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Results tagged with image-processing
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user 4539
Questions on the image processing capabilities implemented in Mathematica.
11
votes
Programmatic approach to HDR photography
Exposure fusion is often a powerful alternative to the reconstruction of HDR images if we are only interested in the tone mapped result. HDR reconstructions are often not possible because exposure tim …
- 5,690
7
votes
2
answers
426
views
Efficient Lloyd Sampling of Images
I want to sample a grayscale image so that every voronoi cell contains approximately the same total intensity using lloyd sampling.
My current code is kind of slow and I was hoping for some advice to …
- 5,690
5
votes
Why ColorReplace does not follow the rules specified?
What you want to do can be done way easier:
i = Binarize@Import["https://i.sstatic.net/ZDeYq.jpg"];
Colorize[MorphologicalComponents@i,
ColorRules -> {1 -> Red, 2 -> Blue, 3 -> Green, 4 -> Yellow}] …
- 5,690
7
votes
How to track objects in video
Here is an example how to get the rectangle coordinates
First we extract the rectangles that don't touch the borders with
img = frames[[1]];
rec =
SelectComponents[ColorNegate@img, "AdjacentBorde …
- 5,690
7
votes
Accepted
How to make a cleaner copy out of a blurry text image before OCR?
Level adjustments can be done with Mathematica using the ImageAdjust function.
But I think Binarizeis good enough for the case you presented. The results are pretty close.
img = Import["https://i.ss …
- 5,690
20
votes
1
answer
632
views
Segmentation of sunspots
I recently went for a walk with my camera and snapped a few pictures of the sun. The pictures didn't turn out too well, but this was to be expected without a telescope. I thought it might be a nice ex …
- 5,690
11
votes
How to blend two photos in Mathematica?
ImageAdd does the job. Blend allows you to adjust the blending level.
ImageAdd[tiger, background]
- 5,690
13
votes
1
answer
3k
views
ImageTransformation: polar to cartesian
I am working on something that requires the polar transformation of some images. I implemented this transformation with ImageTransformation:
img = Import["https://i.sstatic.net/9cV4T.jpg"]
{cente …
- 5,690