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which colormap I can chose to draw these figures?
Hard to say without knowing the data values but it looks like a ramp of red and an inverse ramp of blue with white in the middle...

más de 2 años hace | 0

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How can I find the radius of this object, preferably at multiple x,y points for a consistent output?
See the FAQ: How can I fit a circle to a set of XY data or my attached function.

más de 2 años hace | 1

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Hello. Im currently creating a code in Matlab and I am running into this error that I will attach in a screenshot. I am new to Matlab so I am having trouble fixing it.
If you want to clip off the ends, use the 'same' option instead of 'full' in conv.

más de 2 años hace | 0

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Why is an upside down blue image being displayed?
It comes from image. It is using the built in image function instead of your particular image. Do NOT use "image" as the name ...

más de 2 años hace | 0

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使用guide功能中遇到的问题
For your cdirs line, use fullfile instead of brackets and see if that gets rid of the error.

más de 2 años hace | 1

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Opening "external" files in a compiled Mac program
See the FAQ: https://matlab.fandom.com/wiki/FAQ#Why_can't_my_standalone_compiled_executable_find_my_files?

más de 2 años hace | 0

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Smooth 2D data in non-regular distribution pattern for colormap-based representation
You could use the convex hull and then use linspace to create more points in between the vertices. But like I said in your othe...

más de 2 años hace | 1

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Specular Reflections Removal in endoscopic image
Try thresholding, then us regionfill Basically (untested): % Get individual color channels: [r, g, b] = imsplit(rgbImage); %...

más de 2 años hace | 0

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Computer vision needle tracking through ballistic gel.
Honestly those some of those pictures are so bad that it will be difficult to accurately find the needle. You'll accomplish you...

más de 2 años hace | 0

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How to get a smooth boundary between clusters?
I doubt you need to smooth the boundary. That would just give you as many coordinates as you had before and most likely more co...

más de 2 años hace | 0

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An automatic way to change \ with / (windows vs. unix) only for "addpath"?
@Sim the above answers are correct but only partial -- they're incomplete. I understood that you need to do this for lots of fi...

más de 2 años hace | 0

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Why do I get "Array indices must be positive integers or logical values" when I am trying to plot my functions?
See the FAQ: Subscript indices must either be real positive integers or logicals

más de 2 años hace | 1

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Setting legend of a plot
I think you'd have to build it up manually with the plot and text functions.

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Function not plotting on the app version
It should work. If you look in the workspace panel, are there variables listed there? If you have any more questions, then att...

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shade the area between curves
There is a FAQ for this: https://matlab.fandom.com/wiki/FAQ#How_do_I_shade_the_region_between_two_curves?

más de 2 años hace | 0

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How to make function that goes between points
Try readmatrix or readtable to read your data from the Excel file into MATLAB. To fit a smooth curve through the data, if it's ...

más de 2 años hace | 0

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Roots of a 4th degree polynomial and plotting a graph
Not for some arbitrary k, unless there is something in the symbolic toolbox you can use. Otherwise put k in with the other coef...

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how to plot the time series of the image intensity (greyscale values) at points P1, P2, and P3. where p1=2260,3190 ; p2= 1930,1397; p3= 1580,1937 ?
Read in a frame from your camera or video file. Then for each frame, just do color1 = rgbImage(row1, column1, :) color2 = rgb...

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How can I track the depth and angle of a needle in a box using computer vision?
I only see the needle at only one position. But I'd do something like this Crop out sub image at the known level of the tube. ...

más de 2 años hace | 1

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How to find depth map image by using a single image......?????
See papers on the topic here: http://www.visionbib.com/bibliography/contentsshapefrom.html#3-D%20Shape%20from%20X%20--%20Shadin...

más de 2 años hace | 0

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How to run standalone application from the folder where it is located?
It sounds like you've discovered that the directory of the app that actually runs is not the same as your executable that you de...

más de 2 años hace | 1

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Fitting dot plot using diffierent functions
What is a "dot plot"? To fit a polynomial you can use polyfit. See attached demos.

más de 2 años hace | 1

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How to display x and y axis to an image in app designer
Did you try the axis function after you called imshow? axis('on', 'image'); Under the image processing options/preferences you...

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[Image Processing] Looking for non-reference based image quality check, BRISQUE results seems untrustworthy on small patch.
Try niqe and piqe. And see https://en.wikipedia.org/wiki/Image_quality And see articles in the Image Processing Literature on ...

más de 2 años hace | 0

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Can I create images with accurate size in mm ?
Using a known distance in real world units and a measured pixel distance in your image, you can create a spatial calibration fac...

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I want to run the code examples from Psychtoolbox but I got an error message.
It looks like it's explicitly giving you a string warning that you should not use their toolbox on your computer, but gives you ...

más de 2 años hace | 2

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What is the difference between the 1st order polynomial fit and linear regression?
A linear regression means the equation is linear in the coefficients, not the variable. (Google it.) So this can be a model for...

más de 2 años hace | 0

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Identify the special area in low-contrast image
Try activecontour

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How shall I ignore the reflection in an image and select the rest of the image in a bounding box and obtain the results also automate it in order to process multiple images?
Rather than remove it, just scan across your binary image finding where it's white [rows, columns] = size(binaryImage) topRows...

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why do i get there was an error while extracting product files
See the FAQ: https://matlab.fandom.com/wiki/FAQ#During_installation,_the_installer_crashes,_hangs,_gives_an_error_message,_does_...

más de 2 años hace | 0