can any one help me plaese

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charu shree 2017-8-22

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关闭： MATLAB Answer Bot 2021-8-20

i am doing a project on image forgery detection in that i want to divide an image into overlapping blocks. Pls help me with the matlab code. i need it badly.

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Farzan Farzin 2018-10-29

Hello every one is there any one to help me in MATLAB I have some questions

Walter Roberson 2018-10-29

Go ahead and post new Questions asking about your interests.

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Answer 1

KSSV 2017-8-22

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doc blockproc..

A simple google search will give you many links:

https://in.mathworks.com/matlabcentral/answers/115653-how-to-divide-the-image-into-overlapping-blocks

https://in.mathworks.com/matlabcentral/answers/58722-re-dividing-the-image-into-overlapping-blocks-using-inbuilt-matlab-functions-eg-blockproc

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charu shree 2017-8-22

@ kssv..... i had already dig entire internet from last 15 days but have not found my solution. I am not asking for ready made code. I just ask whether somebody can help me in this question. If u can help then its ok.

Jan 2017-8-23

@charu: Something goes wrong. You state, that you have shared your experiences, but I still do not find enough details in your question to allow to understand exactly, what you need. Then asking for code is not reasonable. I cannot imagine what "how does image looks after dividing in overlapping blocks" should mean and you cannot expect, that anybody is able to translate this into working code. Of course, this sentence is perfectly meaningful for you, because you know what you want. But the forum cannot read your mind.

Answer 2

Image Analyst 2017-8-22

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blockproc() can do both overlapping and non-overlapping (adjacent/tiled) blocks. See the FAQ for non-overlapping blocks: http://matlab.wikia.com/wiki/FAQ#How_do_I_split_an_image_into_non-overlapping_blocks.3F

Also see my two attached demos.

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Image Analyst 2017-8-22

charu, I did give you code that is a good start - feel free to adapt as needed. Use the example where I made a custom function that gets called on each block. You replace that function with your specific forgery detection code. And you change the block sizes and overlaps to what you need. Not hard.

If you want to hire someone to give you exactly what you want, feel free to do that too. Being one of the most experienced MATLAB image processing people in the world, I probably do know how to help you, given enough information. Unfortunately however, none of us here can help you yet because

you did not provide your image
you did not specify the block size (vertical and horizontal)
you did not specify the number of pixels that the blocks should overlap each other.
you have not read this link yet.

Happy to help if you give us something that we can help with. Though no one here is willing to spend a huge amount of time to help you. Typically we'll spend a few minutes to help you. If people ask for something that would take hours, well, that's just too much to ask a volunteer (not that yours would take that long, but we need something to work with, and we have nothing yet).

charu shree 2017-8-23

@ image analyst ..... i am sorry that i demanded for code. But really i am trying so hard and still unable to divide the image into overlapping blocks. 1. can yo tell me out of two demo files which one is for overlapping and which is for non overlapping blocks.

Image Analyst 2017-8-24

Have you tried the 'border' option to adjust the number of pixels to overlap the tiles by?

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