The design and analysis of spatial data structures
The design and analysis of spatial data structures
Computer graphics: principles and practice (2nd ed.)
Computer graphics: principles and practice (2nd ed.)
The JPEG still picture compression standard
Communications of the ACM - Special issue on digital multimedia systems
S+-trees: an efficient structure for the representation of large pictures
CVGIP: Image Understanding
An effective way to represent quadtrees
Communications of the ACM
Variant code transformations for linear quadtrees
Pattern Recognition Letters
Image Content-Based Retrieval Using Chromaticity Moments
IEEE Transactions on Knowledge and Data Engineering
A reconfigurable logic-based processor for the SCAN image and video encryption algorithm
International Journal of Parallel Programming - Special issue: Workshop on application specific processors (WASP)
Image Processing, Analysis, and Machine Vision
Image Processing, Analysis, and Machine Vision
Set operations on constant bit-length linear quadtrees
Pattern Recognition
On a Method of Binary-Picture Representation and Its Application to Data Compression
IEEE Transactions on Pattern Analysis and Machine Intelligence
Real-time computation of two-dimensional moments on binary images using image block representation
IEEE Transactions on Image Processing
A moment-based approach for deskewing rotationally symmetric shapes
IEEE Transactions on Image Processing
A new approach to image retrieval with hierarchical color clustering
IEEE Transactions on Circuits and Systems for Video Technology
IEEE Transactions on Circuits and Systems for Video Technology
Information Sciences: an International Journal
Novel fractal image encoding algorithm using normalized one-norm and kick-out condition
Image and Vision Computing
SSDBM'10 Proceedings of the 22nd international conference on Scientific and statistical database management
A fast algorithm for computing moments of gray images based on NAM and extended shading approach
Frontiers of Computer Science in China
A chaos-based joint image compression and encryption scheme using DCT and SHA-1
Applied Soft Computing
A novel gray image representation using overlapping rectangular NAM and extended shading approach
Journal of Visual Communication and Image Representation
Hybrid fractal image coding with quadtree-based progressive structure
Journal of Visual Communication and Image Representation
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In this paper, a novel hybrid gray image representation using spatial- and DCT-based approach is presented. In the first phase, according to the bintree decomposition principle under the specified error, an S-tree spatial data structure (SDS) is used to represent the decomposed bintree of the input gray image. In the constructed S-tree SDS, the leaves are partitioned into two types, namely the homogeneous leaves and the nonhomogeneous leaves. The homogeneous leaf is used to represent one rectangular or square homogeneous subimage with smooth, i.e., low frequency, content and the nonhomogeneous leaf is used to represent one nonhomogeneous subimage with nonsmooth, i.e., high frequency, content. In the second phase, each nonhomogeneous leaf is encoded by the DCT-based coding scheme for reducing the memory requirement. Based on some real gray images, experimental results show that our proposed gray image representation over the previously published S-tree- and shading-based SDS has about 63.08% memory-saving improvement ratio in average. Finally, we investigate the computational benefit when computing moments on our proposed gray image representation directly.