A model of three-dimensional reconstruction of license plate image is proposed in lack frame environment based on brightness space equalization smoothing and curve segmentation. According to the shortage of frame vehicle environmental external contour rectangular model

extract the occlusion vehicle line segmentation

spatial luminance equalization processing

for shielding plate curve segmentation of license plate image

and enhance the hue and saturation of 3D reconstruction. Through the enhancement of image contrast and interdiction

the high frequency signal

realize smooth image processing is taken

using the curve segmentation algorithm for image of two value segmentation

the impurity removal after segmentation of vehicle parts is obtained

get the vehicle area complete independence

realize the lack of 3D reconstruction of license plate image frame environment improvement.