哈希算法 pHash

     <p><img alt="哈希算法 pHash" src="https://simg.open-open.com/show/2d2babf1658885f575a878ca0df5df54.png" width="57" height="100" /></p>    <p>pHash是各种感知哈希算法的C++实现。感知哈希是一个多媒体指纹文件来自不同的特点，从它的内容。不同的加密散列函数对输入的微小变化，在雪 崩，导 致在输出急剧变动的影响，依赖，知觉哈希“接近”，如果彼此的特点是相似的。潜在应用包括版权保护的媒体文件，甚至数字取证，相似性搜索。</p>    <p>pHash is an implementation of various perceptual hashing algorithms. A perceptual hash is a fingerprint of a multimedia file derived from various features from its content. Unlike cryptographic hash functions that rely on the avalanche effect of small changes in input leading to drastic changes in the output, perceptual hashes are "close" to one another if the features are similar. Potential applications include copyright protection, similarity searches for media files, or even digital forensics.<br /> <br /> </p>    <p><strong>项目主页：</strong><a href="http://www.open-open.com/lib/view/home/1326886480874" target="_blank">http://www.open-open.com/lib/view/home/1326886480874</a></p>