除了压缩亮度的范 围，我们还必须考虑人类视觉系统(HVS)的特性，要能够保留图像的感观质量 (Perceptual Qualities)，即HVS 敏感的信息。
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结果表明：河南烟叶外观质量较好，物理特性和感观质量中等，化学成分尚欠协调；
The results indicated that Henan tobacco leaves had the characteristics of good appearance quality, medium physical and sensory property, and a little unbalanced chemical components.
感观质量要求：产品必须有符合本产品的典型的外观，气味，口味，没有任何难闻的气味。
Organoleptical Requirements: the product shall have a typical appearance, odor, flavor, texture without offensive odor and flavors.
但是，消费者的爱好却不同，因为他们明显更喜欢消费无脂、瘦肉型产品，而大理石纹肉在消费者眼里感观质量并不是那么好。
However, consumers preferences differ, since there is now a clear tendency to consume more and more fat-free products and, as a result, the sensory quality of these products by consumers may be lower.
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