Photogrammetry method and device for body type data of field Yangtze River cowfish

The invention provides a photogrammetry method and a photogrammetry device for body type data of a field Yangtze River cowfish. The method comprises the following steps: preparing a scale buoy device and aerial photography unmanned aerial vehicle equipment, determining a take-off point of an aerial photography unmanned aerial vehicle, setting shooting during aerial photography of the unmanned aerial vehicle, selecting an aerial photography image and determining a focal height, shooting the scale buoy image, and measuring the body type of the field cowfish image. The method belongs to a non-invasive and indirect sampling method, the survival habits and activity rules of the field cowfishes are not influenced in implementation, no negative influence is caused on the Yangtze River cowfishes and the natural ecological environment, and compared with a traditional large whale measuring method, the method has the advantages of being safe, stable and environmentally friendly. The device provided by the invention is l