Description of noise in digital zoneplate photographs. How to use photoshop to replace it with a simulated film grain.

After filtering the digital noise with photoshop you can use anti color fringing techniques to eliminate the residual chromatic noise.

Use photoshop to increase the sharpen only on detailed areas of a photo and filter digital noise only in smooth portion of the image to achieve optimum results.

After removing with Noise Ninja the noise of a digital photo add noise with Photoshop to simulate the analogue film grain.