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Matlab Stereo Camera Calibrator Scene Reconstruction Error
You have two problems here. One is that the lens distortion may simply be too severe. The best thing to try here is to take even...

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Problem with rectify StereoImages
The error you are getting indicates a problem with calibration. |rectifyStereoImages| cannot compute the size of the rectified ...

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Stereo Calibration and Scene Reconstruction
Hi Idan, You should make a large checkerboard and try to take images at various distances. I doubt you can make a checkerboa...

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What image file type does stereo calibration expect?
Stereo Camera Calibrator app takes still images. It will take any image format that |imread| can handle. It is best, however, to...

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How to do Rectification for Stereo Vision?
Please see the <http://www.mathworks.com/help/vision/ref/rectifystereoimages.html rectifyStereoImages> function in the Computer ...

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Stereo matching and disparity map accuracy issue
Hi Victor, When you moved the cameras to the new mount, did the "baseline" (distance between the cameras) change? Did the dis...

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Camera Calibration with dot chart
Currently there is no function in MATLAB analogous to findCirclesGrid() for detecting a pattern of circles. However, if you can...

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camera calibration
Please try the <http://www.mathworks.com/help/vision/ug/stereo-camera-calibrator-app.html Stereo Camera Calibrator app> in the C...

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real time image processing using matlab and stereo camera
Use the |getsnapshot| method of |videoinput| to acquire the frame.

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I have some problem with the insertObjectAnnotation function in Matlab. How do your change the orientation of annotation?
Hi Chen, Unfortunately this is not possible at present. |insertText| and |insertObjectAnnotation| do not let you rotate the t...

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Is there any way to get the pixel to distance ratio from the single camera calibrator app?
Unfortunately, by calibrating the camera you can only calculate the focal length in pixels. If you need the focal length in worl...

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I am getting this error "Undefined function 'assignDetectionsToTracks' for input arguments of type 'double'." . So is the function not there in CV toolbox 5.0? If so what is a similar function available that I can use
assignDetectionsToTracks is available in the Computer Vision System Toolbox, in the R2012b release or later.

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What is the matlab code for the function assignDetectionsToTracks for calculating assignments, unassignedTracks, unassignedDetections from cost?
|assignDetectionsToTracks| is available in the Computer Vision System Toolbox, in the R2012b release or later.

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Determination of stereo camera world coordinates with respect to calibration target
Matt's is almost correct. The extrinsics R and t represent the transformation from the world coordinates into camera's coordinat...

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Operands to the || and && operators must be convertible to logical scalar values
Hi Antariksha, The warning you are getting may indicate a corrupt image file. By the way, when you capture your calibration i...

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Finding area from the bounding box created by vision.blobAnalysis
Hi Akira, Yes, of course. blob = vision.BlobAnalysis('BoundingBoxOutputPort', true,'MinimumBlobAreaSource', 'Property','...

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Detecting and Tracking Moving Objects
Hi Ashmil, There are <http://www.mathworks.com/help/vision/ug/multiple-object-tracking.html many different ways> to detect an...

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size error for my own image in "Automatically Detect and Recognize Text in Natural Images" code
Hi Sara, That is a warning, not an error. |imshow| is issuing this warning whenever it has to re-size the image to fit on the...

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freground detection by GMM in matlab
In general, you can use morphological operations, such as |imopen| to remove noise, and |imclose| to fill in small gaps. In ...

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I am getting the error - Undefined function 'showPointCloud' for input arguments of type 'uint8' . How can this error be removed?
You should be able to use |scatter3| instead of |showPointCloud|.

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How to change properties of pointer tracker without re-initializing tracking?
Hi Hana, The properties of |vision.PointTracker| are non-tunable, which means you cannot change them after you call the |step...

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Problem with rectifying images from a calibrated stereo-pair system
Hi Kevin, I don't think you have a problem here. A disparity of ~80 pixels for an object 120cm away from the cameras is very ...

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Aligning 3D stereo co-ordinate system along local vertical and local horizontal
Hi Meghana, Please keep in mind that in the camera-based coordinates the X-Y plane is the image plane, which is inside the c...

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rectifyStereoImages doesn't work. Why???
Hi Einav, Can you please post your images and the stereo parameters? Off hand, I would say you could use more calibration im...

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How to get the camera parameters of the rectified images provided by rectifyStereoImages(I1,I2, stereoParams) ?
Hi Lucien, Currently, the parameters of the rectified images are not exposed. Could you tell me a bit more about what you are...

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I have a task of counting cement bags moving on a conveyor belt and displaying the count. Is it possible to count the bags by processing a recorded video of the process?
Hi Sankara, Is your camera stationary? If so, then take a look at <http://www.mathworks.com/help/vision/examples/motion-base...

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How to find similar or identical images into two directories?
If you are looking for identical images, then you can simply read each pair of images and check for element-wise equality. Other...

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Sources of error to calculate X, Y Z distances using stereo when disparity map seems alright.
Hi Meghana, I am glad that you have been able to get a good reconstruction. Regarding the distance, keep in mind that the ori...

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how can I draw a rectangle on a image?
Hi Biza, Try using the |insertShape| function in the Computer Vision System Toolbox.

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is the calibration parameters differs when the distance between camera and check board pattern varies?
Hi Ram, Could you please clarify which camera parameters you are talking about? Intrinsic camera parameters (optical center a...

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