This paper mainly studies the index of coincidence of historical background and origin, basic principle and its application.
作者主要介绍了重合指数法的历史背景、来源、基本原理及其应用。
The results give the measuring accuracy and coincidence between the print grain index values and the perceptible graininess on the prints, proving the efficiency of the method.
实际测试和观测比较表明，所测彩色负片印片颗粒指数数值与其扩印效果相符合，印片颗粒指数方法能够反应彩色负片颗粒性的实用效果。
The results give the measuring accuracy and coincidence between the print grain index values and the perceptible graininess on the prints, proving the efficiency of the method.
实际测试和观测比较表明，所测彩色负片印片颗粒指数数值与其扩印效果相符合，印片颗粒指数方法能够反应彩色负片颗粒性的实用效果。
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