Effective Ways to Reducing Noise and Sharpening in Photoshop

• Effectively Remove Digital Capture Noise Noise in digital images can have many sources. Recognizing the digital data and removing it prior to sharpening is a key to creating good quality images.
• Open an image with noise. Look through your channels to identify whether the noise or pattern is distributed symmetrically across all three channels, or if some channels have more noise than others. Why would this matter?
• Remove JPEG Degradation Compression related artifacts are commonly found in many digital camera images as well as web images saved in compressed format. These artifacts can significantly degrade the detail in an image. Applying sharpening to compression artifact just makes them worse, so they must be removed prior to sharpening.
• Learn to recognize the familiar pattern of rectangular pixel pattern groups that are harbingers of compression.
• - Descreen Scanned-In Halftone Patterns Printed images that are captured and digitized will often contain the pattern of the halftone dots (screen pattern) that made up the image.
• Captured print screens are usually made worse by reprinting them, creating patterns known as moiré patterns. So recognizing and removing the screen pattern is critical to perform prior to reprinting.
• Sharpen Images for High-Resolution Print Output Nearly all digital images need to be sharpened. Just the process of capturing an image with a digital capture device such as a scanner or digital camera softens an image.
• Photoshop offers a variety of different sharpening tools. Choosing the best tools and methods is the key to sharp images. Which are the most common, and how do you know when to use each?