Analyzing a large orthophoto block by block

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IPlover 2014-6-17

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https://ww2.mathworks.cn/matlabcentral/answers/134869-analyzing-a-large-orthophoto-block-by-block

评论： Image Analyst 2014-6-21

I am trying to apply an algorithm to an orthophoto (6560x5550x3). Since it has lot of details in it, i want to analyze it in parts. I've tried using "blockproc function" in MATLAB, but i am not able to get any block of original orthophoto.

If there is some other way apart from blockproc then please suggest.

Thanks

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Image Analyst 2014-6-18

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I don't know why. Can you explain why? Who cares if your algorithm have lots of details - just call nlfilter(). Any reason why nlfilter() can't do the job?

FAQ: http://matlab.wikia.com/wiki/FAQ#How_do_I_split_an_image_into_non-overlapping_blocks.3F

I also have some blockproc demos for you that I can attach, if I hear from you a good reason why you require blockproc().

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IPlover 2014-6-21

Sir, The algorithm accounts for shadow, roof surface available (bright and not), roof features (i.e. chimneys or walls) and azimuthal angle of the buildings in the image. Basically, i am identifying only the rooftops of buildings.

I tried using blockproc_demos but it says out of memory everytime. I will try the normal scanning window approach.

Please tell me the new ones.