Features of aerial photography

Since the position of the shooting point of aerial photography can be adjusted arbitrarily in the vast sky according to actual needs, this greatly facilitates the photographer's choice. He or she can take vertical photography of the crime scene in the air. You can also take oblique photography of crime scenes from the air.

Vertical aerial photography is to place the optical axis of the camera lens perpendicular to the ground (water surface) to capture the scenery observed directly above the crime scene. Its characteristics are: first, the image proportions of various objects in the frame are basically the same, and the relationship and position of the ground targets reflected in the frame are generally the same as the actual conditions of the ground scenery, just like the regional plan; second, vertical aerial photography is to shoot the target directly. It is performed from the top, so generally there will be no situation where one part of the target is blocked by another part of the target, and it can more fully reflect the real situation of the crime scene. However, the captured image is relatively flat and the three-dimensional effect is relatively poor. Oblique aerial photography means that the optical axis of the camera lens is tilted at a certain angle with the ground, and pictures are taken from the side above the crime scene.

Its characteristics are:

Firstly, the photographic screen can not only reflect the profile of the target, but also directly display the ups and downs of the terrain and features;

Second, when taking pictures of the same scene at the same height, the scope of the scene contained is larger than that of vertical aerial photography. The three-dimensional effect of the crime scene photographed by this method is more obvious, and the effect of bird's-eye photography can be obtained. In the bird's-eye view, the horizon basically disappears, reflecting the geographical distribution and shape of the ground scenery.