How to scale mask to the size of the object?

I have imported a point cloud to Matlab and now I have a matrix with x,y,z coordiantes of points. Coordinates are from real object and the distances between points are in milimeters. Then I did a 2D binary mask which is shaped like a cloud projected onto the X-Y plane but it has diffrent dimensions. For now I want to scale the mask to the size of the cloud an make coordinates system of mask and cloud uniform. Anybody now how to do this? I will appreciate every help.

Answer 1

[Image Analyst]

How exactly does the shape of your mask match the shape of your object? If it's close, you can use regionprops to get the sizes and then scale the mask so that its area matches that of the object, then use imregister to translate it to align it. Please post both images so I can see them.

[Struct03]

Hi, I must to change my question,because my mask isn't good. for now I'm looking for way to make a binary mask for the 2D image which contain an object and a lot of noise in background. i tried to use standard function from matlab but didnt work correctly .

[Image Analyst]

OK, how can I help?

How can you help us to help you? Read this: http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer