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首页> 外文会议>Computational Intelligence for Multimedia Signal and Vision Processing, 2009. CIMSVP '09 >Quality-aware selection of quality factor and scaling parameters in JPEG image transcoding
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Quality-aware selection of quality factor and scaling parameters in JPEG image transcoding

机译：JPEG图像转码中质量因子和缩放参数的质量感知选择

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摘要

Reducing the file size of a JPEG image to meet bandwidth or terminal constraints is a common transcoding operation. The reduction can be achieved by reducing either the quality factor (QF) or the resolution, or both. In this paper, we analyze the impact of QF and scaling parameter choices on the quality of the resulting images, as measured by a quality metric such as the structural similarity index (SSIM). We propose a quality-aware transcoding system which considers the quality of transcoded images when QF and scaling are selected jointly. Its goal is to select QF and scaling parameters that maximize the user experience under a given viewing condition, as measured by the chosen quality metric.
机译：减小JPEG图像的文件大小以满足带宽或终端限制是一种常见的转码操作。降低可以通过降低质量因数（QF）或分辨率或同时降低两者来实现。在本文中，我们通过质量度量（例如结构相似性指数（SSIM））来分析QF和缩放参数选择对最终图像质量的影响。我们提出了一种质量意识的转码系统，该系统在联合选择QF和缩放比例时会考虑转码后图像的质量。它的目标是选择QF和缩放参数，以在给定的观看条件下最大化用户体验，该质量由选定的质量指标衡量。

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