Ideal knife-edge image and real remote sensing images were selected as the original image

and a series of degraded images were obtained through applying a various of radiation and geometric resampling operation on these original images. Then the MTF （modulation transfer function） evaluation was performed using the original image and all of degeneration images based on slant edge method. Experiments show that

in evaluating MTF of the imaging system

proper radiation resampling operation can be performed on the image for the visual effect

which will not affect the imaging system MTF

but the geometric resampling can seriously affect the MTF of imaging system.