PhotoShop Lab mode Adjusts the gray landscape photography late palette tutorial

What is lab in the first section, and what is the situation?

The theory is boring and necessary. I tried to speak out in a lively and simple way.

Before we talk about lab colors, let's take a look at most of the problems that travel photos face. Because of the environment and weather reasons, most of the travel films taken by most people have been greatly restricted. There are few opportunities for sightseeing tours

In a good place to shoot, shelves and other best time to shoot, we can only as far as possible to shoot the exposure accurate, as clear as possible photos, while taking care of the framing, composition.

Such a picture has such a few characteristics, gray, contrast, world contrast beyond the dynamic range of the camera, lighting effect is not satisfactory. Especially to the seaside, the desert, the open grassland, the sky and the mountains.

Wait for the main element of the photo, often in front of the computer to see the disappointment and confusion.

Why, then? Many people will move out of the film how to come, will say how the camera latitude how to come. A lot of time people start to be confused, even start to think whether they will be photography of the problem.

In fact, most of the time we have the material to make a good table, but there is no proper way of cooking. As long as the photographic composition is passable, the exposure is not much deviated, with the help of simple and effective

The latter can get good results.

The problems began to be simplified, the tourist films were grey, lacked contrast and good-looking colors, and most of them were bland, and there was no such thing as the National Geographic magazine. Well, it's not exactly our amateurs.

Not a good problem, but a lack of efficient post-processing links.

A lot of post-processing methods, strengths, I was small rookie to a slightly larger rookie, nearly a year of the process from the shadow magic hand of a key-type fool method to now began to explore Photoshop provides a variety of functions,

Accumulated a number of new experience, and write it, and share with you.

A piece of unfinished artwork, the picture is gloomy and not glorious

After about 45 seconds of lab palette, the pictures are vivid.

Here's where we're going to start: Photoshop's lab palette.

What exactly is lab color?

A lot, we take the simplest statement:

Lab mode is one of the three major color modes used by Photoshop. RGB is dependent on the optical principle, CMYK is dependent on the color of the paint reflected light mode, lab mode does not rely on light, nor rely on pigments,

Make up for RGB and CMYK two color mode of deficiency. Lab is the best way to avoid color loss during image editing, and lab conversion to CMYK does not lose color as it would when RGB turns CMYK.

Lab color mode consists of three data channels, the first is the lightness channel, storing the image of the tone changes, in fact, can be understood to be "the color of the colors of the photo", the reason for that,

Because the other two channels have almost no image "image content", but only color information.

In order to be more intuitive, we started the operation

1, open photoshop[I use Photoshop CS3 extended green version, CTRL + N a new file, as shown in the picture set wide and high, and then determine.

Note: Color can be directly selected as "Lab" in the Pull-down menu, or it can be specified in "image-pattern-lab color" After the file is established

2, after the new file, we are on the right side of Photoshop (Photoshop software layout of the default state, the panel may be elsewhere), in the "layers, channels, paths" Panel selection channel, we can see the following figure shows

Lab is the overall effect because we create grayscale images, so we see only blank squares

L for the Ming degree, we're going to keep this constant and see what happens when a and B change.

A-Include the color from dark green (low brightness value) to gray (medium brightness value) and then to bright pink (high brightness value)

B-Include colors from sky-blue (low brightness) to gray (medium brightness) to dark yellow (high brightness)

3, below we begin to visually examine the color of the AB channel, the mouse click to select a channel, as shown in the following figure

What we see is a gray image, when a channel has no data.

We use the gradient tool to brush the channel from left to right into a black to white gradient (select the tool for the toolbox, the foreground is black, the background is white, and the mouse can be brushed from left to right)