A lesser known fact for artists is that tinting is acually a convolution operation between the light source and the image color (not spatial ) frequency spectra.
He passes up differences between absortion spectra ( pigment or substractive color model ) and emition spectra ( light or additive color model ). Although it's not hard to understand , an electron jumps to a very specific energy level on absortion , but goes down through all intermidiate energy levels on emition , making light percivied from light emitiong sources ( i.e. a TV screen ) "richier" than light percieved from light absorbing sources ( i.e. a printed image ).
Here’s another interesting bit of info to consider when thinking about the colors of light: Even though EM energy is made of waves, and we can combine different colored light, A+B, to make a third color, C, the EM waves do not interfere w each other (like sound-waves, or liquid-waves), A+B (does not =) C (a new wavelength energy); A+B = (A+B) a combination of the two wavelengths (not an admixture or interference), and C is ‘percieved’ by our visual-sensors/brain/thing. But w pigments, we are creating a new chemistry: A+B = C, where C has the property of reflecting the wavelength = C. Thanks for the link, James! -RQ
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ReplyDeleteThat was great fun!
ReplyDeleteA lesser known fact for artists is that tinting is acually a convolution operation between the light source and the image color (not spatial ) frequency spectra.
ReplyDeleteHe passes up differences between absortion spectra ( pigment or substractive color model ) and emition spectra ( light or additive color model ). Although it's not hard to understand , an electron jumps to a very specific energy level on absortion , but goes down through all intermidiate energy levels on emition , making light percivied from light emitiong sources ( i.e. a TV screen ) "richier" than light percieved from light absorbing sources ( i.e. a printed image ).
ReplyDeleteHere’s another interesting bit of info to consider when thinking about the colors of light: Even though EM energy is made of waves, and we can combine different colored light, A+B, to make a third color, C, the EM waves do not interfere w each other (like sound-waves, or liquid-waves), A+B (does not =) C (a new wavelength energy); A+B = (A+B) a combination of the two wavelengths (not an admixture or interference), and C is ‘percieved’ by our visual-sensors/brain/thing. But w pigments, we are creating a new chemistry: A+B = C, where C has the property of reflecting the wavelength = C.
ReplyDeleteThanks for the link, James! -RQ