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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...

3 years ago | 0

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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...

3 years ago | 0

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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. ...

3 years ago | 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...

3 years ago | 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...

3 years ago | 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.

3 years ago | 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...

3 years ago | 0

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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 ...

3 years ago | 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...

3 years ago | 0

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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 ...

3 years ago | 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...

3 years ago | 0

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Identify the special area in low-contrast image
Try activecontour

3 years ago | 0

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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...

3 years ago | 0

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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_...

3 years ago | 0

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does matlab version 2021a have forecast command !!!!
See the links at the right side of this page, for example https://www.mathworks.com/help/econ/msvar.forecast.html?s_tid=answers...

3 years ago | 1

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plot a square which has circles inside it
One way is to just have a matrix of (x,y) location of the centers that got placed. Then have a loop of, say, a million iteratio...

3 years ago | 0

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printing nxnxn matrix into a file
You can't. The .mat file is a proprietary format, and I think it's binary. So the numbers are just in there and it doesn't mak...

3 years ago | 1

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how to take random words from a sting matrix
"id also like to do something similar where i take a random number from a 1x20 array and asign it to a variable" Try this: you...

3 years ago | 0

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import file to standalone application
How were they loaded? Did you just find all files in the current folder and load them? Did you list them all in a listbox and ...

3 years ago | 0

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How to focus my image segmentation algorithm
There is a lot of variation in your image capture setup. You can make vast improvements in it, including Lay the panels on bla...

3 years ago | 0

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How to focus my image segmentation algorithm
I'm not sure what part of the mask you want to be extracted by cropping, but you can use imcrop or indexing croppedImage = orig...

3 years ago | 0

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How do I get the outer contour from a line in an image?
I don't know what "the contour function of the line" is. I'd use the Color Thresholder app on the apps tab of the tool ribbon t...

3 years ago | 0

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Making y-axis positive in both directions
Well I think that would be confusing and deceptive to the reader. But anyway, do you want just the exponent to be positive? Yo...

3 years ago | 0

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Determine the coordinates of the nodes forming the outermost circle
Can you get the coordinates as a list of (x,y) locations? If so, get the convex hull with convexHull or convhull

3 years ago | 1

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How much Mac memory can Matlab utilize?
Try this: >> memory in the command window.

3 years ago | 0

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the size of picture show three data?
The two others said why the size is 3 times the size of the lateral dimensions (because you have 3 color channels/planes). Don'...

3 years ago | 0

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An error that repeats in my Matlab code-image classification
What tf are you using? When I look in the help it lookos like there are lots of tf functions. It looks like you're trying to c...

3 years ago | 0

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Ho to find the area of some patterns in an image
Make it easy for us to help you : attach your image or screenshot as a standard PNG format image so that we can see it right her...

3 years ago | 0

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Size of an image as a single value
"I actually meant the physical size when displyed though." That depends on the figure size. You can resize the figure to any si...

3 years ago | 1

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How CT projection image and intensity plot are related?
@Anand Ra in t = -1*(1/µ)*log(I./Io) note that I is a 2-D array, so the log is also a 2-D array, and thus t is also a 2-D ar...

3 years ago | 1