s/w to "cut" differences between images

J

JohnFol

New member
Morning all, a question that is best explained with a few pictures. Image I have 2 pictures; one with a Cat and Bird, the other with just a cat

bird.jpg

Does elements (or any other suggestions) have any feature that will look at the "differences" and just give me a picture with (in this case) just the purple bird?
 
Fred Kingston_RIP

Fred Kingston_RIP

Senior Member
Yes... I haven't done it...because I don't use Elements if I don't have too...What you're looking for is what's called "layers"... there are plenty of tutorials/videos on using layers on the internet...google is you friend... You basically create separate layers, each image on a separate layer... at that point, you basically have two separate images and can do with as you please...
 
J

JohnFol

New member
I've experimented with layers, and from your reply I think you are suggesting I have 1 layer for the cat and one layer for the cat and bird.

What I'm after is for elements / whatever to generate a 3rd layer containing just the bird i.e. subtract one layer from the other. Is this what you mean?
 
J

JohnFol

New member
Here's a better explanation.

Layer 1 is MyCat.jpg and has just the cat
Layer 2 is MyCatAndBird.jpg and has both the cat and the additional bird

bird 2.jpg

Will Elements / whatever be able to calculate JustBird.jpg (or a layer or an in memory image) of just the bird by "subtracting" one image from the other?
 
BackdoorArts

BackdoorArts

Senior Member
Put them into 2 layers and use a blend mode of Divide. Layers have to be exactly the same otherwise, or you'll get some stray bits. Then, hit Cmd-Option-Shift-E (Mac) or Ctrl-Alt-Shift-E (PC) to create the new layer.

There is no "automatic" way of doing it, though you could likely create an Action to do it repeatedly.
 
A

aroy

Senior Member
Though I cannot pin point the relevant software, there are image processing software which do just what you want. In fact adding, subtracting and blending is a routine affair in these software. Just search the net for them. In my case I mostly write my own software for satellite image processing (that is how I got to know what you want).

Some software will do blind operations, that is they expect every thing to be aligned, while more advanced one do pattern recognition and scale-align-colour match before carrying out these operations.

I hope that this helps you.

Here are some useful links

SIOX: Simple Interactive Object Extraction
Extracting Objects From Images
 
Last edited:
Top