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On NTSC Video, Blue Blurring, Chroma Subsampling
NEOGEOman writes "Something I've been fascinated with for a long time is video signals. On my website I've spent over six years collecting video and other hacks for game consoles. I've recently put together the fourth revision of my video signal primer and it's expanded to six pages now, including strange subjects like chroma subsampling, horizontal colour resolution and rather interesting revelation: your eyes suck at blue."
Alright, I'll tell you exactly that. I used a digital camera, and reduced the image to 25% using an interpolated scaling to create an image much closer to 'balanced' than a raw digital image would be. By scaling it this way the image was resampled to the new size by combining and averaging the pixels, negating any effect the camera's CCD had.
According to the histogram the colours are very nearly the same but for some variation in the highs.
What you say is irrelevant for the discussion, really, because a digital camera also uses JPG compression which, as we've discussed, creates a high-res green and low-res red + blue image. That's the other reason I resampled it, it negates the JPG effects and creates a (very lovely) new image without effects from the CCD or JPG compression.
Does that satisfy you?