Статья. - Опубликована в сборнике IARIGAI, 2008. - №35 - 347-353 c.
- Текст англ. Method of objective evaluation the fine Adobe Acrobat
документ
For objective quantitative measurement of the image fine detail
distortion involved by screening the Screening
Distortion Factor (SDF) is proposed. It comprises the norm of an error evaluated by superimposing of the original
and halftoned resolution patte bitmaps and counting the normalized sum of microdots, which changed their
polarity (from black to white and from white to black) as result of screening. The losses in an image high spatial
frequency component are illustrated by plotting the SDF curves via line test patte frequency for variety of such
screening process parameters as screen ruling, screening factor, screen and dot geometry, screening algorithm, etc.
Distortion Factor (SDF) is proposed. It comprises the norm of an error evaluated by superimposing of the original
and halftoned resolution patte bitmaps and counting the normalized sum of microdots, which changed their
polarity (from black to white and from white to black) as result of screening. The losses in an image high spatial
frequency component are illustrated by plotting the SDF curves via line test patte frequency for variety of such
screening process parameters as screen ruling, screening factor, screen and dot geometry, screening algorithm, etc.