Find the significant outer boundary in image which is coloured

I have some coloured high defination images but in those images,i have got outer white regions which are less significant.Now, I want to remove those white regions and stitch the images together to get a single coloured image.I would really appreciate the help especially regarding the removal of non-sigificant outer white region.

[KSSV]

Attaching images will help us to help you.....

[Image Analyst]

Use the Image Processing Toolbox

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

Answer 1

[jim peyton]

Shamweel,

It sounds like the core of this task falls into the category of "image segmentation". The image processing toolbox provides segmentation tools. You might also be able to find example code or write your own simple binary thresholding function.

If the background is white, it seems like you could calculate the vector length from your three color channels sqrt(R^2+G^2+B^2) and set all values above a threshold to NaNs.

I'm not sure that I understand the part about stitching to offer much there. Good luck.

Answer 2

[Image Analyst]

Try panoramic stitiching: http://www.crisluengo.net/index.php/archives/76

https://www.mathworks.com/help/vision/examples/feature-based-panoramic-image-stitching.html

https://www.mathworks.com/search/site_search.html?suggestion=&c%5B%5D=entire_site&q=panorama