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首页> 外文期刊>AEU: Archiv fur Elektronik und Ubertragungstechnik: Electronic and Communication >Adaptive low bit rate facial feature enhanced residual image coding method using SPIHT for compressing personal ID images
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Adaptive low bit rate facial feature enhanced residual image coding method using SPIHT for compressing personal ID images

机译:使用SPIHT的自适应低比特率面部特征增强残差图像编码方法压缩个人ID图像

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摘要

Personal identification (ID) image of a person is the main source of authentication in security systems. To retrieve an ID image quickly from the server, a very small sized image file is required. This is achieved by lossy compression of the image. In this paper we propose a method for compressing an ID image below 1 KB that gives good visual quality of the facial features. Discrete Wavelet Transform (DWT) based on CDF 9/7 wavelet filter is used to transform the image. The image is encoded with SPIHT coding at a given rate of bpp. Maxshift method is applied to the residual matrix for the facial features and encoded with SPIHT at another rate of bpp. Both the encoded bit streams are sent to the client. At the client side both the bit streams are decoded and applied with inverse wavelet transformation separately. The images are added to get the reconstructed image. Experimental results show that this method gives better visual quality of the face than that of SPIHT at bpp < 0.1.
机译:一个人的个人身份(ID)图像是安全系统中身份验证的主要来源。要从服务器快速检索ID图像,需要非常小的图像文件。这是通过图像的有损压缩来实现的。在本文中,我们提出了一种用于压缩ID图像的方法,该方法可压缩1 KB以下的ID图像,从而获得良好的面部特征视觉质量。基于CDF 9/7小波滤波器的离散小波变换(DWT)用于变换图像。图像以SPIHT编码以给定的bpp速率编码。将Maxshift方法应用于面部特征的残差矩阵,并以另一bpp速率用SPIHT进行编码。两个编码的比特流都发送到客户端。在客户端,两个比特流均被解码并分别通过逆小波变换应用。将图像相加以获得重构图像。实验结果表明,在bpp <0.1的情况下,该方法比SPIHT的面部视觉质量更好。

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