iVenky
Advanced Member level 2
- Joined
- Jul 11, 2011
- Messages
- 584
- Helped
- 37
- Reputation
- 76
- Reaction score
- 35
- Trophy points
- 1,318
- Location
- College Station, Texas
- Activity points
- 6,124
Moire pattern in the newspapers and also "halftone dots" and "sampling grids"
I know about the moire patterns but I couldn't quite understand about the Moire patterns that we see in the newspapers. I saw this picture
I don't quite understand the moire patterns in this picture. The book says "The moire pattern in this image is the interference between the 45 degree orientation of the halftone dots and the north-south orientation of the sampling grid used to digitize the image". I am quite confused with this sentence. In addition I don't quite understand about the "halftone dots" and "sampling girds". Especially-----
What are "Sampling grids"?
---------- Post added at 17:53 ---------- Previous post was at 17:44 ----------
I got it guys. I misunderstood. This is the scanned image of the newspaper right? I thought this was the image in the newspaper. Anyway, now I understood everything.
I know about the moire patterns but I couldn't quite understand about the Moire patterns that we see in the newspapers. I saw this picture
I don't quite understand the moire patterns in this picture. The book says "The moire pattern in this image is the interference between the 45 degree orientation of the halftone dots and the north-south orientation of the sampling grid used to digitize the image". I am quite confused with this sentence. In addition I don't quite understand about the "halftone dots" and "sampling girds". Especially-----
What are "Sampling grids"?
---------- Post added at 17:53 ---------- Previous post was at 17:44 ----------
I got it guys. I misunderstood. This is the scanned image of the newspaper right? I thought this was the image in the newspaper. Anyway, now I understood everything.