12 questions linked to/from How to find circular objects in an image?
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### How to find a stop sign in a picture. Is ComponentMeasurements feasible? [duplicate]

To be simple, to find the stop signs is to find the red octagons in the pictures. There may be several stop signs in one pictures and how to find all of them?
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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 ...
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### How can I detect an ellipse in a photo?

I tried to detect the rim of the following cup as an ellipse. I've tried the solutions given in How to find circular objects in an image? to detect the ellipse, but the detection result was not quite ...
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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 ...
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### detecting the radius of an incomplete circle

I need your help to detect the radius of the blue circle in images like this: . Reading these questions: 1, 2, 3, I figured that this code taken from @halirutan answer to question n°3 could help: <...
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### Counts and Sizes of Highly Overlapped/Contacted Particles from Microscopic Image

Dear all below is an image from microscope that I have a hard time doing image processing to get the particle counts and the corresponding sizes (the large one is around 1 micron). The way I did was ...
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### Identify circles in Image and make list of all diameters

I have this SEM image: I would like to make a list of all diameters of each circle. Can I somehow let Mathematic identify the circles (approx.) and extract the diameters ?
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### How to perform noisy circle detection

I want to detect circles that are embedded in noise. For this I created a few circles with some defined signal-to-noise ratio: ...
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### Analysis of many similar x-ray Images

From a 3d x-ray scan, I have many similar slices to analyze. Is there a way to determine the position of the three rectangles and the inner circle?
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### Determine circle sizes in picture

I need to determine the size of the 16 circles. Therefore I tried to binarize the picture to get the 16 circles, but i failed. I used a combination of Binarize, EdgeDetect and FillingTransform. But ...