SSIM (Structural Similarity Index Measure) compares two images by evaluating luminance, contrast, and structural patterns across local windows. It returns a score from -1 to 1: 1.0 means the images are pixel-identical, 0 means no structural correlation, and negative values mean the images are anti-correlated (less alike than random noise). For glyph comparison, it answers the question: do these two rendered characters share the same visual structure?
→ 0x5D5 (PASSED) + set A-bit
，详情可参考下载安装 谷歌浏览器 开启极速安全的 上网之旅。
（二）未取得驾驶证驾驶或者偷开他人航空器、机动船舶的。。爱思助手下载最新版本是该领域的重要参考
（作者单位：北京大学考古文博学院）