喷墨打印相纸及打印图像质量的分析

The Discussion of Inkjet Photo Paper Technology,Quality and Image Fidelity

喷墨打印相纸随着数码相机的发展近几年在国内发展迅速。针对目前产品质量没有测量标准的现状,提出喷墨相纸的质量指标主要为4个,即白度、光泽度、油墨吸收性和防水性。给出了相应的测量方法。并指出相纸上油墨点的面积是衡量质量的第一重要指标,其次是点的圆度。另外对图像输出的质量介绍了一种科学的评价方法,即图像的逼真性分析。说明图像的打印墨点直径不应小于方形像素的对角线长,图像才能真实再现。

Inkjet photo paper has been quickly developed with the fast development of digital camera during these years in China. As for the fact of the lack of inkjet paper quality judgment given in Chinese inkjet photo paper market, it is suggested to use brightness, gloss, ink absorption and water fastness as the main quality index in order to provide better and more accurate information. Accordingly their scientific measurements were described. It shows that the dot area is the first important factor to inkjet photo paper image quality, the dot roundness is listed as the second factor. In addition, an advanced evaluation method of image fidelity is introduced. It is interpreted that ink dot diameter on inkjet photo paper is required to be no less than the length of the diagonal in order to make ink fully cover a pixel so that image could be faithfully reproduced.