Quantitative Analysis Methods for Architectural Heritage’s Color Evaluation: Survey on Color Restoration and Perception of Wen Yuan Ge in the Forbidden City

The architectural heritage’s color evaluation has applied three methods: manual evaluation, instrumental measurement, and process restoration. Optical instruments can obtain relatively accurate chromaticity data from ideal surfaces. As the architectural heritage’s color has aged, the color data fluctuates. Researchers must screen the color data and analyze the featured ones with the color perception experience. This study combines the quantitative color analysis and scaled perception survey method to provide a new reference for the architectural heritage’s color research and design.