Also, another thing you want to consider before going for noise removal is the output. So, my suggestion is, unless the noise is a distraction, you don’t need to reduce it. You don’t have to reduce noise all the time. It preserves the texture in your photographs. Sharpening increases contrast between adjacent pixels and over sharpening, especially a high ISO or long exposure, creates image noise. Another factor that causes image noise is sharpening. This happens no matter what ISO you used. Noise from post processing: When you try to bring up the exposure of an under exposed photo, noise appears. It is usually apparent in high ISO images. In this type, the noise will be random and is mostly visible in the dark or shadow regions of the photograph.īanding noise or camera dependent noise: This type of noise is due to the brightening up of shadow regions by the camera. Noise due to high ISO: Higher the ISO you use, more the image noise will be. The visibility of these hot pixels depends on the white balance setting or color temperature. Noise due to long exposure: In long exposure photographs, the noise appears as ‘hot pixels’. There are four different causes of image noise: In the digital world, image noise is analogous to film grain. And I will add some dos and don’ts of digital image noise reduction.īefore getting into the noise reduction business, I would like to talk about few things on image noise. Part 2: I will show you how to reduce noise in your images using Lightroom 4. Part 1: I will explain global and selective noise reduction methods, and I will walk you through the various settings of NR in Lightroom 4. There are two ways you can do image noise reduction in Lightroom 4: And one of the smart changes is in the NR section. But, adobe has done some serious changes in Lightroom 4. I was using other noise reduction applications. When I used to use Lightroom 3, I had never relied on it for reducing noise in my photos since it was not that impressive in doing its job.

Noise reduction (NR) in Lightroom 4 is absolutely great.

Reduce noise v4 do it twice