- PHOTOSHOP GRAYSCALE MODE FULL
- PHOTOSHOP GRAYSCALE MODE SOFTWARE
- PHOTOSHOP GRAYSCALE MODE PROFESSIONAL
PHOTOSHOP GRAYSCALE MODE FULL
Weighting of colors can be addressed with this technique, it emulates the capability of full Photoshop’s "Channel Mixing". I think you will get much better results with the following method, compliments of Scott Kelby.
Just seems a little silly to me, that’s all.Īnyone have any insight? In what situation would straight non-weighted averaging be a useful way to convert from color to black and white? I have to figure there are people out there using the feature…why do they consider it useful? I can always export layers I want to be black & white to a new image, change the mode, and bring them back in to my original piece. However, since the mode conversion *does* do the right thing, I suppose it’s not that big of a deal.
PHOTOSHOP GRAYSCALE MODE PROFESSIONAL
I find it bizarre that a photo editing program with a pedigree firmly based in serious, professional graphic artistry would include such an amateurish color-to-black-and-white conversion feature (it’s the algorithm a freshman computer science major would use, before he learns about human visual perception). Thus, each rectangle winds up as a 33% gray (since each started out with one color at 100% and the others at 0%). As near as I can tell, the red, green, and blue values are averaged, but without any weighting. Using the Remove Color command resulted in all of the rectangles being the same shade of gray. This is consistent with normal conversion practices. I then used each method to remove the color.Ĭhanging the color mode gave me the expected results: the rectangles all came out different shades of gray, with the green being the lightest, and the blue being the darkest. 🙂Īnyway, my experiment involved drawing three solid rectangles, each one pure red, green, and blue respectively. While it’s true that there’s even more depth to the complexity when a printer is introduced, I don’t necessarily want to have to print out an image to get the image I want. See the remainder of this message for what I found out about "the way it is"…įirst, just to clarify: my question concerns strictly the on-screen, image editing behavior.
PHOTOSHOP GRAYSCALE MODE SOFTWARE
So, that’s my remaining question: why is the software designed the way it is? I’ve pretty much answered my own question for myself, but I’m still unclear as to WHY the software does what it does. I’ve done a little experimenting and have some additional information. The documentation doesn’t explain exactly what converting to grayscale mode does (that is, what the underlying algorithm is), but I would have thought that at the least, removing all the saturation using the Remove Color command and removing all the saturation in the color chooser dialog would do the same thing. So, can anyone shed some light on these differences? Why do the Remove Color command, converting to grayscale mode, and manually changing the color by reducing the saturation to 0% all produce difference results? Oddly enough, when I use the eyedropper tool to pick up the green, and then edit the color in the color chooser, dropping the saturation to 0% and leaving everything else unchanged, I get yet a third shade of gray, even lighter than what converting the image to grayscale mode does.
I’m basing that on my recollection of the weighting that is normally done when converting RGB to grayscale, in which the green is given the highest weight, and the blue the lowest, because physiologically, the green is perceived as a "brighter" color. I suspect that converting to grayscale mode is the more accurate, because the image had a fair amount of green in it, and converting to grayscale mode resulted in the lighter image. When I tried both, the images were noticeably different. This topic - davidkchan "what is the best way to convert a color photo to black and white" 7/24/03 9:59pm - says that converting the image mode to grayscale is the same as using the Remove Color command from the Enhance menu.īut it’s not. I’m trying to figure out what the most accurate way to convert a color image to a grayscale is.
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