The principle and application of fireworks channel

We know that almost all the colours seen by the eye are made of three primary colors of optics: red, green, Blue (RGB) composition, and the computer wants to express 16581375 colors, it will not be silly to use the definition of 16581375 colors to express, as with nature, summed up the most basic three primary colors: R, G, B, You can determine the color of a pixel by just giving the ratio of three colors. What are the benefits of doing this? Obviously, since every color is calculated, we can change it by calculation: this is the basis of channel adjustment and even image processing!

Thus, the channel is not proprietary to Photoshop, it is just a form of expression of color. But how does the fireworks we use use the channel? This function does not separate out ah? Please use fireworks to open an image, such as this:

Then select "Filter-> Adjust color-> levels", carefully observe the pop-up dialog box, what do you see? Channel??!! Yes, that's the channel, who said fireworks didn't have a channel concept in the past? Cough, cough ... Well ... ~ ~ now knows where the channel is (the levels and curves are OK, the curve can be understood as a more advanced level adjustment tool), how do we use it?

Try to choose the channel next to the Drop-down box, there are RGB, red, green and blue, synthetic color and three primary colors have, and choose a different color can see the channel options The following chart changes, the chart reflects the color channel in the overall figure of the proportion.

Here's how to take out the channels you need:

1, remove the red channel: The Blue Channel and green channel of the output levels are set to 0 (as shown below), that is, the blue-green channel color elimination, leaving only the information of the red channel ~ This is not taken out;