Image processing method, apparatus and device, and video image transmission system

An image processing method, apparatus and device, and a video image transmission system. The method can be applied to an aerial photographing system of an unmanned aerial vehicle. The method comprises: obtaining a first YUV image, the first YUV image being an image captured by a vehicle-mounted photographing device working in a Log mode (201); converting the first YUV picture into a second YUV image, the image format of the second YUV image being consistent with an image format of an image captured by the vehicle-mounted photographing device working in a Normal mode (202); and outputting the second YUV image, so that a display device presents the second YUV image (203). Photographing parameters of the aerial photographing system of the unmanned aerial vehicle can be adjusted in real time, the operations are simple, and the photographing efficiency and effect of the aerial photographing system of the unmanned aerial vehicle are improved.