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In terms of the DNG 1.2 specification, what makes the new camera profiles technically different from the old ones?

April 26, 2017camera different dng Profiles specification Technically terms

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In terms of the DNG 1.2 specification, what makes the new camera profiles technically different from the old ones?

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Our earlier camera profiles (in CR 4.4.1 / LR 1.4.1 and earlier) only use color matrices to perform the colorimetric characterization of digital image sensors. One set of matrices is optimized for standard illuminant A (~2850 K) and another set of matrices is optimized for illuminant D65 (~6500 K). CR / LR automatically interpolate between these two sets of matrices based on an image’s white balance. The DNG 1.2 specification expands and formalizes the concept of a camera profile. In addition to color matrices, profiles may now contain a set of color lookup tables and an optional tone curve. The new AS and CM profiles are using these additional features to improve color rendering in CR 4.5 / LR 2.0. The DNG 1.2 specification also includes other features, such as raw image digest support, that are unrelated to color rendering.