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Foreground/background bit allocation for region-of-interest coding

Conference Paper


Abstract


  • Two bit allocation strategies, namely, Maximum Bit Transfer (MBT) and Joint Bit Assignment (JBA) are proposed for region-of-interest coding. The MBT strategy uses a pair of quantizers to facilitate maximum bit transfer from background to foreground image region. It assigns the highest quantization parameter to the background quantizer, and then determines the finest value of foreground quantizer that can be used without increasing the bit rate. In this approach, the background is always encoded with the coarsest quantization level, but this is not always desirable. Therefore, the JBA strategy can be used instead. It has two modes: user-defined and automatic. In the user-defined mode, the user can adjust bit consumption using a scale that ranges from "not coding foreground" to "coding foreground only". In the automatic mode, bit allocation is based on the characteristics of the image regions, which include size, motion and priority. The coding results showed that improved image quality was achieved at the same bit rate.

Publication Date


  • 2000

Citation


  • Chai, D., Ngan, K. N., & Bouzerdoum, A. (2000). Foreground/background bit allocation for region-of-interest coding. In IEEE International Conference on Image Processing Vol. 2 (pp. 923-926). doi:10.1109/icip.2000.899867

Scopus Eid


  • 2-s2.0-0034441232

Start Page


  • 923

End Page


  • 926

Volume


  • 2

Issue


Place Of Publication


Abstract


  • Two bit allocation strategies, namely, Maximum Bit Transfer (MBT) and Joint Bit Assignment (JBA) are proposed for region-of-interest coding. The MBT strategy uses a pair of quantizers to facilitate maximum bit transfer from background to foreground image region. It assigns the highest quantization parameter to the background quantizer, and then determines the finest value of foreground quantizer that can be used without increasing the bit rate. In this approach, the background is always encoded with the coarsest quantization level, but this is not always desirable. Therefore, the JBA strategy can be used instead. It has two modes: user-defined and automatic. In the user-defined mode, the user can adjust bit consumption using a scale that ranges from "not coding foreground" to "coding foreground only". In the automatic mode, bit allocation is based on the characteristics of the image regions, which include size, motion and priority. The coding results showed that improved image quality was achieved at the same bit rate.

Publication Date


  • 2000

Citation


  • Chai, D., Ngan, K. N., & Bouzerdoum, A. (2000). Foreground/background bit allocation for region-of-interest coding. In IEEE International Conference on Image Processing Vol. 2 (pp. 923-926). doi:10.1109/icip.2000.899867

Scopus Eid


  • 2-s2.0-0034441232

Start Page


  • 923

End Page


  • 926

Volume


  • 2

Issue


Place Of Publication