Answered
Comparing images
The results you are getting indicate that you are working with 8-bit unsigned integer data. a = uint8(10*rand(3,3)) b = ...

13 years ago | 1

Answered
How to rotate an image using interpolation?
If you want to apply pure rotation to an image, there is a specific Image Processing Toolbox function imrotate that will do this...

13 years ago | 0

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regarding cropping a polygon out of an image
Also, if you DO intend to apply a polygon mask to an image, there are easier ways of doing it. The function roipoly is designed ...

13 years ago | 0

Answered
How do I get a colormap for my image?
The metadata associated with your image is indicating that your data is already an RGB image with separate RGB planes: ...

13 years ago | 0

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Answered
About "projective" command
Yes, The functions tformfwd and tforminv are what you are looking for. help tformfwd help tforminv You can calcula...

13 years ago | 0

Answered
Image is too big to fit on screen!
The "thin dark line" that was displayed sounds like what happens when you accidentally display image data that has been shaped t...

13 years ago | 0

Answered
imshow in GUI too slow
If performance is critical, you would do well to refresh the images via setting the 'CData' of each existing image handle rather...

13 years ago | 3

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Answered
Computing eigenvector of eigensystem
Check out the documentation for the eig function. doc eig

13 years ago | 1

Answered
Accessing object B properties outisde of object A's getter method
Sounds like your class objA should define a property that holds the object(s) you need to define your get operation. classd...

13 years ago | 0

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how to register a medical image in matlab
Siva, If you are using R2012a, you might also check out the new function imregister. This function can be used to perform aut...

13 years ago | 0

Answered
sum of absolute differences
If you have the Image Processing Toolbox, consider looking at the function imabsdiff as a starting point for computing the absol...

13 years ago | 1

Answered
Difference between imresize & resizem
David, Both functions will perform the resize operation you are interested in. resizem is a Mapping Toolbox function. imresiz...

13 years ago | 0

Answered
drawing bounding box from corne rpoints
How about: imshow('pout.tif'); points = 200*rand(50,2); hold on plot(points(:,1),points(:,2),'r*'); % Now use min/m...

13 years ago | 0

Answered
separating object and bacground with imsubtract
I just wanted to add, as whenever this issue comes up, that Image Analyst's solution of using the MATLAB minus operator instead ...

14 years ago | 0

Answered
How does getPosition work in impoly?
Regarding "updating the polygon position". I'm still not fully understanding the question, but Matt has already provided good an...

14 years ago | 1

Answered
extractFeatures, reference to "Block"-method
I'm not sure about where to find a good reference at the moment, if you're looking for a paper, but if you look in the reference...

14 years ago | 0

Answered
image format question
When you say that "a new window came up, but no image was displayed", the most likely cause of this is that the 'DisplayRange' p...

14 years ago | 0

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Answered
selective bwdist()
You all have seen Steve's blog post, so you know the answer. But, for anyone who comes to this post with a similar question, we ...

14 years ago | 1

Answered
creating an image using a matrix
The createMask method of the ROI tools was designed for the case in which you want to generate a binary image that is one where ...

14 years ago | 1

Answered
Problem Matlab Ubuntu
To get an answer to your question, you should set a breakpoint at the line where you are calling imread. Examine the full path a...

14 years ago | 0

Answered
job timer
Check out the MATLAB function waitbar: http://www.mathworks.com/help/techdoc/ref/waitbar.html

14 years ago | 0

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Answered
what is the difference between conv2, filter2 and imfilter..?
Hi Jigar, Good question, and everyone else has provided a lot of great information. I'd like to add a bit, hopefully it'll b...

14 years ago | 4

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error using imsubtract
Megah, I'd also recommend that you use the MATLAB minus operator instead of imsubtract to perform elementwise subtraction on ...

14 years ago | 1

Answered
cropping
Chitra, If you have the Image Processing Toolbox, you can also use the function imcrop: http://www.mathworks.com/help/tool...

14 years ago | 0

Answered
Multiple Colormaps, freezeColors won't work
Hi, The issue here is that in the MATLAB graphics system, the 'colormap' is a property of the figure, meaning that you can only...

14 years ago | 0

Answered
get position of imfreehand
Hi Mary, Unfortunately, the current design of imfreehand doesn't allow programmatic placement of the tool given a set of vertic...

14 years ago | 1

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Answered
getting the variable size value
[R,C] = size(A); doc size

14 years ago | 0

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Answered
iptPointerManager significantly slows program down
Hi Jonas, Without having a complete example of your implementation of a draggable line, this is tough to answer, but I'd lik...

14 years ago | 0

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Image processing help. Multiplication of Images gives different results at Unit16, unit 32, unit 8.
Hi Vijay, Walter's answer is accurate. I just wanted to add that since you have the Image Processing Toolbox, you might look ...

14 years ago | 0

Answered
fill inside a boundary
Hi Azarm, A good way to solve this problem will be to obtain a logical image that represents the boundaries of the first fram...

14 years ago | 0

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