In the proposed method, the P-box is chosen as the same size of plain-image, which shuffles the positions of pixels totally.
Also we need to name the neighbourhood radius vector which define the positions of pixels that belong to the neighbourhood relative to any current pixel.
The corresponding positions of pixels a, b, c, d, e, f, g, and h are on the upper left, top, upper right, left, right, lower left, bottom, lower right of the pixel y, respectively.
The positions of integer pixels, half pixels, and quarter pixels in a PU.
It analyzes the color and position of pixels in frames adjacent to ones with the poor images, said Sean Varah, the company's chief executive, then adds information found in those nearby frames to make improvements.
Since, in [19] pixel level fusion was considered, that should not work for the images with a subtle change in position of pixels due to expression, shift, tilt, or even noise.
That is, to send an image, each message have the information of the source, plus the position of pixel (x and y) and the corresponding pixel data.
Therefore, m(n, p) and s(n, p) are independent of the position of pixel p. Then, a histogram can be derived from the difference between {I(n+1, p)} and {G(n, p)} in a triangular region.
Equation (5) gives the distance of the pixel to the contour, where μ is a constant that indicates the distance coefficient s i g n(s i,Ω =1 when s i is inside Ω and s i g n(s i,Ω)=−1 when s i is outside Ω; and l o c(s) is the coordinate position of pixel s in the image.
where b i is the i th predicted block for the target frame, (x, y) represent the spatial position of pixel resolution, B x, y, t - 1) and B x, y, t + 1) are the key frames reconstructed using H.264/AVC intra-frame coding, t is a time index, w i is the flag bit to indicate whether a backward or a forward frame is used, and MV i is a motion vector that is received from the decoder.
The positions of the pixels [b 1,b 2,are 1,c 2] are illustrated in Figure9 as an example.
