Answered
readFrame is only reading half of of my video frames
it is probably because the frame rate of the video is detected as 15 fps v=VideoReader('crosswalk.mp4'); t=0; while hasFrame(...

alrededor de 1 año ago | 1

| accepted

Answered
moving an image across the screen along some vector path
try using circshift https://de.mathworks.com/help/matlab/ref/circshift.html

alrededor de 1 año ago | 0

Answered
How to segment wbc using k means clustering (I=4)
wbc ? white blood cells ? use regionprops (https://de.mathworks.com/help/images/ref/regionprops.html) on a binary image

alrededor de 1 año ago | 0

Answered
Extract non-touching regions from image
You can try using imerode on the blobs. eroded_image = imerode(binary_image,[1 0 1; 1 0 1; 1 0 1]); % this will "shrink" the im...

alrededor de 1 año ago | 0

Answered
how to plot a contour plot with excel data??
from the folder containing your excel file run the error about Z may be related to the fact that contour is waiting for a missi...

alrededor de 1 año ago | 0

Answered
How to label your peaks in descending order?
something like this ? my guess is that you won't need the sortedX because you are looking for peaks on your Y axis, right ? But...

alrededor de 1 año ago | 0

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Answered
Frequency response signal - resonce frequency
Based on the info provided I came up with this, you basically have to use the pwelch function and set some sampling rate (which ...

alrededor de 1 año ago | 0

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Question


losing CData after replotting image in subplot ?
I am making a montage of image panels, which look like BW but are not binary. I am then taking the CData of the montage and , ...

alrededor de 1 año ago | 1 answer | 0

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answer

Answered
How can I get a loop to process all ".avi" files in a folder, then produce the corresponding ".txt" and ".png" file?
clear; close all; [logfname, pathname] = uigetfile('*.mat','Pick any AVI file'); cd(pathname); %make list of AVI files in t...

alrededor de 1 año ago | 0

Question


control stepper motor using MATLAB and Arduino
I am trying to set up a stepper motor connected to an Arduino Uno with motor shield mounted on it. The motor works through Ardu...

alrededor de 1 año ago | 0 answers | 0

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Question


change table var type
How can I change the variable type in a table from double to string ? I found plenty of posts with the same issue but during i...

más de 1 año ago | 2 answers | 0

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Question


can't install NI-DAQmx toolbox on MATLAB 2020b
Just got a fresh new installation of MATLAB 2020b with server license on campus. I am trying to install the Data Acquisition To...

más de 1 año ago | 2 answers | 0

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Answered
How can i make vector lengths the same?
To solve a similar issue I use imresize First get the size of the image (with the function "size"), then resize image 2 accor...

más de 1 año ago | 0

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Question


can I have independent analog output and digital counter output in the same session ?
Hi everyone I have a setup with both recording and stimulating electrodes. I would like to record the effects of a certain stim...

más de 1 año ago | 0 answers | 0

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Answered
How to get pixel index / x,y coordinates of bright regions?
binarize the image, use regionprops, get the PixelList properties and use bwconncomp to identfy separate objects in the selecte...

más de 1 año ago | 0

Question


How to match pixel locations to blob identity with region props
I am using regionprops to identify blobs in a binary image. I am able to detect a couple of blobs, get their centroids and all t...

más de 1 año ago | 1 answer | 0

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Question


how can I trace a ROI with fixed size on multiple images ?
I am trying to register images from a stack. they are frames taken from a video in which an object is moving. I tried to use the...

casi 2 años ago | 0 answers | 0

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Answered
How do you send a digital signal as an output to NI DAQ system?
See the properties of your daq by typing its device name in command line. See how the channels are called and which types you ha...

casi 2 años ago | 0

Answered
Matlab crashes every time I copy a (even small) number of blocks to my Simulink model
Are you running Matlab with admin rights? I experienced similar issues when I wasn't. See if it works.

casi 2 años ago | 0

Answered
Using APP designer to communicate with the GIGE camera
You can combine VideoReader function with image binarization and extract "blobs" of a desired frame at a time. From the blobs Ma...

casi 2 años ago | 0

Answered
How to swap between X, Y and Z in 3D plot
the function permute rearranges the order of the axes. S = permute(S,[1 2 3]); S1 = S = permute(S,[3 1 2]); % swapped matrix

casi 2 años ago | 0

Answered
how do you count points on a graph
use getpts https://de.mathworks.com/help/images/ref/getpts.html

casi 2 años ago | 0

Answered
Power Spectra estimation after FFT
try this example: sampling_freq = 5000 window = 8192, noverlap = 4096, nfft = 8192, [p,f] = pwelch(your_signal, 8192,409...

casi 2 años ago | 0

| accepted

Question


error in matlab arithmetic operations ?
I am puzzled by the result of this operation in matlab: I have a var that equals 3 I am trying to calculate (var-1)*60 instea...

casi 2 años ago | 1 answer | 0

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Question


add row to table in app designer - works ... but not completely
I am trying to add rows to a table by clicking a button in a GUI the code is as follows: the table is first initialized through...

casi 2 años ago | 1 answer | 0

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answer

Question


how to add a single element to a table in app designer ?
this line adds one element to the first cell of the table (if the content is numeric) app.UITable.Data = [app.UITable.Data(:);a...

casi 2 años ago | 1 answer | 0

1

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Question


how to skip spinner values based on variable/button ?
I have a spinner associated to a button I would like this button to be inactive for spinner values "during" which I pressed ano...

casi 2 años ago | 0 answers | 0

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Question


how to update progress gauge based on analyze progress in App designer GUI ?
I am trying to use a gui to go through some data and analyze segments of them. I am able to select different segments using a s...

casi 2 años ago | 0 answers | 0

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Question


how can I set spinner limit range based on text box entry ?
I have a gui with a spinner in it I would like to input a value in a text box and use it as upper limit for the spinner can't ...

casi 2 años ago | 1 answer | 0

1

answer

Answered
How to read spectrogram outputs and pick out interesting time-window?
the spectrogram can be handled as a surf plot if f is the freq you get out of the spectrogram fs is the freq range of you segme...

casi 2 años ago | 0

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