Patent ID: 11954895
Assignee: CHENGDU UNIVERSITY OF INFORMATION TECHNOLOGY
Field: Computer technology (Electrical engineering)
Classification: CPC G  Y | IPC G

Claim 2:
3. The method for automatically identifying south troughs by Laplace operation according to claim 2, wherein a specific implementation mode of S6 is as follows:
S6-1: according to the formula,

Y1=A⊕B={x|B(x)∩A≠∅}

expanding the black-and-white image to merge the plurality of targets so as to obtain the expanded image Y1, wherein B represents a convolution mask image, A represents an original image, and x represents an element point in the original image; moving the image B along the element point x, thus yielding a set of obtained points, wherein the set of the obtained points is marked as B(x); B(x) represents a mobile structural element in the image A; ⊕ represents an expansion operation; and ∅ represents a null set;
S6-2: according to the formula,

Y2=Y1!B={y|B(y)∈Y1}

eroding the expanded image to recover the original dimension of the target, so as to obtain an eroded image Y2, wherein ! represents erosion operation, and y represents the element point in the expanded image; and translating the image B according to the element point y, wherein a set of the obtained points is marked as B(y); and
S6-3: repeating S6-1 to S6-2 on the black-and-white image for 30 times and identifying the contour of the expanded and eroded image to obtain a merged target contour.