Answered
Matlab2014b installation on Win7 freezes at 43%
Hi Yi, Here's an <http://www.mathworks.com/matlabcentral/answers/158603-why-does-the-matlab-installer-hang-or-freeze-during-t...

11 years ago | 0

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I need a matlab code for segmentation of text lines in a scanned document image using projection profile?
You can try the |ocr| function in the Computer Vision System Toolbox.

11 years ago | 0

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Depth map merging or Point Cloud Merging
Hi Alvaro, The Computer Vision System Toolbox now (as of R2015a) includes functionality for <http://www.mathworks.com/help/vi...

11 years ago | 0

Answered
Object segmentation: defining the object of interest
Hi Mona, You can use |vision.PeopleDetector| from the Computer Vision System Toolbox to give you the rough region of interest...

11 years ago | 0

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Answered
How to detect glasses on the face ?
Hi Varun, I would try using |vision.CascadeObjectDetector| to detect the face first. Then, I would try to detect the eyes ins...

11 years ago | 0

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Answered
How to implement OCR WITH KNN
If you are doing this as an exercise, then there is a function called <http://www.mathworks.com/help/bioinfo/ref/knnclassify.htm...

11 years ago | 0

Answered
Stereo Calibration and Image Rectification
Hi John, You should check a couple of things. First, it looks like your checkerboard is a very short distance away from the c...

11 years ago | 0

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Answered
Crop video using ForegroundDetector?
You can do that using the foreground mask: frameWithNoBackground = frame .* fgMask;

11 years ago | 0

Answered
Extracting Text From Video Using MATLAB
The following <http://www.mathworks.com/help/vision/examples/automatically-detect-and-recognize-text-in-natural-images.html exam...

11 years ago | 0

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please inform me how to extract features from ICDAR13 handwritten digits dataset to classify digits of groups 0-9 using SVM in matlab?
Check out <http://www.mathworks.com/help/vision/examples/digit-classification-using-hog-features.html this example> from the Com...

11 years ago | 0

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I am trying to track face in a video using KLT in Matlab R2014b but I don't know how to remove this error "Expected ROI to be an array with number of elements equal to 4". Can any one help?
Hi Adil, It looks like the face detector did not detect anything. You have to check whether |bbox| is empty.

11 years ago | 0

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Answered
How to create a depth map of a given image?
You can do this using the Computer Vision System Toolbox. If your cameras are not calibrated, then you can do <http://www.mat...

11 years ago | 1

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How to convert optical flow velocity to meters per second?
Hi Erik, You should multiply by fps, instead of dividing. The time between two frames in seconds is 1/fps. Also, are you ...

11 years ago | 1

Answered
how to place a filled shape on a bbox to maks the moving object like placing rectangle using insertObjectAnnotation?
What kind of shape? |insertShape| will let you draw rectangles, circles, and polygons.

11 years ago | 0

Answered
Hi I am trying to execute HOG features from an image..
There is a built-in function for extracting hog features in the Computer Vision System Toolbox called |extractHOGFeatures|.

11 years ago | 0

Answered
This MATLAB code for try catch not works properly.
Hi Nimisha, |boxPairs| can never be equal to 0. |boxPairs| is an M-by-2 matrix containing the indices of matched features. Ho...

11 years ago | 0

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Answered
How to learn MATLAB toolboxes?
<http://www.mathworks.com/help/index.html MATLAB documentation> is a good place to start. More specifically, try looking at the ...

11 years ago | 0

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Which unit of measurement are the cameraParameters?
Hi Joep, The correct answer is that the distortion coefficients are dimensionless, and they do not depend on the checkerboard...

11 years ago | 2

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Answered
Change Read Only Properties to writable?
Hi Joep, You can create another |cameraParameters| object using the <http://www.mathworks.com/help/vision/ref/cameraparameter...

11 years ago | 2

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Answered
How to train SVM having more than two groups?
You can use the <http://www.mathworks.com/help/stats/fitcecoc.html fitcecoc> function in the Statistics Toolbox.

11 years ago | 1

Answered
I need a code for classifiction of wbc using svm.The code involes 3 steps namely image segmentation,feature extraction and classification using SVM
Hi Arjun, What's wbc? For SVM you can use the <http://www.mathworks.com/help/stats/fitcecoc.html fitcecoc> function in the S...

11 years ago | 0

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svm classification in MATLAB
Hi Celine, To train an SVM, you can use the <http://www.mathworks.com/help/stats/fitcecoc.html fitcecoc> function in the Stat...

11 years ago | 0

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Answered
How to use SVM in matlab for character recognition?
Hi Prashanth, If your goal is to recognize printed text you can use the |ocr| function in the Computer Vision System Toolbox....

11 years ago | 0

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Camera measurements after calibration
Hi Erik, If you need to measure planar objects with a single camera, then you need to know the camera extrinsics, which are t...

11 years ago | 0

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Answered
vectorizing 150 images, reshaping them and concatenating in computer vision
You can read an image using the |imread| function. You can convert an image into a 1D array using the : operator. % Pre-a...

11 years ago | 0

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How to draw centroid that include the value inside bounding box?
Hi Mohamad, |vision.CascadeObjectDetector| gives you bounding boxes of the form [x, y, width, height]. You can compute the ce...

11 years ago | 0

Answered
Kalman filter and bounding box tracking
The easiest way to use the Kalman filter is to track the centroid of the eye. If |bbox| is your bounding box, then you can compu...

11 years ago | 0

Answered
Very slow execution on Matlab code in linux
Hi Dimitris, Based on what you are saying I would guess that the bottleneck may be in reading the video. Matlab uses the code...

11 years ago | 0

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Answered
How can I write the results of my 'Video OCR' script to an excel document in the following format?
You can write your output into a .csv (comma-separated values) file using the |csvwrite| function. Excell can read a .csv file, ...

11 years ago | 0

Answered
Can anyone help me to code for facial emotion recognition?
For starters, you can use the |vision.CascadeObjectDetector| object in the Computer Vision System Toolbox to detect faces, eyes,...

11 years ago | 0

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