background suppression from any real time image

how to remove background image from any real time image through simulink blocksets.....

Answer 1

[Walter Roberson]

This is not possible. It is not possible for a program to automatically figure out what is foreground and what is background. As I have written before:

For example, if you are processing solar images, then if your purpose is to study the solar corona, you would be wanting to ignore "space", but if your purpose is to study Near Solar comets, you would be wanting to ignore the Sun and pay attention to fine details in "space".

[satnam singh]

sir, what if background is known and the region of interest of the image is also known?????please provide me simple example....

[Image Analyst]

Will it work if you subtract them?

[satnam singh]

sir iz not working by just substracting...

[satnam singh]

sir what if i create the white background ...and then our ROI will be just rubik's face...then how to identify the four corners of the face and depending on the four corners how to create the quadilateral bounding the rubik,s face...then dividing the qudilateral in nine equal blocks for the processing...how to do that...please suggest some program as well as the simulink model......

[Ahmed A. Selman]

Indeed as W. Roberson mentioned, if there are a group of multiple moving objects in an image (or sequence of images to be exact), and some code is needed to isolate the region of interest (ROI) only based on mathematically logical selection, the code must include a huge library of possible objects, indicating their properties as possible shapes, intensities, speeds, ..etc. Or at least a large number of variables must be included in such a way that such a code would be complicated and takes some time to run.

If we defined the meaning of a (background, BG) first, the task becomes relatively easy. This was also mentioned above with a very nice example mentioned is how to isolate a moving comet from an image of the solar corona. One time the comet is within the BG, in another it is the ROI.

However, in my opinion, for this specific example, this is programmably possible.

Answer 2

[Ahmed A. Selman]

I've tried (Embedded Matlab Function) blocks once for a similar thing, and used my own program to handle the output.