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1) Search for corresponding points within the overlapping image regions, e.g. using the c2select tool if you want to do it manua...

9324 views

Responded 5 years ago

Try "Geodetic Transformations" from the FEX: http://www.mathworks.de/matlabcentral/fileexchange/9696-geodetic-transformations T...

7332 views

For the sake of peace: Mea maxima culpa. I did the following test: tic for m = 1 : 100 end toc clear r tic callfoo; toc wit...

5195 views

Nor is it a problem for me to run the test PROPERLY, however, I do not need to test AGAIN, because I already did test my C/MEX i...

Because I already did a tic-toc test and experienced a speed gain of 25% (cf. my previous messages). With my last message I only...

You may be right - I don't really know whether it's really worthwhile. That's why I wanted to give it a try. Nevertheless you s...

Simple answer: I have tested this procedure on some small dataset (100 x 100 pixels) and had a speed gain of about 25%. Although...

I'm doing so only in this very case, usually I do try to code everything I want to outsource in C when using MEX. But here I wa...

As stated in some other message on the Newsreader, I implemented a subroutine that needs two nested for-loops in CMEX, doing the...

Posted 5 years ago

OK, no answers so far. In the meantime I went on with the imtransform approach. This is how it worked out for me: tform = cp2...

4219 views

I have an image matrix and know the world coordinates (e.g. in the UTM system) of its corner pixels - or any other pixels, if ne...

Is that question really so special nobody has ever come across it before? In the meantime I tried to use "getframe" and "frame2...

3732 views

I have a set of n 2D data points stored in an unordered nx3 matrix (x coordinates, y coordinates, value), which I plot to a figu...

Usually one calculates a polynomial using "polyfit" and then evaluates the polynomial at a certain position x using "polyval". ...

3266 views

Guess you're right, might've been a bit on the lazy side. Now here's the solution: [X,Y] = meshgrid([1;2],[1;2]); interpolatedV...

2959 views

I want to get the value from a matrix having only a non-integer element address without doing a simple roundoff. Example: Matri...

I used Matrix(~any(Matrix')',:) = []; for a two-dimensional n x 3 array successfully. Maybe you can adjust it to your case.

2943 views

Sleep is way overrated. ;) Just joking, you're help is very appreciated, thank you very much for your efforts! Your code helped...

2873 views

No new ideas available? I've tried all day, but I'm beginning to feel desperate... The core problem I have is the interaction o...

Ok, funnily the "size_t / mwSize" warning has disappeared, though I haven't changed anything in between... Ok, here's what I wa...

Thank you for your advice, James! I know about the indexing error in the edge case, but for the moment I was more interested in...

I am currently implementing some image processing operation that needs to be framed by two nested for-loops running over all col...

OK, ImageAnalyst, I've spent some tome thinking about my problem and your histogram matching ideas. It seems I have to go your w...

2603 views

Responded 2 years ago

Thanks, ImageAnalyst for pointing out your function, which is pretty impressive to me. However, I think it's not really possibl...

I have two (e.g. image) datasets with non-normal distribution and relatively high dynamics. I guess as some approximation we cou...

Posted 2 years ago

Many thanks for your answer. I pretty much got it work today and from a first test it seemed like I had some serious speed gain....

2523 views

It works right like I have stated. The only drawback is that every evaluated string is displayed in the Command Window which mig...

I have coded some larger project in a simple MATLAB .m-file. By now I have outsourced some time consuming parts to C using the M...

Thanks for pointing me to tcdf. From there I found also tinv. It seems what I am looking for can best be achieved by abs(x/sx)...

2368 views

I have carried out some least squares estimation procedure and hav received my resulting parameters including their standard dev...

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