3
votes
Accepted
If each pixel contains the channels for the 3 primary colours, why can a 1-bit picture only be presented in white and black?
Please read the Wikipedia article 8-bit color.
8-bit color graphics are a method of storing image information in a computer's memory or in an image file, so that each pixel is represented by one 8-...
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A pretrained model for mathematical equations characters detection
Detexify is a service that recognizes LaTeX symbols from handwritten figures. Their training dataset is freely available on Github.
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What is the time complexity of determining maximal overlaps between bitmap images?
For a pair of matrices $A, B$, $B$ maximally overlaps $A$ at a position if and only if certain two rectangular sub-matrices of $A$ and $B$ match.
It is not clear how to use the two-dimensional suffix ...
- 2,205
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vote
Accepted
Good Practice : Which VAE latent variable to use in dimensionality reduction
The simplest is to use $\mu$ as the output. You could also use $z$ as the output, but that will make your dimension reduction randomized, which in some settings might be undesirable (and others might ...
D.W.♦
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Which algorithm is most suitable for comparing two images to find differences?
On top of other suggestions, feature registration may be appropriate if the images are difficult to register. Detect features using an algorithm like SIFT, and then use RANSAC to find correspondences ...
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2D fourier transform
It has same meaning as the 1d Fourier transform: the magnitude and phase of waves that, when superimposed, reconstruct your original signal. In one dimension,
the signal is (usually) a function of ...
- 163
1
vote
Accepted
How can you apply dynamic connectivity problem to digital photos?
The problem manifests when maintaining connectivity data either in edges or objects within the image. For machine vision you might want to increase the reliability of an edge detection algorithm by ...
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vote
Accepted
Greyscale image to binary image conversion using operations on pixel
You are looking for a thresholding algorithm. There is no correct or incorrect algorithm. Some methods tend to work better than others on specific types of images; which method is best may depend on ...
D.W.♦
- 156k
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Transformation Function: Gonzalez and Woods
Those ${\sum}\text{-signs}$ specify sigma notation. They're basically like for loops where you keep summing up the value specified in the body.
The equation,
$$
T ...
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