关键词: 矩不变, 像距, 图像梯度, 灰度标准差

Abstract: Aiming at the problem that depth information acquisition method for the traditional moment-preserving universality is insufficient and edge is not ideal in practical applications, an improved moment-preserving depth information acquisition method is proposed. First, it gets the two images at different positions by changing the image distance and aperture parameters. Then it uses the method which is based on a combination of the image gradient and gray-scale standard deviation for detecting the edge of each image. Finally, according to the gradient image representing the ratio of the whole image, it calculates depth information. Experimental results show that the algorithm improves edge detection effect, reducing the amount of computation to improve the distance estimation accuracy and real-time.

Key words: moment-preserving, image distance, image gradient, gray-scale standard deviation