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Using H.264/AVC-intra for DCT Based Segmentation Driven Compound Image Compression


Affiliations
1 Department of Computer Science and Engineering, Manomaniam Sundaranar University, Tamil Nadu, India
     

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This paper presents a one pass block classification algorithm for efficient coding of compound images which consists of multimedia elements like text, graphics and natural images. The objective is to minimize the loss of visual quality of text during compression by separating text information which needs high special resolution than the pictures and background. It segments computer screen images into text/graphics and picture/background classes based on DCT energy in each 4x4 block, and then compresses both text/graphics pixels and picture/background blocks by H.264/AVC with variable quantization parameter. Experimental results show that the single H.264/AVC-INTRA coder with variable quantization outperforms single coders such as JPEG, JPEG-2000 for compound images. Also the proposed method improves the PSNR value significantly than standard JPEG, JPEG-2000 and while keeping competitive compression ratios.

Keywords

Compound Image Compression, Block Classification, DCT Coefficients, H.264/AVC-Intra
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  • Using H.264/AVC-intra for DCT Based Segmentation Driven Compound Image Compression

Abstract Views: 247  |  PDF Views: 0

Authors

S. Ebenezer Juliet
Department of Computer Science and Engineering, Manomaniam Sundaranar University, Tamil Nadu, India
V. Sadasivam
Department of Computer Science and Engineering, Manomaniam Sundaranar University, Tamil Nadu, India
D. Jemi Florinabel
Department of Computer Science and Engineering, Manomaniam Sundaranar University, Tamil Nadu, India

Abstract


This paper presents a one pass block classification algorithm for efficient coding of compound images which consists of multimedia elements like text, graphics and natural images. The objective is to minimize the loss of visual quality of text during compression by separating text information which needs high special resolution than the pictures and background. It segments computer screen images into text/graphics and picture/background classes based on DCT energy in each 4x4 block, and then compresses both text/graphics pixels and picture/background blocks by H.264/AVC with variable quantization parameter. Experimental results show that the single H.264/AVC-INTRA coder with variable quantization outperforms single coders such as JPEG, JPEG-2000 for compound images. Also the proposed method improves the PSNR value significantly than standard JPEG, JPEG-2000 and while keeping competitive compression ratios.

Keywords


Compound Image Compression, Block Classification, DCT Coefficients, H.264/AVC-Intra