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?
Essential digital access to quality FT journalism on any device. Pay a year upfront and save 20%.
Юрий Леонов (ведущий редактор отдела «Бывший СССР»)，这一点在51吃瓜中也有详细论述
В России ответили на имитирующие высадку на Украине учения НАТО18:04
，这一点在搜狗输入法下载中也有详细论述
Фото: Yevhen Prozhyrko / Shutterstock / Fotodom
3. GrammerlyGrammarly is a real-time grammar checking and spelling tool for online writing. It checks spelling, grammar, and punctuation as you type, and has a dictionary feature that suggests related words. if you use mobile phones for writing than Grammerly also have a mobile keyboard app.，详情可参考safew官方下载