CODEWITHSUNDEEP
matlabadobe-illustrator
user2861089
user2861089

Reputation: 1235

Superimpose two figures

I have two figures - one is a phylogenetic tree and the other is a skyline plot (a line plot with shaded bits).

I want to superimpose the tree onto the skyline, like this:

enter image description here

Both figures are tiff files with white backgrounds.

Is this possible with MATLAB? My line plot is made with MATLAB.

I also have illustrator (CS6) but am a complete newbie to that...

Thanks!

Upvotes: 0

Views: 526

Answers (2)

Dennis Jaheruddin
Dennis Jaheruddin

Reputation: 21563

I can't try it at the moment, but I think you want to put one image on top of eachother.

Assuming that the top image is NaN on places where you can see the second image:

idx= ~isnan(frontimage)
backimage(idx) = frontimage(idx)

You may need to do some padding or scaling first as this requires the images to be of the same size.

Upvotes: 0

rayryeng
rayryeng

Reputation: 104464

Load in both images, then merge them assuming a transparency of 0.5. As such, let's say your tree diagram was in an image called imtree and the skyline plot is in an image called imskyline. Load these into MATLAB, then simply do this sum:

out = uint8(0.5*double(imtree) + 0.5*double(imskyline));

After this, display your image using imshow(out); and see what it looks like. Hopefully this will work, as I don't have access to your actual images!

You may have to play around with the constants. Perhaps weight the tree more while the skyline plot less. If the above doesn't work, try something like:

out = uint8(0.75*double(imtree) + 0.25*double(imskyline));

Alternatively, if the above doesn't work, try doing imfuse to blend the two images together in a natural way:

out = imfuse(imtree,imskyline,'blend','Scaling','joint');

What the above code does is that it blends the images naturally, and scales the colours between the two images in such a way that they will play nicely with each other.

Upvotes: 2

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