No word on whether this plug-in will remain free or will cost money when it’s finished. I haven’t tested this plug-in extensively, but it does appear to work quickly and all results end up on the black plate of color separations. Also, as the folks at Rorohiko are quick to point out, this plug-in offers no controls for how an image is converted (there are lots of ways to convert color images to grayscale see Real World Photoshop). The Color2Gray algorithm is a 3-step process: 1) convert RGB inputs to a perceptually uniform CIE L a b color space, 2) use chrominance and luminance di erences to create grayscale target di erences between nearby image pixels, and 3) solve an optimization problem designed to selectively modulate the grayscale representation. It appears to be magic.īut it’s not perfect magic: For example, transparency in an image apparently is not supported in this version, so pictures become opaque. How does this plug-in work? I know it’s based on an underlying hidden JavaScript, but I can’t tell what strings it’s pulling for the conversion. Many people have asked me about a feature like this in InDesign because QuarkXPress has an option to convert color images to grayscale at import time. The chrominance-luminance and the YUV conversions perform similar operations. Color2Gray: Sometimes, in converting a color image to grayscale (e.g.
#Color2gray equivalent install
Actually, more accurately, you have to install three plug-ins to make it work, but it’s easy to do (just download a file from their Web site and then drag the plug-ins into the Plug-ins folder inside your Adobe InDesign folder). When we convert a color image to grayscale using the color2gray function. this will create very noticeable seams, even if the backgrounds are similar. Rorohiko (“Lightning Brain”) recently released a free beta of an InDesign plug-in that converts color bitmapped images (such as TIFF, JPEG, and PSD) to grayscale.
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