Photoshop Tutorial To change the color of a flower by calculating commands

This footage is taken from the original film in this book:

This is done by calculating the command system to make the exact selection, and through the channel mixer to the yellow tulip into white.

The production process ibid, is the yellow tulip on the red.

Here is a description of what the calculation command is, a selection generator. The use of a calculation command-generated selection is important in image tuning. How to make a selection by calculating commands. Open the material click Channel Select Red Channel, observe the red channel information. The image information in the channel is shown in black and white.

The purpose of making a constituency is to choose the yellow flower and then change the color of the flower through the channel mixer.

This is the way the Red channel looks:

This is the way the Green channel looks:

This is the blue channel. Through analysis, you can see that the green channel and the blue channel is the most different area is the yellow area. Using this characteristic, the yellow region can be obtained by the difference operation of two channels.

Click the Image menu to select the Calculation command to open the Calculation command Options box. In the interface:

SOURCE 1 Select Green Channel

SOURCE 2 Select Blue Channel

Mixed Mode selection Difference

Result select new Channel

As shown in the figure:

Click OK to get a new channel named: Alpha 1. Let's use the color bands for this channel to enhance the black and white contrast. Click on the black and white parts with a black and white field sampler respectively. Let black and white more trenchant.

Channels can be edited at will, using the same method as normal layers. But only black and white can be used here. Select the soft side brush with black, apply all the flowers to black, and paint the flower area white. This makes a flower all in the white area. This is the flower constituency we want.

Returns the layer selection artwork. Click the Select menu to select the load Selection command in the menu. As shown in figure:

Open the Load Selection panel, select Channel Alpha 1 in the source, and select New selection. The interface is then given a precise flower selection on the yellow flower.

Double-click the layer, change the layer to a normal layer, and click the Add Mask icon below the layers panel to add a mask to the layer, which automatically generates a mask and separates the yellow flowers from the image. As shown in figure:

At this point, you add a layer below the layer and fill in the other colors, you will see the yellow flowers have been selected. This allows the channel mixer to change the color of the flowers.

Right-click on the mask and select Apply Layer mask. The result is as shown in the figure:

Add a channel mixer adjustment layer to the flower layer and the output channel to select the green channel. The constant option in the green channel. Down to (-100), you will find that the flowers have turned red. Why? Take a look at "Toss channel mixer (adjustment layer application)--ps Software Foundation Method 42," will understand.

Yellow is a mixture of green and red, and if you add blue, it turns white. After the restoration, choose the blue channel, the constant of the blue channel increases (+100) The yellow flower becomes white.

Re-channel on the mask to smear the way to do not need to change the color of the place occlusion, it became the head of two pieces, change the color of the picture. See the layer creation and arrangement in the Layers panel.

This is also to allow you to see the layers in the layer panel to understand the operation of the process.

Category:

• PS Image Processing