Automatic detection method for position and dimension of speckled characteristic in digital image

• Main Authors: JIA ZONGPU, YANG LISHEN, XUE XIAO, WANG ZHIHENG, LIU HONGMIN
• Format: Patent
• Language: Chinese; English
• Published: 27.10.2010
• Subjects: CALCULATING; COMPUTING; COUNTING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS

The invention relates to an automatic detection method for position and dimension of a speckled characteristic in a digital image, which comprises the following steps: acquiring an image and inputting the image into a computer; calculating the gradient vector of each point in the image by utilizing a Gauss gradient template; carrying out inner product energy operation on the gradient vector of each point in the image and the gradient vector of each point in the adjacent region, thereby obtaining an inner product energy diagram of the image; calculating the characteristic energy of each point in the image by utilizing a group of detecting circles with different sizes, and constructing a three-dimensional characteristic energy space; determining maximum points in the three-dimensional characteristic energy space; eliminating the maximum points which are not corresponding to the speckled characteristic in the image by utilizing position relations among the maximum points; and corresponding the three-dimensional