Input: A $2$D image

Output: A $2$D image with certain highlighted areas.

Problem: We have a $2$D image and need to determine the minimum locations where we must introduce a third dimension to visualize the object accurately. Suppose, input$1.$jpg represents the initial input, and output$1.$jpg is the resulting image. input$2.$jpg is another input, and output$2.$jpg is the corresponding output. The orange lines indicate the regions where we need to incorporate the third directional view to properly visualize the object from any angle. Without views from these positions, the object remains incomplete.