Mathematica Stack Exchange
Mathematica Stack Exchange

Questions tagged [image-processing]

Questions on the image processing capabilities implemented in Mathematica.

Computational techniques for the manipulation of digitized raster images with Mathematica. This involves structural, morphological, geometric and color manipulations, feature detection, handling alpha channel, sharpening, blurring and many other filters.

Questions dealing with the color conversion of images might want to use the tag . Questions about importing and exporting images should use tags and , respectively.

Useful links:

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Help find a bright object on Mars!

In today's news, scientists found a bright object on one of Curiosity's photos (it's near the bottom of the picture below). It's a bit tricky to find - I actually spent quite some time staring at the picture before I saw it. The question, then, is…
Victor K.
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QR Code in shopping cart handle

This week, the market people from my work wanted to put QR codes in shopping cart handles, but when they tested it, the QR code did not work. I noted that the cylindrical curvature (even small) distorted the image, and the cell phone can't read it.…
Murta
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Image processing: Floor plan - detecting rooms' borders (area) and room names' texts

Here is a simple building floor plan. I would like to derive the rooms as (rectangular) components and the names of the rooms. This is very common representation of building floor plans. The problem So far I could clean up the floor plan. However,…
s.s.o
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Torn edge paper effect for images

In my answers to Plotting Error Bars on a Log Scale I used a so called "torn edge" effect from on one of the images. @SjoerdC.deVries commented: "BTW I liked the ripped-out look of your InputForm picture; Mathematica? It's ideal for pictures that…
Vitaliy Kaurov
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Detecting grid lines in a raster image

Motivation: Last October 7 there was a presidential election in Venezuela. Although the opposition saw an unprecedented increase in its votes, the government votes increased even more resulting in the current president being re-elected. The votes…
Gustavo Delfino
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Finding areas of beings in microscopic image

I've got lots of images of diatoms. I need to get a list of their equivalent radii. It's not crucial to get them all, as long as those missed don't mess with the radius distribution (as would happen if it always missed the biggest ones or the…
Rojo
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How to find circular objects in an image?

How could I use morphological processing to find circular objects in an image? More specifically, I need to detect road signs. I need to get the "80 speed limit" sign from this image:
Anton Medvedev
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Remove image background of headshot in Mathematica?

For example, using ExampleData[{"TestImage", "Girl2"}]: what's a general way to make the background transparent? I've tried various combinations of EdgeDetect and Threshold and ImageAdd but can't figure it out. Thank you.
Philip Maymin
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FindFaces: how to improve the results of the face recognition feature

In Mathematica 9, the FindFaces command offers an easy way to detect faces. In some experiments, I've been getting reasonable results, but I'd like to know if there are ways to improve the success rate. As with the online help example, I thought the…
cormullion
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Find radii of concentric circles in image

I have an image of concentric circles, I would like to find the radii of the circles (only the innermost few are important). I've had a go using what I could find in previous posts, but am a bit confused about which method I should be using - if I…
Jeff
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Cleaning mildew from old documents using Mathematica (Image processing)

While visiting family over the holiday period, I managed to have some good mother-daughter bonding over how far back I’ve managed to trace the family tree (Mom is in her 80s and doesn’t do computers). I’ve been using the usual databases like…
Verbeia
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How to merge several partially overlapping screenshots into one image?

I have two screenshots: For a long screenshot picture I usually use PhotoShop to combine both images: How do I use Mathematica to make an automated program to do this? Is there a smarter method?The ImageCorrespondingPoints should be helpful,but…
yode
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Counting radial ridges on an image

After happily using the v9 image assistant to crop elliptically an image, and then the drawing tools to put a white disk in the middle, I turned this image: into the following one: that can be imported with…
Rojo
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Estimate the "Blurry" distribution of an image

I'm trying to analyze an image obtained by scanning electron microscope(SEM) where different parts of the same image has has different blurring radius. My goal is to determine how blurry different part of this image is. Clearly, the central part of…
Wjx
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How to stitch two images together

I have talk about how to catenate two images whose have same part totally in my this post. But in this case two images have similar information, not totally same. img1 = Import @ "https://i.stack.imgur.com/oc1L8.jpg" img2 = Import @…
yode
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