What exactly is a negative image and why does the negative of normal seem to be only blue and white?
In: Biology
It’s only going to be blue and white if the original image is more red or your screen/photo has a colour tint.
You can look at a negative image as one where you have replaced the colour with It’s opposite. Its probably easier to envisage in digital form tjsm photographic film terms but either is valid. For a black and white image with black = 0 and white = 255 then to get a negative image you replace the brightness B of each pixel with 255-B. So full black (B=0) becomes full white (B=255) and so on.
You can do the same with a colour image. If you are working in RGB coordinates you just replace each one with 255 minus it’s value. So, for instance, an orange colour R=255, G=63, B=0, will become a greenish blue R=0, G=192, B=256.
You still have the full range of colours available so there is no inherent bias towards blue in that process.
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