Shulou(Shulou.com)11/24 Report--

In the process of repairing pictures, we will encounter the problem of picture graying, probably because of the grayscale of the RAW file itself, and there are also pictures graying caused by dark lightening. This tutorial will explain the practical skills of removing gray for pictures.

This is a picture case.

First, directly improve the contrast

It is the simplest and roughest way to increase the contrast image directly in PS or ACR, but it also has a great impact on the picture quality, so it is not recommended in grayscale images.

Second, overlay layer to remove ash

Copy the layer to get a copy of the layer

Select overlay in layer mode

Will get a very obvious ash removal effect, or the effect may be excessive, and then appropriately reduce the filling of the layer to the appropriate level.

Third, the medium gray gradually changes to ash.

Select "gradient Mapping" in the lower right corner of the PS interface.

If you choose the gradient mode to black and white, the image will become black and white

If the layer mode is changed to soft light or brightness, the color can be restored and the effect of removing gray can be achieved at the same time, but the filling degree of the layer should also be adjusted appropriately, and this method will reduce the saturation of the picture, so it is necessary to increase the saturation appropriately.

4. Ash removal by S-shaped curve

The S-shaped curve has the least impact on the picture quality, and the grayscale of the picture is large because the brightness of each part is too uniform and lack of contrast. The dark part of the lower left corner of the curve and the bright part of the upper right corner, so lower the lower left corner and appropriately reduce the brightness of the dark part, improve the upper right corner to increase the highlight brightness and increase the contrast between light and shade.

Fifth, gray removal of color levels

"Ctrl + L" opens the color level, such as the picture above, changing the arrows on both sides of the input level and dragging the arrows on both sides to the middle, in fact, increasing the range of black and white fields to increase the contrast, the left arrow tube black field, the right arrow tube white field.

6. Adjust HDR tone to remove ash

Upper left menu bar, image-adjust-HDR tone

The grayscale coefficient option in the window can be removed by adjusting to the left. At the same time, it can adjust the basic parameters of exposure and saturation, which is relatively comprehensive.

Seventh, adjust the exposure to remove ash

Menu bar in the upper left corner, image-adjustment-exposure

Drag the grayscale correction coefficient to the right.

Among the above seven methods, it is recommended that you use overlay layer to remove gray, S-shaped curve to gray, HDR tone to gray, exposure to gray. The other three methods will have a greater impact on picture quality, so use it as little as possible.

This article is from the official account of Wechat: light and Color World of Shadow Leaf (ID:wangyikai-2016). Author: shadow Leaf.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.