منابع مشابه
Improved image decompression for reduced transform coding artifacts
-The perceived quality of images reconstructed from low bit rate compression is severely degraded by the appearance of transform coding artifacts. This paper proposes a method for producing higher quality reconstructed images based on a stochastic model for the image data. Quantization (scalar or vector) partitions the transform coefficient space and maps all points in a partition cell to a rep...
متن کاملReduction of Block - Transform Image Coding Artifacts
This letter presents a new approach to reduce coding artifacts in transform image coding. We approach the problem in an estimation of each transform coeecient from its quantized version with its local mean and variance. The proposed method can reduce much coding artifacts of low bit-rate coded images, and at the same time guarantee that the resulting images satisses the quantization error const...
متن کاملReduction of Coding Artifacts in Transform Image Coding by Using Local Statistics of Transform Coefficients
This paper proposes a new approach to reduce coding artifacts in transform image coding. We approach the problem in an estimation of each transform coe cient from the quantized data by using its local mean and variance. The proposed method can reduce much coding artifacts of low bit-rate coded images, and at the same time guarantee that the resulting images satis es the quantization error const...
متن کاملLapped biorthogonal transforms for transform coding with reduced blocking and ringing artifacts
Two new lapped transforms are introduced: the LBT (lapped biorthogonal transform) and the HLBT (hierarchical lapped biorthogonal transform). The LBT has the same computational complexity of the LOT (lapped orthogonal transform), with much less blocking artifacts. The HLBT has a significantly lower computational complexity than the LOT, essentially no blocking artifacts, and less ringing artifac...
متن کاملBiorthogonal and nonuniform lapped transforms for transform coding with reduced blocking and ringing artifacts
New lapped transforms are introduced. The LBT (lapped biorthogonal transform), and HLBT (hierarchical lapped biorthogonal transform) are appropriate for image coding, and the MLBT (modulated lapped biorthogonal transform) and NMLBT (nonuniform modulated lapped biorthogonal transform) are appropriate for audio coding. The HLBT has a significantly lower computational complexity than the LOT (lapp...
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ژورنال
عنوان ژورنال: IEEE Transactions on Circuits and Systems for Video Technology
سال: 1995
ISSN: 1051-8215
DOI: 10.1109/76.475891