The role of take-off photography

Eliminate the projection of the subject due to illumination. When analyzing the application of off-camera photography in material evidence photography, off-camera photography can eliminate the projection of the photographed object caused by illumination, clearly display the edge characteristics of the object image outline, and is beneficial to the identification and inspection of material evidence. Shadow photography is an extremely important way to deal with material evidence in criminal photography. It uses the optical principle to change the light distribution mode to eliminate the influence of shadows on physical evidence, and is mostly used for three-dimensional objects.