Answered
A problem in using imhist to display histogram of indexed image
This is a bug that's been part of imhist() for a very long time. When fed an integer-class indexed image, the colorbar will be ...

1 month ago | 0

Answered
Make only the highest values of grayscale image transparent
I'm going to assume that the goal is to combine two images of the same page geometry and then save the result. If the end goal ...

1 month ago | 0

Answered
Matrix of fading colors
Loops aren't needed. % don't embed parameters into the code outsize = [256 256]; % [y x] % i'm assuming we live prior to R2...

2 months ago | 0

Answered
Reading image into 16 bit signed int
There's no elegant and succinct way of doing this with base tools alone, considering that you'll potentially need to support mul...

2 months ago | 0

Answered
how to convert a monochrome image of depth 24 bits into a monochrome image of depth 8 bits ?
Here's a more comprehensive example which should handle both unsigned and signed integers. Attached are two demo images. One i...

2 months ago | 0

Answered
How can I save a 32 bit image (uint32) as a tiff?
Here's a simple demo that should demonstrate writing odd numeric classes to a TIFF. This supports 8,16, and 32 bit signed and u...

2 months ago | 0

Answered
Normalizing by means of zero-mean
I'm going to stick this here and close the duplicate threads. What's missing from this form of the question is that the input i...

2 months ago | 0

Answered
How to find a polygon in an image
This is largely assembled from existing examples. I'm sure we can find a way to break it, but this image is pretty forgiving. ...

2 months ago | 0

Answered
Imfuse 'blend' issues
Like most cases, I don't see the point of using imfuse() here. If you're treating the images as if they're binarized, make sure...

2 months ago | 0

Answered
Bluewhitered function in tiledlayout environment
Unlike other map generators, bluewhitered() depends on the caxis of the current axes. You need to generate the map after you se...

2 months ago | 1

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Answered
How can i change ppm image resolution when I using Imread?
Good gravy. I finally figured out what you're doing. You're writing your PPM files using 'maxvalue' set to 1023. This is wh...

2 months ago | 2

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Answered
error
We know the following: You get a warning that a specific user-created (or downloaded) filename is preventing the use of a built...

2 months ago | 0

Answered
how to get the pixel value of histogram?
You have the bin values. You know which bins you want. Why are you zeroing the histogram counts instead of changing the image?...

2 months ago | 0

Answered
Make an image darker with overlay of another image
If your images are in standard scale (i.e. correctly scaled for their class), then I don't see why you'd be using imagesc() to d...

2 months ago | 0

Answered
Coor image enhancement in spatial domain
"Enhance" is shorthand for "read my mind and do whatever it is that I want but haven't spent enough thought to formally conceive...

2 months ago | 0

Answered
Drag histogram to adjust contrast
You're asking for a graphical image adjustment tool while simultaneously asserting that you can't use the extant ones because yo...

2 months ago | 0

Answered
Poor imshow image quality
The image is being drawn into a TiledLayout with the default wide padding and tile spacing. A ton of space is being wasted. ...

2 months ago | 0

Question

How to report/flag a user or a ThingSpeak channel?
When I find spammers, I often tend to check their profile to see what else needs cleaned up. Occasionally there are accounts li...

2 months ago | 1 answer | 0

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answer

Answered
finding 4 neighbor of pixel in grayscale image.
Disregarding edges, the 4-neighbors of a pixel IM(y,x) are obviously %IM(y,x+[-1 1]) % horizontally-adjacent pair %IM(y+[-1 1]...

2 months ago | 0

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Answered
Input is a valid integer
Assuming the input x is a char vector from input() which represents a numeric scalar: isvalidnumber('56') % positive scalar int...

2 months ago | 0

Answered
Unequal, custom, non-evenly spaced colorbar intervals
It can be done, but it's annoying to do. A lot of people take shortcuts and represent nonuniform intervals with uniform colorba...

2 months ago | 0

Answered
How can one use a variable to set color of a line plot , and use colorbar?
Here's a simpler way to do it using patch(). % the data as given load koordmean load anx % the coordinate data x = koor...

2 months ago | 0

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Answered
how to use drawcircle methods with centroids array from bwconncomp
You're repeatedly overwriting h before you do anything with it. It's not clear what you expect to happen. If you just want the...

2 months ago | 0

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Answered
how to plot the data over an image of graph to validate the data?
You can plot things over an image, but good luck guessing whether or not your image features actually line up with the coordinat...

2 months ago | 1

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Answered
why file did not appear
Maybe it has something to do with that big red error because you created an invalid file name.

2 months ago | 1

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how to get Integrated circuit pads in image?
This is not robust or applicable to other images or types of packages % read the image inpict = imread('https://www.mathworks....

2 months ago | 0

Answered
extracting values from an image with color legend
% the image inpict = imread('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1699336/image.png'); % extract...

2 months ago | 0

Answered
Weird Imhist beahviour seen
I don't know where everyone is getting uint12-scale images, but I guess it's a thing. I posted an example which demonstrates th...

2 months ago | 2

Answered
Problem with Imhist method
I saw this last night and threw together a demo when I was making the demos for the webdocs. The majority of the work here was ...

2 months ago | 1

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Answered
Why does imhist() do this?
We'll see what shakes on the bug report. I was already writing around imhist() in the MIMT tool, expecting to come back and m...

2 months ago | 2