How to deal with noise in PS?

#How to deal with noise in PS?

There are three methods:

1. Image size

In our concept, image size is a way to change the picture The size command is completely incompatible with the denoising function. If your thinking is still stuck in the framework of "a certain tool must be a certain tool", then you should think more divergently.

Now, use PS to open the picture we want to process, and you can see the noise distributed on the black porcelain surface at a glance.

Enter [Image>Image Size] and re-enter the size of the image in Image Size. You can see that the original image size is 1200px wide and 1604px high. We want Make this value larger without changing the proportions of the image, i.e. creating a link between length and width.

The completed image is then scaled to its original size. After comparison, it can be found that the noise has been reduced a lot.

2. CAMERA RAW filter

CAMERA RAW is originally a PS plug-in developed by Adobe, specially used to process RAW files of SLR digital cameras. , after this version of Photoshop CC, this plug-in was integrated into the software and can be used as a filter. The principle of the CAMERA RAW filter to help eliminate noise is to first brighten the noise and then reduce its details. In short, it makes the noise "sink". Open the image we want to process, and you can find that the image quality of the entire image is full of noise, except for the highlights, and the tone is darker and the image quality is unclear.

Find [Filter>Camera Raw Filter], open the filter, and the filter parameter panel will pop up. In the parameters panel, find the "Details" icon, which is the one framed in red as shown below.

In the "Reduce Noise" column, adjust the two parameters of brightness and brightness details. Do not pull up the brightness slider all at once. Too much and it will make the picture look unreal. Move the slider slowly and try to find the best feeling. Different parameter combinations of these two sliders will help you find the balance point, that is, neither distorting the picture nor exposing noise.

Now, you can see the comparison before and after processing with CAMERA RAW filter.

3. Smart sharpening filter

Regarding the sharpening of pictures, PS provides a variety of filters, but we are going to use this one today. The reason why the smart sharpening filter is used to eliminate noise is because this filter has a parameter control called "reduce noise". By adjusting this parameter, you can obtain the effect of eliminating noise. Let us first open this picture. We can see that the noise in this picture is mainly distributed on the face and hair of the character.

At this time, we enter [Filter>Sharpening>Smart Sharpening], open the parameter panel, and while appropriately sharpening, slide "Reduce Noise" ” parameter slider to achieve the desired image quality.

If you find that some noise has not completely disappeared, you can perform the smart sharpening filter again without affecting the overall image quality. Comparing it with before processing, you can see that the annoying noise has disappeared.

Recommended tutorial: "ps tutorial"

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