How to combine images (just overlap all paixels)

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sgb 2013-4-21

I need to overlap 4 images to yield a final single image to find the image edge.

I have only binary images. Do we have any built in functions for it?

Please help me find out the correct method.

Image Analyst 2013-4-21

编辑：Image Analyst 2013-4-21

Yes, you can use imshowpair(), or imfuse() - functions included in the Image Processing Toolbox.

Or, you can simply AND or OR the binary images together:

unionBlobs = bw1 | bw2 | bw3 | bw4;
intersectionBlobs = bw1 & bw2 & bw3 & bw4;

sgb 2013-4-22

编辑：sgb 2013-4-22

Yes i got it Thank you

But can you please solve another doubt for me which is how can we EX-OR the images

Image Analyst 2013-4-22

From the help:

xor
Logical exclusive-OR
Syntax
C = xor(A, B)

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