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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...

oltre 10 anni fa | 0

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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 ...

oltre 10 anni fa | 0

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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...

oltre 10 anni fa | 1

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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...

oltre 10 anni fa | 0

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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 ...

oltre 10 anni fa | 0

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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...

oltre 10 anni fa | 2

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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...

oltre 10 anni fa | 0

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

oltre 10 anni fa | 0

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

oltre 10 anni fa | 0

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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...

oltre 10 anni fa | 0

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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...

oltre 10 anni fa | 0

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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.

oltre 10 anni fa | 0

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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.

oltre 10 anni fa | 0

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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...

oltre 10 anni fa | 1

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Risposto
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...

oltre 10 anni fa | 0

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

oltre 10 anni fa | 1

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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...

oltre 10 anni fa | 0

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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...

oltre 10 anni fa | 1

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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 ...

oltre 10 anni fa | 0

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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|.

oltre 10 anni fa | 0

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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...

oltre 10 anni fa | 1

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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 ...

oltre 10 anni fa | 1

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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...

oltre 10 anni fa | 0

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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...

oltre 10 anni fa | 0

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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...

oltre 10 anni fa | 0

Risposto
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...

oltre 10 anni fa | 0

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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...

oltre 10 anni fa | 0

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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...

oltre 10 anni fa | 0

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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.

oltre 10 anni fa | 0

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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...

oltre 10 anni fa | 0

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