A form of signal processing where the input is an image. Usually treating the digital image as a two-dimensional signal (or multidimensional). This processing may include image restoration and enhancement (in particular, pattern recognition and projection).
Questions tagged [image-processing]
600 questions
35
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3 answers
What is the most accurate way of determining an object's color?
I have written a computer program that can detect coins in a static image (.jpeg, .png, etc.) using some standard techniques for computer vision (Gaussian Blur, thresholding, Hough-Transform etc.). Using the ratios of the coins picked up from a…
MoonKnight
- 717
3
votes
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modelling an image matrix with correlated pixel values
Trying to improve a certain algorithm for manipulating certain micrograph images, I would like to experiment with "random" synthetic images as input to the algorithm. The pixel entries would be non-negative integers in [0,255]. I would like to…
David Epstein
- 1,147
2
votes
2 answers
Skewness and Kurtosis in an Image
I am working with textures in an image. I have implemented algorithms to calculate the skewness and kurtosis in an image histogram. Great, delighted with that. I am using RGB as my color model. I know the equations and I understand what they and the…
user1167596
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vote
1 answer
Questions on bag of features methods
I've been studying the bag of features (BoF) methods. I understand the basics and how it's done but I think I still am not good at the details. So here's my understanding of such methods:
Suppose you have a data base of images and you need to…
Gigili
- 845
1
vote
0 answers
how Neural Network works on image recognition
Possible Duplicate:
How does neural network recognise images?
I am trying to learn how Neural Network works on image recognition. I have seen some examples and become even more confused. In the example of letter recognition of a 20X20 image, the…
user1731927
- 359
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vote
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How can I quantify the symmetry / asymmetry of this kind of data?
Let's say I have 30 of those pictures
https://i.stack.imgur.com/jzxkv.jpg
I have the numbers (amounts of dots on both sides, e.g. 17 and 19) at hand, alternatively I could also do something with the distances "red dots <-> black straight line".
I…
1
vote
1 answer
Breaking black and white captcha
I am looking for a way to break this kind of captcha:
I know that there are always 4 digits, in black and white. The image basically consists of an easily recognizable 4-digit code, mixed with a mask whose form is arbitrary.
I am pretty confident…
Arnaud
- 113
0
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0 answers
Heat kernel and laplacian
Is there any relation between heat kernel and Laplacian? I know what each of them is but I am not sure about the relation between them.
Gigili
- 845
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Does normalizing image data cause the model to ignore colors?
After deducting by the images mean and standard deviation, most of the differences between wildly different pixel values of images should be very small. I understand this is to prevent certain image colours (e.g. background colours that are very…
infomin101
- 1,733