Video image local rotation processing method and system, terminal and medium

The invention discloses a video image local rotation processing method and system, a terminal and a medium, and relates to the technical field of image processing, and the technical scheme is characterized in that the method comprises the steps: extracting an initial contour line of a local target in an original image, and building an extended contour line outside the initial contour line; establishing a coordinate rotation function by combining the rotation center and the rotation data; pixel data within the initial contour line and the extended contour line are correspondingly written into the empty pixel image to obtain a first image; pixel corresponding writing is carried out on an area outside the boundary contour line in the first image to obtain a second image; and carrying out pixel filling processing on the transition area to obtain a local rotation image. According to the invention, the rotated image does not have an overlapping area and a blank area, and the boundary condition before and after the