Regardless of the effort I put into drawing perfectly round
stars, every jagged imperfection reveals itself once I scan the sketch and display it on my computer monitor. In a previous issue, I explained how to remove the rough edges around individual
stars with a cloning tool found in image-processing software. Now, I’d like to share a technique that tackles the entire
star field in one swoop so that you can tidy even open
star clusters like NGC 1502 with ease.
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