All Questions
Tagged with computer-vision algorithms
23
questions
0
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0
answers
14
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How are values assigned to pixels in hyperspectral imaging for airborne cases?
From what I know, hyperspectral images can have up to hundreds of bands. During acquisition, each pixel seems to store only one value. Later, algorithms are used to calculate the missing values across ...
- 1
0
votes
2
answers
48
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How to determine stripe width of a barcode
A barcode consists of alternating back and white stripes. Thin stripes are one "unit" wide. We'll assume fat stripes are 2 "units" wide. But how big is a "unit"?
I can't ...
- 11
1
vote
1
answer
418
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Problem with "Topological Structural Analysis of Digitized Binary Images by Border Following" by Suzuki Abe
I have a Problem with the Paper "Topological Structural Analysis of Digitized Binary Images by Border Following" by Suzuki and Abe.
In the Chapter "Appendix I: The Formal Description of ...
- 11
0
votes
1
answer
531
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Finding rectangle corners by using point cloud
I have a rectangle in the 3D scene, which I know its width and height. It is placed in the 3D scene like the image below. I can manually select all points on the rectangle by mouse click.
Given the ...
- 103
7
votes
2
answers
746
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Convex Optimization in Signal and Image Processing
In signal processing, convex optimization plays a useful role in problems such as sparse signal recovery and filter design. What other places does convex optimization appear?
For example, in ...
- 148
1
vote
1
answer
625
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I have some questions about background subtraction with Gaussian Mixture Model (GMM)
I'm learning about Gaussian Mixture Model (GMM) for background subtraction.. And have some questions about it..
In Chris Stauffer paper "Adaptive background mixture models for real-time tracking" ...
- 35
0
votes
1
answer
816
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Is my algorithm about blob tracking for vehicle following correct?
I'm doing vehicles tracking project. The video is a one-way, no vehicles occlusion.
After doing background subtraction, erosion and dilation, I get bounding box objects for each frame, and I can find $...
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0
votes
1
answer
3k
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AGAST vs FAST evaluation
In ~2006 the FAST corner detector was introduced. One of it characteristics is that you have to train a decision tree from some test image in order to learn the types of corners present and relevant ...
- 268
1
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1
answer
412
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Computer Vision/Image Processing Riddles [closed]
I know this topic is not clearly relevant to the forum, but I think it's fun and interesting.
I'm looking for computer vision riddles - fun and interesting questions that have a clear and precise ...
- 141
3
votes
1
answer
2k
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Barcode localization in difficult environments
I'm creating a program for localizing types of barcodes.
(I know plenty exist, that's not the question :) )
I'm focusing for the time being on 1D barcodes.
The difficulty I have is that the barcodes ...
- 67
1
vote
1
answer
334
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Image processing research areas using GPU [closed]
I'm an undergraduate student and I am currently trying to find suitable topic for my bachelor thesis. The broader topic I've selected is "Image processing on GPU", so basically I'll be developing ...
- 111
0
votes
1
answer
1k
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HOG descriptor algorithm
I would like to implement a HOG descriptor in C++.
I found an implementation of this code in Open Pattern Recognition Project - Histograms of Oriented Gradients (HOG) Feature Extraction.
An extract of ...
- 101
2
votes
0
answers
117
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Phong Reflection Model Parameters
Question: Can anyone refer me the Phong reflection model parameters for a face image taken for web-cam?
Details:
I am doing 3D reconstruction of 2D images using 3D Morphable Model as in this paper ...
- 365
12
votes
4
answers
344
views
Any references for the trade-off between software and mechanics/optics in industrial machine vision systems?
I explain my question with a simplified example.
I can design an industrial vision system for the automatic inspection of an item with these main requirements:
the image of a good piece must be a ...
1
vote
0
answers
44
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Looking for algorithm to extract line network from binary images [duplicate]
Possible Duplicate:
Looking for algorithm to extract line network from binary images within LabView
I would like to create a LabView VI that receives an input image and the RGB-color codes of the ...
- 123
2
votes
1
answer
641
views
Safe Point Thinning Algorithm - How to?
I am relatively new to image processing and am working on a project that requires the thinning of binary images. In the literature, I've seen references to the Safe Point Thinning Algorithm(SPTA) ...
- 121
4
votes
2
answers
989
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Qualitative Evaluation of Interest-Point-Detectors and Descriptors in Computer Vision
I'm writing on a qualitative evaluation study of interest-point-detectors and descriptors. I've read all Mikolajczyk papers as well as most of the surves from Datta et al. etc. Now I'm implementing an ...
- 231
4
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2
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164
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Struggling to find a good definiton for Gabor-Descriptor
I am attempting to implement the Gabor Descriptor based on the following paper Image Copy Detection Using a Robust Gabor Texture Descriptor. It is the best paper that I have found on the subject. It ...
- 275
1
vote
1
answer
1k
views
is it possible to matching b / w images without feature extraction steps? if possible which algorithm may be more suitable?
these are example of my image
i have a 245 images similar to it ,i obtained these b/w images after preprocessing stage , i want to use them for recognition persons(not verification) in matlab. can i ...
- 171
15
votes
1
answer
6k
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Binary robust independent elementary features ("BRIEF") understanding
How are the descriptors in the BRIEF algorithm matched to each other?
How is the template image found in the another image? How do we compare the descriptors?
I have read that article but didn't ...
- 461
-1
votes
1
answer
480
views
Which are the steps to extract contours/shapes from depth videos?
I am trying to create a histogram of the depth videos (converted to grayscale first) in order to apply a threshold to keep only highest values, and then do some dilation in order to extract contours. ...
- 11
17
votes
3
answers
7k
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Contours matching - finding contours displacement
I found contours on two images with same object and I want to find displacement and rotation of this object. I've tried with rotated bounding boxes of this contours and then its angles and center ...
- 317
7
votes
1
answer
1k
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Skel to infinity morphological operations on 3D volume
I have a 3D volume image that consists of 2D tomographic images. In MatLab, for 2D images, we can use bwmorph and call for 'skel' operation to infinity to get a pixel thick overall outline of the ...
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