw images. I have below question regarding processing of those raw capture 1] What all tools(I am ready to ...
13
votes
3answers
724 views

How would I go about using my SLR to measure the 'greenness' of a photo?

Background My digital pictures can be read into a computer program like Matlab or R as a m x n x 3 matrix where m x n is the number of pixels observed by each of the three (red, green, and blue) ...
4
votes
4answers
793 views

Query about gamma correction?

I have a bespoke Image Capture & processing flow, wherein I do the following operations:- Capture Raw data-->De-Bayer(Get RGB)-->Color Balance-->RGB-to-YCbCr-->Image sharpening-->Denoise ...
3
votes
2answers
616 views

Which colour space should I apply Image sharpening filter?

I am trying to apply a Image sharpening 2D filter kernel(Laplacian) on a Image in my proprietary Image/Video processing pipeline(From Camera raw to final JPEG/MPEG). I plan to perform 2D convolution ...
9
votes
3answers
2k views

What is a quick way to restore old black and white and sepia photographs?

I have a bunch of old black and white and sepia photographs from my grandparents' album that I scanned and would like to restore. The photographs are generally in good condition. there are some ...
5
votes
3answers
7k views

What software tool can I use to convert a photo to line drawing?

What's the best way to do this, using free software? I want to convert photos to line-drawings, maybe cartoons ...
15
votes
3answers
4k views

Can software auto-detect image focus?

I was wondering if there was any photo management software out there that could auto detect and "rate" images on how in focus they are. This comes up for me quite commonly when i am looking through a ...
2
votes
1answer
772 views

How exactly do RGB curves work and interact w/each other in Photoshop?

So I understand how a single curve works: If you create a curve such that R100 (in) becomes R50 (out), every pixel that has an R value of R100 becomes R50. Similar deal with the RGB curve: if you ...
18
votes
7answers
3k views

Other than the iMac, what's a brilliant display for my images?

When I started researching gear to start my photography passion I fell in love with the large iMac display. The large bright screen at the best buy was showing a sideshow if images that looked better ...
7
votes
2answers
1k views

Where can I develop 110 film?

Where can I develop 110 film from my Pentax 110 SLR?
7
votes
3answers
1k views

Process stereoscopic image to convert from 3D to 2D

I am wondering if it is possible to take a stereoscopic image and sum them in such a way that makes it a monoscopic image, with the resulting viewpoint in the center of where the two viewpoints ...
6
votes
3answers
299 views

How much does in-camera image processing affect noise on Canon DSLRs?

I've found out that some of photos take with my 5D MkII have more shadow noise than I like. I know there are some obvious settings that affect this, such as ISO a noise reduction settings. But there ...
15
votes
10answers
35k views

Cheap/free tool to view/convert Canon CR2 RAW format photo files on Windows?

Recently, my family had some professional photos taken while vacationing at a resort. The photos were given to us on CD in both .CR2 and .jpg formats. While we can view the JPEG-format versions of ...
6
votes
2answers
226 views

Red Haze across right and top of photo

I take a photo with the cap on, set to shutter priority mode and set to 30s. After photo is taken and the NR job runs, I end up with a black picture and a red line/haze down the right side of the ...
7
votes
2answers
4k views

What workflow should I use for processing RAW photos in Lightroom?

I started shooting in RAW, and I use Adobe Lightroom. What workflow would you recommend to use for the processing? I will really appreciate a detailed description of the steps (or a link to one). ...
26
votes
4answers
852 views

What are Color Profiles and where would I find information on using them properly?

I see the term "Color Profile" a lot and I have this vague idea that it helps you adjust color values based on the unique differences of both cameras, displays and printers from some ideal device. ...
11
votes
6answers
2k views

Is post processing always necessary for best results?

While using my old Point and Shoot camera I used to think about post-processing photos in Photoshop like something unnatural, fake, and deceptive. But after buying DSLR I have not only to think about ...
13
votes
12answers
1k views

What noise removal tools work best, and why?

Can anyone recommend some good noise removal tools, free and commercial? Should support RAW and JPEG. Are certain tools better than others in particular situations? Do some integrate better with other ...
57
votes
14answers
41k views

What tools are available for RAW image processing in Linux?

I have been taking photographs with RAW format. What tools are available for working with RAW under Linux?
15
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5answers
6k views

Nikon RAW image processing in non-Nikon software

I love Adobe Lightroom, the workflow, the interface, the whole package. However, as a Nikon owner never did I manage to get the colors to look as good as after processing with Capture NX. No doubt ...