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I used detectharrisfeatures for detecting the facial feature points. But only few images it is working well. For most images it is not showing points correctly. Can anyone suggest best method for Facial Feature Detection in matlab?
It would be helpful if you could post some images with the "incorrect" features. You could try using |vision.CascadeObjectDet...

11 years ago | 0

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Does the Stereo calibration tutorial work for angled cameras?
Have you looked at the plot produced by |showReprojectionErrors|? The mean reprojection error should ideally be less than 0.5 o...

11 years ago | 0

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kalman filter vs correlation filters ?
These are different approaches to tracking. Kalman filter relies on motion, while correlation filters rely on appearance. You ...

11 years ago | 0

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How to track a line using kalman filter object of computer vision toolbox?
Hi Aravind, I think it can be done in principle, but I have never tried it. You would not be able to use the |configureKal...

11 years ago | 0

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background subtraction of images using k-means algorithm
I don't know how to do background subtraction using k-means. However, there is a system object in the Computer Vision System To...

11 years ago | 0

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How does the vision.CascadeObjectDetector detect left and right eyes separately? It is constantly detecting left and right as the same eye.
If both eyes are visible, you would be better off trying to detect the pair of eyes using |'EyePairBig'| and |'EyePairSmall'| mo...

11 years ago | 2

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Error while using foreground detection in matlab with webcam video?
Hi Aravind, This is probably because the |'InitialVariance'| of the foreground detector is not appropriate for the frame data...

11 years ago | 0

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How can i interprete output of opticalflow?
Hi Anu, Getting high flow values at the object's boundary is expected, especially if the object does not have much texture. L...

11 years ago | 1

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How to store the coordinates of a bounding box in a video?
Hi Nikolaos, The problem here is that the second output of |step(hblob, segmentedObjects)| is the centroids, not the bounding...

11 years ago | 0

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how to associating the detections corresponding to the same object over time
Hi Hai, you can put your own background subtraction code into the |detectObjects| replacing the code that computes the mask.

11 years ago | 1

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Answered
Setting up vision.VideoFileWriter in multiObjectTracking.
Hi Daevin, Are you modifying the example script? Are you running the modified script, or are you trying to run |setupSystemO...

11 years ago | 0

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How to get confidence values for detections from vision.CascadeObjectDetector System object?
Hi Matt, Unfortunately |vision.CascadeObjectDetector| does not return a confidence score, and there is no workaround. The rea...

11 years ago | 1

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Answered
how to define 'getsnapshot' for input arguments of type 'vision.VideoFileReader'?
Use this: v = step(vobj) The |vision.VideoFileReader| object does not have a |getsnapshot| method. Instead, you can read...

11 years ago | 0

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Tips and Tricks about 3D Scene Reconstruction
Hi Mahdi, Here are some tips for you: # *Camera Calibration:* Please make sure you have good stereo calibration. Make sur...

11 years ago | 5

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How to increase framerate of display video after hough's transform?
If you know the approximate orientation of the lines in the image, you can try restricting the range of theta using the |'Theta'...

11 years ago | 0

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Why matchfeatures give wrong answer?
Hi Afsaneh, You are getting this result because |matchFeatures| normalizes the feature vectors to have a magnitude of 1. This...

11 years ago | 0

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How to convert 3D point cloud (extracted from sparse 3D reconstruction) from pixels to millmeters?
Hi Kijo, In this example the (X, Y, Z) world coordinates are already in millimeters.

11 years ago | 0

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How to track a face and its features in realtime
This <http://www.mathworks.com/matlabcentral/fileexchange/47105-detect-and-track-multiple-faces example> shows you how to detect...

11 years ago | 0

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what can i do with this error: Error using VideoFileReader/setup
If it works on Windows, but doesn't work on the Mac then it sounds like your Mac doesn't have the right codec installed. Can yo...

11 years ago | 0

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Ground truth a video
Please try the <http://www.mathworks.com/help/vision/ug/label-images-for-classification-model-training.html Training Image Label...

11 years ago | 1

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Is there a good method for painting over an image in a MATLAB GUI without lag?
Do you need to label arbitrarily shaped regions, or would rectangles be sufficient? In the latter case, please try <http://www....

11 years ago | 0

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can Matlab 2014a be installed on a 32 bit linux system?
No, it cannot. MATLAB no longer supports 32-bit Linux. It does work on 32-bit Windows, though.

11 years ago | 1

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Correcting lens distortion during camera calibration
Hi Alex, Yes, the x and y distortion equations are in the normalized image coordinates. That is the origin is at the optical...

11 years ago | 0

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how can I write a parallel code in Matlab?
The reason you are seeing this result is because your loop does not do anything. If you make each iteration of your loop do sub...

11 years ago | 0

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11 years ago | 0

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Can't get video's number of frames before processing?
Thre maybe something wrong with the header of your video file. Can you try |VideoReader| on a different file?

11 years ago | 0

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I want a mtalab code to detect a person from an image, peopleDetector is not working for me.
Can you post a link to this image? Have you tried tweaking the parameters of the people detector? You can try using a differ...

11 years ago | 0

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How do I parse two input arguments for matching dimensions with Matlab Input Parser?
Unfortunately, you cannot do that inside |inputParser|. For each parameter you can only supply a function that validates just th...

11 years ago | 2

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how to do image rectification of stereo images...for 3d reconstruction..?
Take a look at this <http://www.mathworks.com/help/vision/ug/stereo-vision.html example>.

11 years ago | 0

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How to dynamically update a histogram-based tracker?
You would have to call |release()| and then call |initializeObject()|.

11 years ago | 0

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