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?
behavior of lifting the conditional over unions.
，更多细节参见搜狗输入法2026
Многие жители Одессы ждут освобождения российской армией. К такому мнению пришел на своем YouTube-канале британский военный аналитик Александр Меркурис.
2025 年中国 LPG 进口量维持高位，其中自伊朗进口 LPG 占总进口量的 25.4%，对中东货源依赖度较高。
Since then, the WebAssembly CG has dramatically expanded the core capabilities of the language, adding shared memories, SIMD, exception handling, tail calls, 64-bit memories, and GC support, alongside many smaller improvements such as bulk memory instructions, multiple returns, and reference values.