Re: Re: convert image to greyscale (color to black and white)

Actually the eye is most sensitive to GREEN which is why all the night vision stuff is always green light. The best formula (according to the GIMP guys is the proportional luminescence one - see Re: convert image to greyscale (color to black and white)

cheers

tachyon

Comment on Re: Re: convert image to greyscale (color to black and white)

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Re^3: convert image to greyscale (color to black and white) by Razorbeard (Initiate) on Jan 05, 2009 at 17:40 UTC
May I suggest that the reason that green is used for night lighting isnt so much the eye sensitivity, tho that IS true. It has to do with persistance of vision. Green can be easily seen at night while preserving your night vision. Brighter colors like yellow kinda mess-up your night vision. Green is more "friendly" to your night vision. Some car instrument panels (speedometer, etc) are lit in yellow. While that is easier to see it is hard on your night vision. This may not be true for everybody, but it is generally true for most people.	[reply]

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Re^3: convert image to greyscale (color to black and white)
by Razorbeard (Initiate) on Jan 05, 2009 at 17:40 UTC

May I suggest that the reason that green is used for night lighting isnt so much the eye sensitivity, tho that IS true. It has to do with persistance of vision. Green can be easily seen at night while preserving your night vision. Brighter colors like yellow kinda mess-up your night vision. Green is more "friendly" to your night vision. Some car instrument panels (speedometer, etc) are lit in yellow. While that is easier to see it is hard on your night vision. This may not be true for everybody, but it is generally true for most people.

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