Method and device for parameter processing for camera and image processing device

An image processing device, comprising:

• a processor;
• and
• a memory storing program instructions that, when being executed by the processor, cause the processor to
• obtain an environmental image set, the environmental image set including a first type image and two or more second type images, a direction of a light sensing element of the camera capturing the first type image being different from the direction of the light sensing element of the camera capturing the two or more second type images;
• calculate internal parameters of the camera based on a plurality of target object image points on the first type image and the two or more second type images in the environmental image set, wherein
• the image processing device is configured to process the parameters of the camera, the camera is mounted on the aircraft and configured to capture a plurality of environmental images on an environment below the aircraft, and the calculated internal parameters include a focal length of the camera.