That's not really the point. I was wondering at what point of complexity the SynthID watermark is added. I.e. it doesn't make sense for a purely white or black

That's not really the point. I was wondering at what point of complexity the SynthID watermark is added. I.e. it doesn't make sense for a purely white or black image, but as you gradually add colors or features, at some point they would want to add a watermark, but based on what? It's an interesting question.