How to summon a ghost with a magic wand in photoshop synthesis-PS tutorial

This pstutorial describes how to use photoshop to synthesize the ghost scene of the island Lord Chunli holding the magic wand and summon the ghost. it mainly uses the brush, mask, and material overlay. First of all, it states that most of the methods in this article are not original, only my study notes.

Due to my limited level, I cannot guarantee that the statements and understandings in this article are completely correct. At the same time, we welcome your comments and comments.

Making accurate constituency only adjusts the region you want to adjust without affecting other regions is an important step to complete post-adjustment with high quality and efficiency.
Through this period of study, I have made this simple tutorial by combining the methods collected from various places with my own understanding. I think this must be something that beginners want to know most.
Nowadays, many color coloring tutorials have various channels for computing. some DX also don't say why. it is often difficult for beginners to understand and digest,
In fact, part of their purpose in computing is to make a constituency.
The purpose of this simple tutorial is to inspire beginners (the veterans can take advantage of it) and get criticism from everyone,
I can feel some gains, so I will not waste a few hours to sort out the tutorials.




Obviously, the selection range of the two methods is different. See:





2. Intermediate call selection method.

The first method is menu-image-calculation, for example, gray-and gray-reverse-Channel calculation. the hybrid mode is used for stacking. Obtain the alpha channel.



3. implicit selection
Menu-image-computing, such as gray-reverse and gray-reverse channel computing, hybrid mode front-slice stacked. Get alpha channel

SOURCE image:


4. select the color.
The selection-color range method is commonly used. However, you can use the LAB channel to obtain a better selection of commonly used colors.

Ps lab Introduction: The cie l * a * B * color model (Lab) is based on the human's perception of color. The values in the Lab describe that the person with normal vision can see
All colors.
Because Lab describes how colors are displayed, rather than how devices (such as monitors, desktop printers, or digital cameras) generate colors.
The number of specific color materials required, so the Lab is considered as a color model unrelated to the device. The color management system uses Lab as the color mark,
To convert a color from one color space to another.

The brightness component (L) in Lab color mode ranges from 0 to 100. In Adobe Color Picker and color palette, component a (green-red axis) and
The B-weight (blue-yellow axis) ranges from 127 to-128.

Channel a: dark green-50% gray-bright pink, channel B: bright blue-50% gray-yellow. Both channels have the existence of neutral gray.
In this case, the main colors such as green, red, blue, and yellow can be selected.
Take Channel a as an example. 0 indicates medium gray, 0 indicates red zone, and-128--0 indicates Green Zone. Adjust the color of the curve separately.

The color selection method is as follows:
SOURCE image




2. select the green method:
Choose menu> image> compute. for example, obtain the alpha4 channel. Obtain the selected green area.