公开(公告)号：US10296999B2

公开(公告)日：2019-05-21

申请号：US15431739

申请日：2017-02-13

Applicant: Macau University of Science and Technology

Inventor： Zhanchuan Cai

IPC: H04L9/00 ,  G06T1/00 ,  H04N19/467 ,  H04N1/32

Abstract: A method embeds a watermark image into a host image with adaptive rectangular partition and Lower Upper (LU) decomposition such that a watermarked image is generated with improved computational complexity. The method divides a host image into an Red (R) component, a Green (G) component, and a Blue (B) component, and divides each component of the R, G, and B components into a plurality of M×M size blocks, and partitions each of the plurality of M×M size blocks into a plurality of non-overlapping blocks with adaptive rectangular partition. The method selects a plurality of embedding blocks from the plurality of M×M size blocks for each component of the R, G, and B components of the host image to embed watermark information such that the watermarked image is generated.

公开(公告)号：US10037587B2

公开(公告)日：2018-07-31

申请号：US15360936

申请日：2016-11-23

Applicant: Macau University of Science and Technology

Inventor： Zhanchuan Cai

IPC: G06K9/00 ,  G06T1/00 ,  G06T7/40

CPC classification number: G06T7/90 ,  G06T1/0028 ,  G06T1/005 ,  G06T2201/0061

Abstract: One example embodiment is a method to embed a watermark image into a host image such that a watermarked image is generated. The method divides a host image into an Red (R) component, a Green (G) component, and a Blue (B) component, and partitions each component of the R, G, and B components into non-overlapping blocks from which embedding blocks are selected to embed watermark information such that a watermarked image is generated.

公开(公告)号：US09990334B2

公开(公告)日：2018-06-05

申请号：US15253903

申请日：2016-09-01

Applicant: Macau University of Science and Technology

Inventor： Zhanchuan Cai

IPC: G06F17/17 ,  G06T11/20 ,  G06T17/05

CPC classification number: G06F17/17 ,  G06T11/206 ,  G06T17/05 ,  G06T17/30

Abstract: A computer system executes hierarchical MK splines for scattered data approximation. The computer system constructs an image by generating a final approximation function that approximates a scattered data set with a hierarchy of control lattice from coarsest to densest. The method includes executing MK splines approximation to the scattered data set with the hierarchy of control lattice to iteratively obtain approximation functions. The image is constructed by generating the final approximation function to construct an interpolated surface.