Photographic methods of aerial photography

Aircraft preparation: At present, only a few public security organs have flight equipment. For example, the helicopter brigade of Dalian Public Security Bureau is equipped with the police helicopter "Dalian No.1" imported from Italy, with cruising speed of+hours and maximum range of+,which can be used for manned flight. However, most public security organs do not have flight equipment. When they encounter a serious criminal case (accident) with a particularly bad nature and need to use aerial photography, they should contact the local garrison or tourism department with the consent of the leaders of their provinces and cities. It is best to use a helicopter or a small plane (such as a bee) that is flexible, slow and can fly at low altitude for aerial photography.

Preparation of photographic equipment: To prepare enough photographic equipment, it is best to prepare two cameras and choose the appropriate shutter speed. When choosing the shutter speed, we should consider the flying speed, flying height and camera angle. Generally, when the flying speed is km/h and the flying height is high, the shutter speed of seconds can be selected for oblique photography. If the flying height decreases or the flying speed increases, the shutter speed should be increased accordingly, otherwise the slow shutter speed will cause shadow on the picture.

Determination of aerial photography route: according to the objective conditions such as the size of the scene, the relationship between the central scene and the surrounding environment, geographical environment and climatic conditions, determine the flight route, flight altitude, flight angle and flight speed together with the pilot. Only by knowing well can we complete the aerial photography task in an orderly way.

Selection of shooting position on the plane: According to the flying height and shooting angle of the plane, choose the best shooting position on the plane. When choosing a specific shooting position, the general requirement is not to block the shooting angle, but also to ensure the safety of the photographer. On-site aerial photography generally chooses daytime and uses natural light for lighting. When the lighting conditions permit, the light level of the front side light should be selected as far as possible, and the shooting time should be chosen in the morning or afternoon. Because the color temperature of the light source is relatively stable during this period, it is beneficial to truly reproduce the three-dimensional level of the scene and correctly restore the color of the scene. In different seasons, different climatic conditions and different shooting angles, the amount of light used in the scene will vary widely, and photographers should master and use it flexibly according to the actual situation such as the objective geographical environment of the scene.