问题描述
我有一个EPS文件，其中包含c，m，y和k 4个通道.我尝试使用Ghostscript ps命令将其分离为4个1bit的tiff图像.
I have an EPS file that contains c, m, y and k 4 channels.I try to use Ghostscript ps command to separate it to 4 1bit tiff images.
我对gs命令中的筛选功能一无所知.
I don't have any idea about screening function in gs command .
有人知道如何在gs命令中调整筛选吗?
如何为每种分色设置1位TIFF的频率(lpi)和角度?
Does anyone known how to adjust screening in gs command?
How to set 1 bit tiff's frequency(lpi) and angle for each separation color?
推荐答案
我认为您的意思是您拥有EPS文件，而不是ESP文件.如果是这样，则EPS程序不应包含任何半色调信息.
I presume you mean you have an EPS file, not an ESP file. If so then the EPS program should not contain any halftoning information.
您可以使用-c"..." -f序列将PostScript直接发送到Ghostscript，或在您的EPS文件之前将PostScript写入要处理的文件中.
You can use the -c "..." -f sequence to send PostScript directly to Ghostscript, or write PostScript into a file to be processed before your EPS file.
您会发现在《 PostScript语言参考手册》第494页的第7.4节之后，对半色调网屏进行了相当广泛的介绍.您可以使用旧的setscreen(仅一个半色调网屏)，setcolorscreen(每个平面一个半色调，Gray，CMYK或RGB)或sethalftone，以提供更大的灵活性.
You will find that halftone screening is covered in considerable depth in the PostScript Language Reference Manual, Section 7.4 on page 494 onwards. You can use the old setscreen (one halftone screen only), setcolorscreen (one halftone per plane, Gray, CMYK or RGB) or sethalftone which allows considerably more flexibility.
另请参见此处
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