Start with a grayscale image and choose Image > Mode > Bitmap..., then from the Method dropdown choose Halftone Screen and in the next dialog you can set a screen frequency, dot shape, etc.
The bitmap image can be placed in ID, and you can apply a color to the image and a different color as the fill for the image frame if you like
In addition to Peter's suggestion, the halftoned bitmap is line art so it needs more resolution to accurately draw the dots. So:
If you add color ideally it should be 100% value combinations so you don't have a printer screen interfering. Above is 100% magenta back with 100%cyan+100%magenta for the halftone line art
Or, you could try saving your Photoshop file as PDF and placing that into Indesign.
Oh! Many thanks to all the three of you! I will try all of that and come back to let you know.
Of course i was wasting time not thinkingo the easy one. It totally worked .
The other solution solves the problem perfectly, too, but it takes longer and i like the look of the halftone effect better that the bitmap look (they are very crappy pictures to start from, but i have to use those).
rob day, Peter Spier
Thank you very much to all!
It totally worked .
PDF vs PSD wouldn't have any effect on output—in both cases your filtered halftone is the same image