Depth feature extraction from a 2D Image

I want to measure the Percentage(%)of waste in a waste bin by processing an image of waste bin. If I can measure the waste upper surface co-ordinate with respect to the waste bin container's top circumference then I can calculate the percentage of waste filling in the container. So how do I can measure the co-ordinate from an 2D Image in Matlab or any other software? Please help me..or please share your idea that may help to find the desired results.

Regards Shafiqul

[Prashant Somani]

For faceup area you can easily get by image processing. But it would not be possible to extract depth from sampe photograph. For that you have to capture another photograph from side and than calculate

[SHAFIQUL]

Thanks for your reply.

This is a faceup area (Waste bin container), yes I can take another photo from other side. Then how do I can calculate the depth of the bin container inner contents (Waste) level. Please share with me, I'm not an expert programmer.

[Manmeet Singh]

use transparent dustbin or someother material where..filling of garbage is visible,so that camera can caputere tht shadow.and now easily you can calculate the depth