OpenAI reaches deal to deploy AI models on U.S. Department of War classified network
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Google 自己也十分清楚这一点，所以他们也一并升级了防伪技术。Nano Banana 2 继续加深了对 SynthID 数字水印和 C2PA 内容凭证的支持，能够更清楚地看到一张图到底是不是 AI 画的，以及它是怎么被修改的。
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?