Image data acquisition at traffic accident scene and processing method thereof

The invention belongs to the field of digital image processing technology and relates to an image data information collection at a traffic accident scene and a processing method thereof. A fixed structure is used to adjust the angles of four laser range finders, so as to form a quadrangle laser target around the traffic accident scene. A camera is used to take accident scene photographs with the laser target and to record the distance, shooting angles and other geometric scene information of the laser target relative to the laser range finder. Based on the method of simplified direct linear transformation, the laser target of the image is regarded as a calibration object to establish the transformation relationship between an image space and a object space; based on the transformation relationship established and the allowable error threshold values, the image transformation on all pixels of the image can be made to get an orthographic projection image of the traffic accident scene. Finally, based on the conversion relationship between the pixel length and the actual geometrical length, the image of the traffic accident scene with the same size of the traffic accident scene can be obtained. The invention is mainly used in major traffic accidents and can meet the application requirements of the rapid investigation at the traffic accident scene.