CompuServe Thread

#Convert to B&W

2 messages in this thread
#63962From: Sep 9, 1993 1:28 AM
Using ADPRO 2.3 how can I convert a gray scale image to Black and White? I want any color darker than a threshold to be converted to black and anything lighter than the same threshold converted to white. I'm sure that this is a simple operation, but I haven't been able to figure out a good way to do this.
#64040From: ASDGSep 10, 1993 12:02 AM
One way to do this with precise control, is to render the image with 256 shades of gray and then use the palette editor to copy black and white to the desired ranges. Using rendered to raw next will convert the gray data through the b&w color map into the state you want. Another less price method is to use combinations of the contrast brightness and gamme sliders (perhaps with an apply map inbetween). The intensity range operator can also be used along these lines.