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by Vian Esterhuizen

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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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2answers
101 views

How is data in a camera's colorspace transformed into XYZ or a standard RGB space?

I have a canon 600d that says it uses sRGB. How is this even possible without having the same spectral sensitivity spectrum as a standard observer? It is possible to define the matching functions of ...
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1answer
105 views

can you remove a hair on the image sensor in light room?

i took a series of pictures yesterday and discovered that shooting around f/13, f/16, there is what appears to be a hair located on the image sensor and is visible in the pictures where the lens is ...
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4answers
936 views

A beginner with post processing wanting to learn [duplicate]

Possible Duplicate: Any good tutorials for learning how to post-process images? Though I have been trying hands on photography for quite a while now, I want to learn post processing of ...
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1answer
132 views

What's the best way to remove discolouration of scanned photographs?

I'm got a batch of printed photos which I am scanning to store a digital copy of and possibly enlarge them for printing. I've scanned them at the maximum quality (600DPI) and saved it with the least ...
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3answers
338 views

Would you use an online RAW image processing application? [closed]

I'm just curious, if there was a web-site/web-portal related to RAW image processing what features you would prefer to use on it: RAW image processing (from different Cameras) Implementing different ...
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2answers
83 views

How can I batch process HDR images in Lightroom?

I have taken a series of 8 images for a 360 panoramic shot using bracketed exposure of 3. This produces 24 total images, which I would like to process in lightroom using HDR merge. Currently, I am ...
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1answer
269 views

What is the best way to resize a high-DPI image for use on the web and in mobile apps? [duplicate]

I've been given an image (I'm guessing straight from a camera) and it's currently at at 240 pixels per inch. It's been a while since I did much Photoshop; I have three questions for two requirements: ...
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1answer
102 views

Access “Pre-Bayer” RAW image to analyse channel values [closed]

First of all i 'm working with a Fuji Finepix HS50 EXR I'm doing an internship and my job is to collect photosite raw data to analyse phosphorescent paint comportment. To do so I need to access the ...
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1answer
43 views

Retina Display-Can anyone suggest how to literally make an image “retina display”? [closed]

Can anyone suggest how to literally make an image "retina display"? I think it doesn't depends on the camera. Does their is any software for it? I want another suggestion. Can anyone suggest a ...
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1answer
48 views

Programming curves tool how to work with RGB (combined) channel

I'm working on a Curves tool and i need to adjust all three channels at once using one curve. (RGB Curve) Internally, the class i created for the counting gets a set of control points the curve ...
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1answer
79 views

Image bending? Light bending? [closed]

Anyone know how to project an image onto a curved wall but still make the image appear as though its on a flat surface?
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1answer
78 views

Slicing articles from a photo or pdf newspaper page [closed]

I have a pdf file which is a pdf format of a newspaper page that has many articles(image + text), same as the articles we find in the newspaper that newspaper vendor drops at our place everyday. I ...
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2answers
279 views

What factors, asides from temperature, affect dark current?

What is an effective means of determining the average dark current/noise of a camera image sensor? My understanding is that this is type of noise is temperature dependent, what other factors may ...
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2answers
448 views

Image overlay and processing [closed]

If I overlay an image( lets say A) with another image(B) using 50% transparency. is it possible to recover A without knowing what B is? Dose overlaying make it hard to extract the original content? ...
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1answer
501 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 ...
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1answer
76 views

What causes chroma noise in an image sensor

I'm trying to understand what is causing chroma noise in an image sensor, specifically why it is so visible when the ISO is set to a very high value (which for CMOS I guess means that there is an ...
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0answers
34 views

An online service to create “photo stacks”? [duplicate]

I'm really not sure what the following is called (this isn't my image): The image was from here (not really relevant though). I want to create something like it, though. Is there a website for me to ...
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0answers
66 views

In intuitive explanation what is zig zag scanning?

In intuitive explanation what is zig zag scanning and what is the purpose for using it in image processing ?
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0answers
109 views

What is the difference between edge detection, Sobel detection, and Canny detection?

What is the difference between edge detection, Sobel detection, and Canny detection
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0answers
145 views

How can I automatically square-crop an image?

I have a large number of photos that I need cropped into squares, the thing is I want to crop them "intelligently" so I don't end up cropping through someone's face if tha isn't necessary. Are ...
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1answer
296 views

How can I differentiate an Original and Photoshop Image [duplicate]

May be this is a wrong place to question this. But, please allow me to ask at least. We have some photography event in our office. So, we have mentioned the rule of date capture (like photo must be ...
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3answers
90 views

How to erase ALL metadata associated with an image? [duplicate]

I'm looking for a way to get rid of ALL metadata associated with an image. What should I do?
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0answers
27 views

Erase background from an image [duplicate]

I 'm interested about erasing backgroung from an image. Taking into account that I 'm an amateur, which is the best way doing this? I hade already tried with backgroung eraser tool ...
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1answer
90 views

What is the color structure histogram and how does it work?

What is the color structure histogram and how does it work
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1answer
2k views

How to calculate object's height in pixels from an image? [duplicate]

Possible Duplicate: Calculate object size when I have physical pixel size I am working on the following formula to calculate distance of object from camera: distance to object (mm) = ...
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2answers
167 views

What workflow will speed up sorting photos stored on a NAS in OS X finder before import into Lightroom?

I have a DSLR camera; D7100 to be exact. I originally purchased it, because I was fed up with all the point and shoot cameras out there and wanted control over my photos. At this point, I'm wanting ...