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**Content Feed**

Video stabilization using point feature method

No, point feature extraction is, as the name says, the extraction of features of a point. You dont have a motion estimation from...

mer än 3 år ago | 0

| accepted

how i can capture and then save many images using kinect camera at one time?

Right now you have a fixed N, in this case N=4 and if you run your code you will save the images to my_new1.png, my_new2.png, an...

mer än 3 år ago | 0

| accepted

Get Real distance value in an image.

With a given reference its possible. Either calibrate your camera to that reference and dont move it afterwards or have a known ...

mer än 3 år ago | 0

using trainCascadeObjectDetector for online game

This depends on the object you want to detect, 40 pictures might not nearly be enough. Cascade object detector can only detect o...

mer än 3 år ago | 0

Jumping from one random frame to another random frame with continuity.

Use the video file reader <https://de.mathworks.com/help/matlab/import_export/read-video-files.html> to get your frames from the...

mer än 3 år ago | 1

Eliminate point of view effects on a surface before processing the image.

If you have the camera calibration toolbox at you hand you can simply use that to calibrate your camera with the checkerboard. ...

mer än 3 år ago | 0

| accepted

HOW TO FIND OUT MAXIMUM TEMPERATURE FROM EACH FRAME(My video has 225 frames) USING MATLAB ?

See <https://de.mathworks.com/help/images/ref/mat2gray.html> mat2gray() converts a matrix to a grayscale image. If you have a...

mer än 3 år ago | 0

| accepted

Hi, I am trying to put a box around the car and have it's confidence level placed on top of the box, how can I do that?

Error using insertObjectAnnotation Expected input number 3, POSITION, to be one of these types: numeric Instead its type w...

mer än 3 år ago | 0

How can I get model coordinates from pixel coordinates, using an uncalibrated camera, if I know the model coordinates of a few pixels?

Lets assume you have point P=[X; Y; Z], then your camera coordinates of that point would be x'= X/Z and y'=Y/Z. You then project...

mer än 3 år ago | 1

| accepted

Question about how to create cameraparams object

You already linked the answer to your question: <https://www.mathworks.com/help/vision/ref/cameraparameters.html> If you get...

mer än 3 år ago | 0

Hey there, I hava a question concerning tracking of dots in multiple pictures...

Here are some links which might help you: <https://de.mathworks.com/help/vision/ref/vision.pointtracker-system-object.html> ...

mer än 3 år ago | 0

eyes and mouth edges from a Image

Take a look at this already asked question, the code there is nearly what you are looking for: <https://de.mathworks.com/matlab...

mer än 3 år ago | 0

How to use vision.PointTracker with ImageLabeler?

The vision.PointTracker does, as the name implies, tracks points (with KLT-algorithm). <https://de.mathworks.com/help/vision/...

mer än 3 år ago | 0

Specifications of Checkerboard for calibration for camera Calibration

Do you use the camera calibrator app from MATLAB? This makes it easy to calibrate the camera. The only thing you need to know...

mer än 3 år ago | 0

Image processing while video streaming

If this is your code then of course you will only have shown the first picture, since there is no loop to show the new image. Yo...

mer än 3 år ago | 1

How to perform Geometric Transformations on live images i.e., on video ?

Create a camera object. Create a video player object. Take snapshots in a loop and process them, then step through the pr...

mer än 3 år ago | 1

| accepted

Question

MATLAB Coder global variable error

Im trying to use the MATLAB coder to generate code from my function. When i check for errors, i get a "Could not find initial...

mer än 3 år ago | 0 answers | 0

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answersDifferentiate cars and motorcycles in image processing

Depending on your surrounding it might be possible. You could use a cascade object detector and train it to recognize motorcy...

mer än 3 år ago | 0

How can I take a snapshot from USB camera and then analyze it?

First install the support package "MATLAB Support Package for USB Webcams" ( <https://de.mathworks.com/matlabcentral/fileexchang...

mer än 3 år ago | 1

how to find which portion of the image having high contrast ?

You might want to take a look at this: <https://de.mathworks.com/help/matlab/ref/colormap.html> Also all your questions subm...

mer än 3 år ago | 0

what is wrong with this code??

imshow(insertObjectAnnotation(J1, 'rectangle', bboxes, labels)); <https://de.mathworks.com/help/vision/ref/insertobjectanno...

mer än 3 år ago | 0

processing on a live webcam streaming video???

You way to do it would be: 1: Create a webcam object EDIT: or create a cam object 2: You can get screenshots/snapsho...

mer än 3 år ago | 0

Can I undo undistortImage?

I would not recommend to try this. When you use undistortImage, some information might get lost due to the process. If you now t...

mer än 3 år ago | 0

how can I measure the distance between camera and object usingle single camera

Without a properly calibrated camera and a reference object of some sort this is not possible. You can estimate the distance wit...

mer än 3 år ago | 2

| accepted

Camera calibration using camera extrinsic parameters

You can use the Camera Calibration App: <https://de.mathworks.com/help/vision/ug/single-camera-calibrator-app.html> Or you ca...

mer än 3 år ago | 0

¿Why the webcam changes its parameter everytime i start running the code?

This is normal behavior of most cameras. They have initial starting values which are used when you connect the camera. Now i...

mer än 3 år ago | 0

How can I convert pixel coordinate to micrometer in x and y axis in an image?

Your idea is correct. Take a reference object from which you know the exact measurements and convert that to the pixel lenght. N...

mer än 3 år ago | 0

How read multiple image to Matlab memory

You could use the the Image Batch Processor if you have it at hand: <https://de.mathworks.com/help/images/batch-processing-usin...

mer än 3 år ago | 0

| accepted

I want to load a video and extract frames from it, save them and then use rgb2gray, edge detection and matching on specific frames...what will be the MATLAB commands for it??

To load a video: videoFileReader = vision.VideoFileReader('Video.avi'); Take a frame from the video: videoFrame = step(v...

mer än 3 år ago | 1

| accepted

how can i acess single lens/camera of a stereo camera in matlab?

If you can take split images for left and right just do that and add them up to your own video stream. You can run a loop, wi...

mer än 3 år ago | 1

| accepted