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I am new to camera calibration. I want to know that,how to do camera calibration by using white square paper instead of cheakerboard?
The Camera Calibrator App can only work with a checkerboard pattern. However, you can calibrate on the command line using the |...

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Specifications of checkerboard for stereo reconstruction with maximum accuracy?
Hi Sanya, 1. The number of squares is not terribly important. You want your checkerboard to be large enough to take up a sign...

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How can I make a rough 3D model from different 2D images of different views of a foot
You do the reconstruction using a calibrated stereo pair of cameras. Take a look at this <http://www.mathworks.com/help/vision/...

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Performing Multiple camera Calibration
You may have an older version of MATLAB. The Stereo Camera Calibrator app, which does exactly what you need, was added in R2014b...

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how can i use matlab for scene recognition with bag of words
There is now support for image classification using the bag of words model in the Computer Vision System Toolbox. See this <htt...

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k-means algorithm for construct vocabulary for bag of words
There is now support for image classification using the bag of words model in the Computer Vision System Toolbox. See this <htt...

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imageSet function not working
You may have an older version of MATLAB. |imageSet| was added in R2014b release.

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Large error in sparse 3D point cloud
Hi Luca, Thanks for your kind words. You are correct about the negative values. If camera 1 is on the right, then that is...

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Reason for Checkerboard Corner Detection to Fail
Hi Sanya, I have noticed something strange about your images. There are white gaps between the corners of black squares that ...

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Create Level 2 S-Function Block from .M Filfe
Hi James, If you have the Image Acquisition Toolbox, then you can use the <http://www.mathworks.com/help/imaq/fromvideodevice...

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How to detect text region from a document image?
Try using the |ocr| function in the Computer Vision System Toolbox.

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how do i add or draw the rectangles around movable object in real time video.enclosure:code
You can use the |insertShape| function to draw a rectangle into the image.

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Overlay tracing with marker in MATLAB
Hi Clan, Your code takes too long and uses up a lot of memory, because you are overlaying the frames on top of one another in...

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features of a binary image, ocr
There is a built-in |ocr| function in the Computer Vision System Toolbox.

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Face recognition and image normalization
If (x1,y1) is the center of the first eye, and (x2, y2) is the center of the second eye, then (y2 - y1) / (x2 - x1) is the tange...

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Problem with image rectification and stereo disparity.
The biggest problem here is that [0 0 0;0 0 0;0 0 0], which you are passing into the constructor of |stereoParameters|, is not a...

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How to run the Stereo camera calibrator with a fixed intrinsic parameters?
Hi Jason, Unfortunately the Camera Calibrator app does not currently have this capability. You can try working around this li...

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How can i detect car using tail light color and shape of the car?
Out of curiosity, is there any reason your supervisor does not let you use SVM? You can try using the |trainCascadeObjectDete...

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after haar wavelet how i can detect left extreme and right extreme pixel locations of eyes , mouth,nose.
If you have the Computer Vision System Toolbox, you can use |vision.CascadeObjectDetector| to detect faces, eyes, nose, and mout...

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Moving Object Detection in Matlab
If you have the Computer Vision System Toolbox, try using |vision.ForegroundDetector|.

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Distance from camera using sparse 3D reconstruction
Hi Luca, I would highly recommend you try the Stereo Camera Calibrator app in the Computer Vision System Toolbox. After you ...

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How to create images database in matlab to store 5 images.
The <http://www.mathworks.com/help/vision/ref/imageset-class.html imageSet> class in the Computer Vision System Toolbox gives yo...

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How do I obtain camera Extrinsic parameters (matrices R and t) without using a checkerboard?
To compute the extrinsics, you need to somehow define a world coordinate system, because the R and t must be relative to somethi...

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How can i reconstruct 3D cloud from two images?
Hi Srinivasan, Can you please tell me which function throws the out of memory error? Is it |rectifyStereoImages|? |reconstru...

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how to use tesseract in matlab for OCR?
There is now |ocr| function in the Computer Vision System Toolbox.

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Code is getting struck
I would recommend using the Stereo Camera Calibrator app and the |triangulate| function in the Computer Vision System Tooblox. ...

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embed mplay or vision.videoplayer in GUI
Please see this <http://www.mathworks.com/help/vision/examples/video-display-in-a-custom-user-interface.html example>.

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Finding the Value of disparity?
Typically, the disparity is the distance between the pixel in the left image, and the corresponding pixel in the right image. S...

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Conversion of BRISKPoints and SURFPoints to each other
Please see this <http://stackoverflow.com/questions/25338538/scale-domains-of-surf-and-brisk-points-in-matlab answer>.

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Related to facial Feature point Detection
There are several feature detectors in the Computer Vision System Toolbox. See |detectHarrisFeatures|, |detectMinEigenFeatures|...

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