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Adaptive Bit Plane Quadtree-based Block Truncation Coding for Image Compression

机译:基于自适应位平面四叉树的块截断编码

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Block truncation coding (BTC) is a fast image compression technique applied in spatial domain. Traditional BTC and its variants mainly focus on reducing computational complexity for low bit rate compression, at the cost of lower quality of decoded images, especially for images with rich texture. To solve this problem, in this paper, a quadtree-based block truncation coding algorithm combined with adaptive bit plane transmission is proposed. First, the direction of edge in each block is detected using Sobel operator. For the block with minimal size, adaptive bit plane is utilized to optimize the BTC, which depends on its MSE loss encoded by absolute moment block truncation coding (AMBTC). Extensive experimental results show that our method gains 0.85 dB PSNR on average compare to some other state-of-the-art BTC variants. So it is desirable for real time image compression applications.
机译:块截断编码(BTC)是一种应用于空间域的快速图像压缩技术。传统的BTC及其变体主要集中于降低低比特率压缩的计算复杂度,但以降低解码图像的质量为代价,尤其是对于具有丰富纹理的图像。为了解决这个问题,本文提出了一种结合自适应位平面传输的基于四叉树的块截断编码算法。首先,使用Sobel算子检测每个块中边缘的方向。对于具有最小尺寸的块,利用自适应位平面来优化BTC,这取决于通过绝对矩块截断编码(AMBTC)编码的BSE MSE损失。大量的实验结果表明,与其他一些最新的BTC变体相比,我们的方法平均获得0.85 dB的PSNR。因此,对于实时图像压缩应用是合乎需要的。

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