I am a dental student. As part of my project I need to convert the RBG values obtained from Adobe Photoshop into CIELAB values in order to compare with values obtained with a spectrophotometer?
Performing this conversion accurately requires knowledge of the specific RGB specification used. You can get a reasonable conversion in Adobe Photoshop itself (which will depend on the color settings of Photoshop to define the exact transform). Simply take an image in with the RGB values and change mode to LAB. (Under Image->Mode->Lab color.) That will give you CIELAB coordinates. You can also find both sets of coordinates in the Photoshop color picker. Just type in the RGB values and you will see equivalent LAB values for the current color settings.
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