Image comparing matlab

Hi, this is the first time Im using matlab and has been pretty neat so far. This semester we have been asked to do a little proyect.

I choose to do an image comparing program.

What I want to compare is the level of diference between the 2 matrix.

For example, I have a table with 3 figures. a circle, a triangle, a square and since this pictures are taken in a gray scale whenever I take one of the objects off and take another picture, know where the object is missing. And reproduce that part of the matrix where the object is missing

I wanna know if this is feasable or how complicated it is.

Answer 1

[Image Analyst]

Just convert them to floating point, subtract them, and display them

imshow(single(image1) - single(image2), []);

It can be as simple as that. Or you could make it fancier if you want, such as applying colormaps, calling surf(), calculating the area of the difference, etc.

[omar chavez]

why is the last element [] for?

[Walter Roberson]

It indicates that automatic scaling of the image levels should be used so that the lowest value actually present will correspond to the first color in the color map, and the highest value actually present will correspond to the last color in the color map.