Design of DTCWT-DWT Image Compressor-Decompressor with Companding Algorithm
Journal Title: Advances in Image and Video Processing - Year 2017, Vol 5, Issue 1
Abstract
Discrete Wavelet Transform (DWT) has demonstrated advantages in image compression due to its time-frequency resolution property. Dual Tree Complex Wavelet Transform (DTCWT) in addition to the advantages of DWT supports additional properties such as directionality and shift invariant. DTCWT has coefficient redundancy of 4:1 or 2m:1 in m dimensions thus is four time complex than DWT computation. In this work, DTCWT based image compression algorithm is proposed that performs decomposition using DTCWT and reconstruction is carried out using DWT. The DTCWT bands are companded and encoded using entropy encoder and the quantization of the sub bands introduces minimum loss. The proposed algorithm achieves 77% compression with 40 dB PSNR thus suitable for real time image compression. DTCWT filters are appropriately selected to achieve perfect reconstruction.
Authors and Affiliations
Venkateshappa . , Cyril Prasanna Raj P
Keywords
Related Articles
- EP ID EP303235
- DOI 10.14738/aivp.51.2777
- Views 61
- Downloads 0
Investigating the Properties of the Vertisols at Kenana III and IV Towards Enhancing Management Practices (Sennar State - Sudan)
A series of studies were initiated in Sudan in the early 1950s for utilization of the Nile Waters [19]. On the basis of these studies the Rosaries Dam was built on the Blue Nile. By the end of 2008 a programme to start t...
MR Image Segmentation Based on Contrast Enhancement with Collaborative Learning
Magnetic resonance imaging (MRI) has been widely used on clinical applications. Due to different weighting strategies MRI, different weighting images have different contrast even for the same anatomy structure of the sam...
Pedological Characterization of the Soils of Atbara and Gash Rivers Upper Atbara Project Area (Kassala State - Sudan)
The soil study area is composed of wide and nearly flat alluvium plain deposits laid by Atbara and Gash Rivers. The study area makes about 751,290 ha and lies within arid and semi-desert climate zones and experiences rai...
People Detection in Complex Scenes By Using An Improved and Robust HOG Descriptor
The detection of moving people in a complex scene filmed with a single camera is among the most difficult fields of research in vision by computer. In this work, we suggest improving the quality of detection methods base...
Participatory Management of Muscles Strengthening of Core Stability and Lower Extremity to Reduce of Premenstrual Syndrome
Competence to reduce of premenstrual syndrome must be have each student, so physically and psychologically able to do activities Tridharma Colleges well. One of the efforts that can reduce of premenstrual syndrome is doi...