From RGB to L*a*b* color space (2024)
5 days ago
- #Lab color space
- #color accuracy
- #sRGB conversion
- RGB color space is not perceptually uniform, leading to inaccuracies in color reproduction.
- Lab color space is perceptually uniform, separating lightness (L*) from color information (a* and b*).
- Delta E (��E) is used to measure color differences in Lab space for accurate color assessment.
- Lab components: L* (lightness, 0-100), a* (green-red axis), b* (blue-yellow axis).
- Conversion from sRGB to Lab involves normalization, gamma correction, and transformations to XYZ and Lab.
- Key steps: normalize RGB, apply gamma correction, convert to XYZ, then to Lab using formulas.
- White point selection (e.g., D65, D50) is crucial for accurate color representation in Lab space.
- Common white points: D65 (daylight, sRGB), D50 (printing), E (equal energy).
- Python's scikit-image library simplifies sRGB to Lab conversion with `rgb2lab` function.