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Apply transform on an image at lower resolution onto that of higher resolution
You have an estimate for rotation, scale, and translation. Ideally, the rotation and scale estimates that you obtain at lower sc...

casi 11 años hace | 1

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How can i detect circle in a eye image? Mainly the iris region.
You should start with imfindcircles and see if that works: http://www.mathworks.com/help/images/ref/imfindcircles.html

casi 11 años hace | 0

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Algorithm of Bicubic Interpolation
The algorithm is described in the following reference. % "Cubic Convolution Interpolation for Digital Image % Processing", R...

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Using cell arrays and find. Undefined function 'le' for input arguments of type 'cell'.
LE is the less than or equal to operator in the statement subdewfinal{i}<=dew_final1{i} These items have still not been ...

casi 11 años hace | 0

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How do I create a sub image of a larger image?
In addition to this demo, you might also take a look at roipoly. You can use the logical image returned by roipoly as a mask. h...

casi 11 años hace | 0

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How to change the pixel value of rgb unit8 image to NaN or black
I think we would need some clarifying information to answer this question. What does it mean to have a pixel value "greater" ...

casi 11 años hace | 0

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Why can't MATLAB resize an image nicely?
Would you please provide some code as to how you are displaying, resizing, and exporting the data from MATLAB so that we can bet...

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3D image registration for CT to Laser
imregister/imregtform were enhanced to support volumetric registration a few releases ago, for anyone just now coming to this th...

casi 11 años hace | 0

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Are there any documents about imregister?
The following block diagram from the doc is a good overview of the basic algorithmic approach: http://www.mathworks.com/help/...

casi 11 años hace | 2

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How does imregister work?
Marina, Thank you the feedback. The documentation for imregtform/imregister could be improved to include more information abo...

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Finding a specific edge in multiple images?
Lea, I will look into this a bit, I'm busy with other things at the moment. I do have a couple other questions for you though: ...

alrededor de 11 años hace | 0

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Question on Image transformation
Hi Mubeen, If you have R2013a, you should look at the class projective2d and the function imwarp. http://www.mathworks.c...

alrededor de 11 años hace | 1

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imtransform, tracking a projection destination of some pixel
I cannot tell from your code example what you are trying to accomplish. It's also not clear from your question how the Auto-Scal...

alrededor de 11 años hace | 1

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Performance Issue of 'imrotate' in double precision mode
Hi Dehuan, As Teja pointed out, IMROTATE was hardware optimized for double-precision inputs in R2012b. If you are able to upd...

alrededor de 11 años hace | 0

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Describe angulated slices using imref3d
Hi Wouter, The functions imref2d and imref3d are currently limited to rectilinear referencing. In your case, it sounds like t...

alrededor de 11 años hace | 1

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imregister function and affine transformation
As of R2013a, users who want access to the geometric transformation estimate computed by imregister can call the function imregt...

alrededor de 11 años hace | 0

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Can imregister provide transformation details on the registeration of the moving image?
As of R2013a, users who want access to the geometric transformation estimate computed by |imregister| can call the function |imr...

alrededor de 11 años hace | 2

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What is the difference between IMWARP and IMTRANSFORM?
The new function |imwarp| is part of a redesign of workflows involving image registration, geometric transformations, and spatia...

alrededor de 11 años hace | 3

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imregister function and affine transformation
You can use the 'DisplayOptimization' Name/Value pair to get a textual display of the transformation estimate. There is no way c...

más de 11 años hace | 0

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How to get the Region of Interest using impoly?
Look at the createMask method of impoly. For example. figure, imshow('pout.tif'); % Place polygon interactively. h...

más de 11 años hace | 1

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how to save image in axes gui?
Image Analyst's answer is great. I would only add that if the image in your GUIDE GUI has been somehow modified from the version...

casi 12 años hace | 1

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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 = ...

casi 12 años hace | 1

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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...

casi 12 años hace | 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 ...

casi 12 años hace | 0

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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: ...

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

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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...

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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...

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

alrededor de 12 años hace | 1

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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...

alrededor de 12 años hace | 0