Lesson 5 In Li Xiaolei's photography class.

Learning PS: Curves and Masks

1. curve

You can reset the window mode. Notice that the Navigator and Layers are open.

Open the Layer Editor under Layers and select the curve.

Look at the curve first (note that the curve here is different from ctrl+M).

Curve: a line that can brighten or darken a picture. Pull up to brighten, pull down to darken.

The curve can be divided into four regions, of which 2 and 3 are the most important. Area 2 represents bright areas and area 3 represents dark areas. 1 and 4 are both bright and dark, which makes no sense to operate (in fact, Li Xiaolei said that everyone knows it is fart, but for beginners, it will be more convenient to remember. If you want to further improve yourself, not just a preset photographer, then I suggest Baidu).

For example, adding some points to fix the dark area in the third area and adjusting the second area, it is found that only the brightness of the bright area changes. Similarly, the dark areas can be changed independently. The bright area variable darkens the dark area, similar to increasing contrast.

The bright area of the original image is bright enough, and the contrast can be flexibly increased by controlling the bright area and the dark area respectively. More like a highlight shadow of LR.

The opacity here controls the effect produced by the curve tool. You can control the opacity to observe the use of the tool. Do not move the fill and blend modes.

Multiple curves can control different parameters. These curves are independent of each other.

Sometimes you need two curves to brighten up, which is easier to control.

[If! Support list ]2. ? [endif] mask

Mask is the most important in the whole PS!

The whiteboard in this red frame is the mask, and the white inside the mask indicates that the tool is effective in the white area; Black inside the mask indicates that the tool is invalid in the black area.

Click on the whiteboard, then use the brush tool to create a mask, and pay attention to the brush settings. Black brush

You can also paint the whole picture black first, and then draw the effective area with a white brush to create a mask area. Change all masks to foreground color shortcut: alt+del.

The solution of Buddha's light: reduce the brush opacity of the black area of the mask. Generally around 30%.

To make the picture transition naturally, it is necessary to reduce the opacity of the mask edge.

Japanese curves are only suitable for slightly overexposed pictures, so be sure to pay attention to whether the original picture is bright enough before use, otherwise it will get darker as you use it. The Japanese curve must be pulled down when the picture is bright.

The original image is highlighted first.

Add another curve and use a Japanese curve (or use it according to the situation, don't think it's Japanese, so sometimes it's not good. )

The dark parts get brighter and darker. Japanese film, with a little gray hair.

Masks can be used not only on curves, but also on all tools.

PS export picture: RGB first turns to LAB and then back to RGB, which can solve the color difference problem.

A) image mode laboratory splicing

B) image mode rgb stitching

C) save as