The optical image grading method is of interest for surveying & mapping satellite data users.For the scale

re- solution

signal-to-noise ratio

modulation Transfer function(MTF) cannot clearly reflect the mapping application capacity of the image. In this paper

we propose an image quality grading method based on characteristic features

which are usable in a the stereoscopic environment. Based on the psychological principles of physics

learn national image interpretability rating scales (NIIRS) criterion generation step

a psychophysical test is designed and implemented in the stereoscopic environment

characteristic features that is labeled in the topographic map specification are selected as candidate criterion

and aviation and aerospace stereo images are selected to build sample database

32 operaters take part in test

and a grading specification composed by the stereo pair

mapping criteria and scores is generated.