Answered
How to made a graph of two images?
Could you please be a bit more specific? Are you trying to determine whether two images contain the same object? Whether they a...

9 years ago | 0

Answered
How can I set the landmarks for different facial components like (eyebrow, eye, nose & lips) on a front posed face image (neutral emotion) and how to track the points of those fixed landmarks on the front posed face image of (different emotions) ?
Hi Swaminathan, You can use |vision.CascadeObjectDetector| in the Computer Vision System Toolbox to detect faces, eyes, noses...

9 years ago | 0

Answered
Error generating samples for cascade classifier training
Hi Ferran, Essentially, this error means that the first stage of your classifier has a very high false negative rate. In othe...

9 years ago | 0

| accepted

Answered
Is there any Matlab video tutorial that gives a full guide line on "how-to "creating an image database for training under supervised learning
I don't know about a video tutorial, but there is an <http://www.mathworks.com/help/vision/ug/label-images-for-classification-mo...

9 years ago | 0

| accepted

Answered
how can do a process on some images in a loop process while these images are not like a sequence?
If you have MATLAB R2014b or later and the Computer Vision System Toolobx, then try using <http://www.mathworks.com/help/vision/...

9 years ago | 0

Answered
How to extract head region of a motocyclist wearing helmet from an image for further computation
Try |vision.CascadeObjectDetector| in the Computer Vision System Toolbox. If detecting the face does not work well because of th...

9 years ago | 1

Answered
How to apply SVM train for group of pictures after extracting HOG features?
Hi Abu, The following <http://www.mathworks.com/help/vision/examples/digit-classification-using-hog-features.html example> sh...

9 years ago | 0

Answered
How to obtain centroids from cascade object detector?
Hi William, The best you can do, is to get the centroid of the box. The bounding box format is |[x, y, widht, height]|. So th...

9 years ago | 0

Answered
Camera Calibration/Parameters help - distance/pixel ratio?
Hi Yale, You can actually do better than a distance/pixel ratio. If you know the extrinsics between the camera and the plane,...

9 years ago | 0

Answered
remove extra objects detect
You can use morphological operations for that. |imopen| will remove smaller blobs. |imclose| will fill in small gaps. If there a...

9 years ago | 0

Answered
Accurate stereo reconstruction of high resolution image
Hi Meghana, I am glad that you are getting better results! There are a couple of things you can try to fill in the holes in y...

9 years ago | 0

| accepted

Answered
about the function trainCascadeObjectDetector
Hi Sun, You are correct. |trainCascadeObjectDetector| generates negative samples automatically from the negative images. The ...

9 years ago | 0

| accepted

Answered
background subtraction in video or image
You can use |vision.ForegroundDetector| object in the Computer Vision System Toolbox.

9 years ago | 0

| accepted

Answered
Error in image processing.
Hi Massimo, As Walter pointed out, detectFASTFeatures takes a grayscale image. Please use |rgb2gray| to convert |I| to graysc...

9 years ago | 0

Answered
Calculation of distance (z-axis) to object using CVST
Hi Meghana, The first thing I see is that if your images are RGB, you are doing disparity only on the blue channel. The bette...

9 years ago | 0

Answered
Detecing and Extracting Feature/ object in vedio processing
Hi Altaf, Assuming that your camera is stationary, I would suggest using |vision.ForegroundDetector| in the Computer Vision S...

9 years ago | 0

Answered
I am getting this error while trying to store the unmatched features of a frame in brisk features extraction.. Please someone help
Hi Pritam, Walter is absolutely correct. You cannot have an array |binaryFeatures| objects. However, you can store them in a ...

9 years ago | 0

Answered
Distance between the legs of a person in an image
If you get a reasonably good segmentation of the player, you can use |regionprops| to get a tight bounding box around the figure...

9 years ago | 0

Answered
I am using MATLAB for my masters project and need to be able to locate and track shapes but I'm not sure how to do this. Any help would be much appreciated
If your camera is stationary, you can start with <http://www.mathworks.com/help/vision/examples/motion-based-multiple-object-tra...

9 years ago | 0

Answered
Improper Disparity map obtained for stereo scene reconstruction
He Meghana, Your calibration looks fine. The problem here is that the wheel is too close to the cameras. The overlap betwee...

9 years ago | 1

Answered
Slow during object tracking in video
Hi Mohammad, Try setting the. |ReturnedDataType| property of the video device object to |'uint8'|. It would also help to set...

9 years ago | 0

Answered
Slow during object tracking in video
If you post your tracking code, that would be helpful. There are any number of things that can be contributing to the bad per...

9 years ago | 0

Answered
problem in Matlab Computer vision example.
Hi Gopalkrishna, As a workaround, you can simply comment out the call to showMatchedFeatures. It is there for display only, ...

9 years ago | 0

| accepted

Answered
How to change the parameter width and height of bbox from vision.cascade object detector?
There are multiple things you can try to fix this problem: * The simplest approach is to enlarge the box returned by |vision....

9 years ago | 1

| accepted

Answered
how to find the landmark location in a face by EBGM algorithm
That depends on how you define landmarks. You can use |vision.CascadeObjectDetector| to detect eyes, nose, and mouth, which can ...

9 years ago | 0

Answered
Hello Everyone!!!! I have a project to identify a moving object in night time video...I have to tell that whether a moving object is human ,animal ,car or any other thing....?????
Here's how you may go about <http://www.mathworks.com/help/vision/examples/motion-based-multiple-object-tracking.html detecting ...

9 years ago | 0

Answered
how can i detect only the glass area for his spec
You can create another `vision.CascadeObjectDetector` object to detect the eyes, by setting |'ClassificationModel'| to |'Eye Pa...

9 years ago | 0

| accepted

Answered
how to use a point cloud in matlab
Hi Nada, The point cloud gives you 3D coordinates for (almost) every pixel, if you can detect the object in image 1, you can ...

9 years ago | 0

9 years ago | 0

Answered
3D sparse reconstruction issues. Somehow I can't get the final scatter plot of the points to work.
Hello Riccardo, The first problem you have is that you are cropping the images. Once you do that, all your coordinates are of...

9 years ago | 0

| accepted