This function coverts a picture (multi-tone image) to a monochrome image.
Monochrome images can only be painted
in the colours
black and white. You will find further information about this in the
introductory chapters.
Monochrome images often come from various drawing programs, for example.
When you convert a colour or greyscale image to a monochrome image, you lose the information about the colour and grey values, but for lower resolution output devices you will save memory and speed up screen drawing. You should do this conversion only when you are sure that you will never want to print the image to a higher resolution output device. (On the other hand, when you convert a monochrome image to a raster image, you can print it on higher resolution output devices because Calamus will generate the grey tones for that resolution.)
To convert a colour or greyscale image to a monochrome image, you
should first select a screen resolution that is the same as that of
the printer you will be using – so that each screen pixel
corresponds 1:1 to a printer pixel. Select a raster graphic frame
containing a colour or greyscale image and then click on the
Monochrome image
icon. After a safety query, Calamus will
generate a monochrome image with a raster that corresponds to the one
visible on the screen, and replace the original colour or grey image
with it.
