The research is focused on depth evaluation using a single camera. 2D images can be used for finding the depth of a particular object in the image. Algorithm uses marker(s) to update its orientation and to compute the distance. Initially the shape of the marker is fixed and is pre-defined but as the research expands improvements will make the algorithm to work autonomously using everyday objects as markers. Secondly, the approach is not dependent upon expensive equipment and overall computation cost is also low. Ultimately the algorithm is capable of producing the output in just a few seconds with almost 91.84% accuracy.