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Questions tagged [matlab-cvst]

The Computer Vision System Toolbox in Matlab.

In Matlab, the Computer Vision System Toolbox provides algorithms and tools for the design and simulation of computer vision and video processing systems. The system toolbox includes algorithms for feature extraction, motion detection, object detection, object tracking, stereo vision, video processing, and video analysis. Tools include video file I/O, video display, drawing graphics, and compositing. Capabilities are provided as Matlab functions, Matlab System objects, and Simulink blocks. For rapid prototyping and embedded system design, the system toolbox supports fixed-point arithmetic and C code generation.

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Intersection-over-union between two detections

I was reading through the paper : Ferrari et al. in the "Affinity Measures" section. I understood that Ferrari et al. tries to obtain affinity by : Location affinity - using area of intersection-over-union between two detections Appearance affinity…
Sambas23
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Bag of words training and testing opencv, matlab

I'm implementing Bag Of Words in opencv by using SIFT features in order to make a classification for a specific dataset. So far, I have been apple to cluster the descriptors and generate the vocabulary. As I know, I have to train SVM ... but i have…
Mario
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Image recognition of well defined but changing angle image

PROBLEM I have a picture that is taken from a swinging vehicle. For simplicity I have converted it into a black and white image. An example is shown below: The image shows the high intensity returns and has a pattern in it that is found it all of…
Fantastic Mr Fox
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How to do perspective correction in Matlab from known Intrinsic and Extrinsic parameters?

I'm using Matlab for camera calibration using Jean- Yves Bouget's Camera Calibration Toolbox. I have all the camera parameters from the calibration procedure. When I use a new image not in the calibration set, I can get its transformation equation…
GMus
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MATLAB: Drawing a line over a black and white image

What is the best way to draw a line over a black and white (binary) image in MATLAB, provided the start and end coordinates are known? Please note, I am not trying to add an annotation line. I would like the line to become part of the image.
Richard
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3D Correspondences from fundamental matrix

In MATLAB I have calculated the Fundamental matrix (of two images) using the normalized Eight point algorithm. From that I need to triangulate the corresponding image points in 3D space. From what I understand, to do this I would need the rotation…
worbel
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How to obtain Hierarchical component tree of MSER in Matlab?

Maximally Stable Extremal Regions (MSERs) are found from an image in Matlab using detectMSERFeatures. Is there any patch or method to get the hierarchical MSER component tree from Matlab? This tree is anyways being generated when Matlab calculates…
AruniRC
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Does MATLAB use OpenCv CascadeClassifier?

I have a question about CascadeObjectDetector in MATLAB. In source code of CascadeObjectDetector in MATLAB I see: pCascadeClassifier; % OpenCV pCascadeClassifier Then I see: %------------------------------------------------------------------ %…
EgorD
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Automatic Face Detection Using MATLAB

I am trying to implement automatic face detection using MATLAB. I know how to implement it using OpenCV, but i would like to do it in MATLAB. I saw two websites on this: 1) http://www.mathworks.com/matlabcentral/fileexchange/11073. Firstly, this…
lakshmen
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Calibration of images to obtain a top-view for points that lie on a same plane

Calibration: I have calibrated the camera using this vision toolbox in Matlab. I used checkerboard images to do so. After calibration I get the cameraParams which contains: Camera Extrinsics RotationMatrices: [3x3x18 double] TranslationVectors:…
Abhishek Bhatia
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Matching images with different orientations and scales in MATLAB

I have two images that are similar but differ in orientation and size. One example can be seen below: Is there a way to match the two images? I have used Procrustes shape analysis, but are there other ways?
user2307268
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OpenCV 3.0.0 MSER Binary Mask

I am trying to use MSER algorithm in OpenCV 3.0.0 beta to extract text regions from an image. At the end I need a binary mask with the detected MSER regions, but the algorithm only provides contours. I tried to draw these contours but I don't get…
Marco Ancona
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Matlab Cascade train for bees counting

I'm student in agronomy and the subject of my final year study is to assess the number of bees in pictures. I tried some methods (thresolding, template matching with ciratefi algorithm or with imageJ) but none works fine. I'm a beginer with matlab…
Hgwen
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Stereo vision: Depth estimation

I am working on Stereo vision task and I would like to get the distance between stereo vision cameras and the object. I am using Matlab with Computer Vision System Toolbox. I have calibrated cameras with using "Camera Calibration Toolbox for Matlab"…
PrincAm
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Usage of findEssentialMat function in OpenCV 3.0

I'm currently working on a project to recover camera 6-DOF-Pose from two images by using SIFT/SURF. In old version of OpenCV, I use findFundamentalMat to find fundamental matrix, then further getting essential matrix with know camera intrinsic K and…
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