Emission spectrum reconstruction method based on full-color fluorescent printing product

The invention discloses an emission spectrum reconstruction method based on a full-color fluorescent printing product. The method comprises the steps that color samples are prepared, the color samplesrelate to red, green and blue with different dot coverage rates of 0%, 25% and 75%-100% and 336 yellow, magenta, cyan and the like formed by mutual superposition of the red, green and blue, and different printing materials and different screening modes are selected for treatment; the emission spectrum intensity of the color sample under different exciting light powers is measured; a covariance matrix E is calculated; the eigenvalues and eigenvectors of the covariance matrix are calculated, and the eigenvalues are arranged from large to small; the first m principal components and a corresponding principal component sample matrix Z are determined; a composition coefficient U and a conversion matrix C of the principal component are calculated; and an emission spectrum curve is reconstructedaccording to the respectiv