Questions related to image representation, segmentation, visual object categorization and image processing algorithms in general.
Questions tagged [computer-vision]
478 questions
3
votes
1 answer
Why does a rotation transformation have 3 degrees of freedom?
I'm learning about computer vision and came across this point that my instructor made in the material regarding image transformations.
He claimed that rotation has 3 degrees of freedom, but I'm having trouble wrapping my head around how that is. As…
Sean
- 3,887
2
votes
1 answer
Why do we use Hough instead of RANSAC in SIFT?
In his SIFT paper, why did Lowe choose to use a Hough transform rather than
RANSAC to recognize clusters of 3 consistent features? (Note that RANSAC is more efficient in comparison with Hough)
Link to the paper:…
M.Hossein Rahimi
- 195
1
vote
0 answers
Image segmentation service
hope you are well.
Does any one knows any service where I can send an image an return its segmentations areas, like using Meta's SAM (https://segment-anything.com/ )?
If not, does any one knows a guide on how to deploy a model like it using Azure…
Mario Arango
- 11
1
vote
1 answer
Which algorithm or tool to use for object detection and extraction?
I will collect a dataset consisting of blackberries with and without defects. For this purpose, before I venture into this business I want to make sure that I can detect and extract blackberries from an image.
So I have this image
With the otsu…
Girigio
- 63
1
vote
1 answer
In what form is optical flow used an input to a neural network?
I have extracted the optical flow of images. Should I pass the x,y optical flow or should I pass the RGB visualization as the input. What is the difference between the two?
1
vote
1 answer
Calculating joint distribution of two i.i.d geometric random variables, and proving their independence
In this question, we will further investigate the geometric distribution. Let X, Y be i.i.d. geometric random variables with parameter p. Let U = min{X,Y} and V = max{X,Y} − min{X,Y}. Compute the joint distribution of (U,V) and prove that U and V…
user169009
1
vote
0 answers
What's the relationship between the sift features and the minutiae features?
As we know, in the field of fingerprint or palmprint recognition, both the sift features and the minutiae features can be used to construct the descriptor. However, what's the relationship between them?
Michael Ray
- 11
- 2
0
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Instance Segmentation: Categorisation of architectures (one-stage / proposal based / etc.)
I am currently working on the topic of instance segmentation. So far I have found three possibilities for categorising the architectures:
one-stage / two-stage architectures
proposal based / proposal free architectures
detection followed by…
0
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1 answer
How should I stack up optical flow along axes to pass it to a neural network
I have extracted the optical flow along x and y axes. I want to pass them into a ConvNet. The thing I cannot understand is whether these should be two different input channels or should I combine them in some way, like stacking them, adding them or…