Questions tagged [matlab-cvst]

In Matlab, the Computer Vision System Toolbox provides algorithms and tools for the design and simulation of computer vision and video processing systems. The algorithms include 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.

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How to sync audio and video signals in MATLAB?

I have a video clip that has a frame rate of 25 fps (MJPEG compression) and an audio clip with a sample rate of 48kHz. Both of them play for the same duration - 27 seconds. Is there any standard way ...
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43 views

How to specify 2-D coordinates of an object in matlab?

This is the scenario: I marked two axes (figure below) on a board and a camera(global vision system) sees the board. I want to make the vision system to recognize $X$ and $Y$ axes and specify ...
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1answer
786 views

Real Time Depth Estimation in MATLAB

I want to estimate depth from live video stream with two calibrated webcams in MATLAB but has no results. I have Webcam Support Package and Image Acquisition Toolbox but I don't know how to use live ...
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1answer
299 views

Alternative for pcshow() function in matlab [closed]

I'm using Matlab R2015a and I want estimate depth but an error occurs and I wonder that it doesn't know pcshow() function. Why it doesn't work and is there another alternative for that?
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2answers
532 views

Depth estimation from live video stream in matlab

I want to estimate depth from live video stream with two calibrated webcams in matlab but has no results. In this post depth is estimated with two recorded video files. how can I estimate depth in ...
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1answer
2k views

Rotated object detection by Viola jones Algorithm

In my project I need to detect rotated and non-rotated faces in real time. I read original articles and try to use common implementation in matlab and openCV. And as I understood Haar features are not ...
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2answers
5k views

Using SURF algorithm to match objects on MATLAB

I am trying to find the difference between two images, using Matlab. The classic built in function that Matlab provides for this is because the two images don't have the same dimensions (The objects ...
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2answers
239 views

How can I classifying this License Plate images? Matlab , LPR ,

I want to perform automatic character recognition on licence plates. One of my preprocessing step is binarization. However I have four different class of images and I have to use a different automatic ...
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1answer
557 views

KLT tracker implementation

I'm working on a object tracker based on KLT algorithm using matlab. Can anybody guide me how I can find the features and calculate the distance in the sequence of the frames? Thanks.
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2answers
883 views

Compare feature vectors of an image in MATLAB

I am working on OCR. I have extracted features of 26 alphabets, and I want to compare them with an experimental character feature. I have tried using Euclidean distance and correlation functions, but ...
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2answers
4k views

Vehicle detection in matlab [closed]

I am new to matlab and computer vision. I used the code given in the link to detect cars. But the problem is the shadow is also being detected and tracked. Can anyone tell me how to modify the code so ...
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2answers
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How to detect letters in an image?

I have a project that requires detecting and processing letters in a given input image. I am also new to subject of image processing. There are lots of subsubjects in image processing. I believe I don'...
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3answers
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Training own classifiers using trainCascadeObjectDetector for face detection

I want to train a cascade classifier to face detect. I read this page. But I wont use trainingImageLabeler app, because I already have face and nonface database sized 24x24. How I use ...
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0answers
961 views

extracting audio and video from video file

I tried the following code in MATLAB R2013b ...
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1answer
1k views

Object Detection Algorithms

I'm a complete beginner to object recognition. I need to identify and count how many of a certain type of Lego, in a picture full of different pieces of Lego, using MATLAB. The pieces of Lego I need ...
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2answers
728 views

How to calibrate three orthogonal cameras?

I am trying to find out intrinsic parameters(focal length ,principle point,and lens distortion coefficients)as well as the extrinsic parameters(rotation and translation of each camera relative to the ...
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2answers
976 views

how to detect corner in a digital image using MATLAB? [closed]

I am designing an algorithm for image processing. I am using MATLAB for the processing of the images(video). How I can detect the position of the corners in the image?
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0answers
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Train a Cascade Object Detector in MATLAB

I am trying to train a cascade object detector in MATLAB using the built in functionality from the Computer Vision Toolbox. I’ve taken 500 photo’s of the sole of my shoe. Every photo is taken from ...
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3answers
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Is it possible to convert from 2D to 3D form?

I have captured car positions at different frames from the video. Suppose car's(e.g.left side car which is coming towards us in the images) centroid at video frame1 is P(x1,y1) and Q(x2,y2) at video ...
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1answer
898 views

Background subtraction for object tracking

i am working on object tracking. i want to use background subtraction. i have tried to find out papers on background subtraction but i am really confused to use which one. I have already done tracking ...
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1answer
4k views

Train Cascade Object Detector example in MATLAB

I am trying to use the example from here to detect a stop sign. But when I change the image to search for stop signs in there are a huge number of false positives. Am I doing something wrong?
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2answers
813 views

Techniques to reduce delay in detecting face from video using vision.CascadeObjectDetector in matlab

I wrote matlab code for face detection.In my code it is detecting face for first 100 frames and it crop faces from each frame and saves it in database folder.Problems iam facing 1.Detecting face ...
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2answers
2k views

Is there any good book regarding 3D reconstruction from 2D images? I prefer to work in MATLAB

I am working on a project regarding 3D reconstruction of 2D images. I have understanding of finding and Mathcing the keypoints and its algorithms; but i am not able to replicate the theory in MATLAB ...
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2answers
2k views

Kalman filtering in image processing, resources?

I'm looking for a good resource (book, tutorial, lesson etc.) that explains the usage of Kalman filtering in image processing applications. I'm aware of the fact that Kalman filtering is an optimal ...
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3answers
786 views

Detect keypoints in images without corners

I am trying to achieve a pattern matching between an image and a scene in which the image is. I am having problems with some images that does not contain corners, since SURF is not able to find ...
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1answer
315 views

create a Calibration Board [closed]

How could I know the best size of the board for my camera? My camera is Canon D-100 It's 18 megapix I have created a board consist of 14*10 squares the length of each square is 7*7cm I need to know ...
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1answer
5k views

Hand detection in matlab

I am beginner and I want a help to know how to detect hand in Matlab. First, I need code which detects skin and then draw a rectangle around a region so it show to me face and hand. When I try to ...
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1answer
174 views

trainCascadeObjectDetector seems to be missing from MATLAB R2012b

I wish to use trainCascadeObjectDetector to train on new objects (other than faces); I have the Computer Vision Toolkit installed; but this function trainCascadeObjectDetector seems to be missing from ...
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2answers
2k views

Training custom classifiers using trainCascadeObjectDetector

Is there any good documentation about training your own classifiers(with examples included) different from this one provided by MathWorks. Thanks in Advance
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2answers
4k views

Object Recognition using bag of features using matlab [closed]

I want to write a MATLAB program for simple object recognition using bag of features. In short, I want to first extract the features from an image, create a visual library using those features, then ...