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标题:PHP通过哈希算法来实现搜索相似图片
正文:
感知哈希算法count < =5 匹配最相似count > 10 两张不同的图片var_dump(ImageHash::run(‘./1.png', ‘./camnpr.jpg'));<?phpclass ImageHash { const FILE_NOT_FOUND = '-1'; const FILE_EXTNAME_ILLEGAL = '-2'; private function __construct() {} public static function run($src1, $src2) { static $self; if(!$self) $self = new static; if(!is_file($src1) || !is_file($src2)) exit(self::FILE_NOT_FOUND); $hash1 = $self->getHashValue($src1); $hash2 = $self->getHashValue($src2); if(strlen($hash1) !== strlen($hash2)) return false; $count = 0; $len = strlen($hash1); for($i = 0; $i < $len; $i++) if($hash1[$i] !== $hash2[$i]) $count++; return $count <= 10 ? true : false; } public function getImage($file) { $extname = pathinfo($file, PATHINFO_EXTENSION); if(!in_array($extname, ['jpg','jpeg','png','gif'])) exit(self::FILE_EXTNAME_ILLEGAL); $img = call_user_func('imagecreatefrom'. ( $extname == 'jpg' ? 'jpeg' : $extname ) , $file); return $img; } publi
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