Ai-Ping Yang

Learn More
Keywords: Biorthogonal transform Image compression JPEG algorithm All phase biorthogonal transform (APBT) Dual biorthogonal basis vectors Walsh transform (WT) Discrete cosine transform (DCT) Inverse discrete cosine transform (IDCT) Peak signal to noise ratio (PSNR) a b s t r a c t This paper proposes new concepts of the all phase biorthogonal transform(More)
BACKGROUND/AIMS To determine whether the combination of tumor markers (CA72-4, CA125, CA19-9 and CEA) could increase the sensitivity and accuracy for in the diagnosis of gastric cancer (GC). METHODS This study is a retrospective analysis. A total of 426 patients, including 106 patients with GC, 149 patients with benign gastric diseases and 171 healthy(More)
In order to reduce the memory requirements of the video applications, we present a lossy Bayer image compression pipeline performed better set-partitioning in hierarchical trees (SPIHT) coding as the core of the original data compression algorithm. The proposed method encodes and decodes images available in the CFA format. After finishing the image coding(More)
The JPEG standard is the most commonly employed lossy compression method for still continuous-tone images due to its high effectiveness and low computational complexity. However, the visually disturbing blocking artifacts generates when image is compressed at low bit rates. JPEG-based image coding algorithm has shown that employing down-sampling to a low(More)
In this paper shape adaptive all phase biorthogonal transform (SA-APBT) for coding arbitrarily shaped image segments is proposed. The proposed transform can be used in region-based image compression instead of the shape adaptive discrete cosine transform (SA-DCT). Region-based image coding method is made up of three procedures: image segmentation, contour(More)
In video compression, it can reduce the redundant information efficiently by motion estimation (ME) and motion compensation (MC), and less code is used to encode as much information as possible. In this paper, I frame encoding adopts wavelet transform and set partitioning in hierarchical trees (SPIHT) algorithm; for P frames, each frame sets the(More)
We introduce a new 2D graphic representation of DNA sequences considering codon degeneracy. Derived from the graphic representation, a multi-component vector is proposed to characterize quantitatively DNA sequences. Then we use the graphic representation and the vector to perform the phylogenetic analysis on two datasets, the complete coding sequences of(More)
A new method to improve DGM (1, 1) model based on time coefficient-amended is put forward. Firstly the equal interval with time coefficient is amended and the computing method is given. Secondly the improved DGM (1, 1) model is applied in some cases. The application results show that forecast precision of the improved DGM (1, 1) model has been improved(More)