How to remove iso noise in cs5




















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Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions. All rights reserved. Publishers of technology books, eBooks, and videos for creative people. Page 1 of 1. In this excerpt from The Adobe Photoshop CS5 Book for Digital Photographers , Scott Kelby shows you how to reduce noise in photos, which is not only one of the most-requested features by photographers, but one of the best in all of CS5.

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Download a free trial version. The Plugin Suite includes: Genuine Fractals Pro is renowned by both photographers and printers for its finesse at increasing images to more than ten times their original size while maintaining the sharpness and detail you started with. Think of this as the industry standard for image resizing. Mask Pro is used to remove the tough stuff — such as hair, smoke and glass — while retaining the fine detail.

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FocalPoint helps to control focus and minimize visual noise. Draw the eye to specific points in your images by using selective focus, depth-of-field and vignette effects. PhotoTune lets you can compare images side-by-side and easily color correct and enhance them. PhotoTune optimizes the dynamic range, color and sharpness of your image without the need to know all the complicated controls in Photoshop like levels and curves.

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It offers a variety of useful features for tackling almost any difficult image, from wispy hair to complex foliage. I haven't done anything with the image yet other than cropped it a little:. As I mentioned, there's three types of noise that the Reduce Noise filter can tackle.

One of them is color noise , usually made up of red, green and blue dots. This image was taken with an inexpensive point-and-shoot camera, a prime candidate for noise, and if I zoom in on the gorilla, we see lots of red, green and blue "splotches" in her fur, especially along the edges between the dark shadow areas and the lighter areas:.

Let's see what the Reduce Noise filter can do for us. The Reduce Noise dialog box contains a large preview area on the left so we can see what we're doing although we can also see what we're doing in the document window itself as long as the Preview option is checked, which it is by default and some sliders and options along the right.

Even though it's not so obvious, the column along the right is actually divided up into different sections, with each section affecting a different type of noise. I've colorized the sections we're most interested in.

From top to bottom, the first two sliders, Strength and Preserve Details colored in green , are used to remove luminance noise, which we'll look at shortly. Next is the Reduce Color Noise slider yellow , which, as you may have guessed, reduces color noise. Below that is a slider we're not going to look at, Sharpen Details not colored , since it has nothing to do with reducing noise.

To get the most out of the Reduce Noise filter, it's best to begin by turning the filter off so it has no effect on the image.

There's no actual "Off" button, but we can accomplish the same thing by dragging all of the sliders to the far left, which sets each option to 0. The current zoom level appears between them.

Click and drag inside the preview area to move the image around as needed:. The first type of noise you'll want to check for and reduce is color noise, those red, green and blue dots like the ones we're seeing in my image. Use the preview window in the dialog box to zoom in on an area that contains color noise. Keep an eye on the preview area as you drag the slider to judge the results so you don't end up dragging too far:.

To quickly get a "before and after" view of the image so you can see how much of an improvement you've made, click and hold inside the preview area. This shows you what the original version looked like. Release your mouse button to see the effects of the Reduce Noise filter.

We can see in the preview window that the red, green and blue dots have been removed. The value you end up using will depend entirely on your image, so it's important to watch the preview area as you drag the sliders:.



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