[Must learn later in photography] A new way of curve color matching!
In the later stage, there are many ways to color: curve, HSL, optional colors, various plug-ins are all available, this time the main explanation is curve adjustment Color part. Curve is one of the most commonly used tools in the later stage. In addition to adjusting the brightness and darkness, it is also very commonly used in color adjustment. It is simply an “artifact” in PS!
Take the humanities film shot on the beach of Bali last year as an example:
Retouch the image
Simply adjust the contrast in cameraraw, open it in ps, click on the curve to adjust the image Layer, the curve adjustment dialog box comes out, the curve has four channels, the RGB composite channel adjusts the light and dark parts, and there are three independent red, green and blue channels to adjust the color.
Many people start to be confused as soon as they learn to color grade. There must be a color circle here.
The three primary colors of red, green and blue are mixed through the filter additive mode
The opposite color of red in the color circle is cyan
The opposite color of green in the color circle is magenta
The opposite color of blue in the color circle It’s yellow
We turn on the red channel, the diagonal half of the curve It represents red, and the lower part represents the color cyan opposite to red. Maybe it’s more intuitive to change the picture to the following
click on the diagonal to create a control point
Drag upwards to decrease blue and red, and drag downwards to decrease red and red.
Of course, the other green and blue channels are the same. Each channel is controlled. Two colors
drag up, add green minus magenta, drag down Move, add magenta and subtract green
Drag up, add blue and subtract yellow, drag down Move, add yellow and subtract blue
After understanding this principle, it’s easy to say
Going back to our example today, the curve is 0-255 , We can control a certain gray scale by adding red upwards, or subtracting red and cyan downwards. Although this can be adjusted theoretically, there are not so many control points in the curve grid, so we roughly add three The curve is divided into two control points: gray and bright parts in the middle of the dark parts
such as the adjustment on the picture, shooting in the evening, so drag the light-receiving part of the bright part upwards, add red, and the dark part backlight part downward Move, add cyan
Red channel is completed
The green channel is not adjusted much, and the highlights are slightly increased. Red, a little green in the dark part
The green channel is completed
The same goes for blue, drag the bright part down, add Drag some yellow, the dark part upwards, add some blue
Blue channel to complete
In terms of color, it is a very subjective thing. Everyone’s thoughts are It’s not the same. This is mainly about how to use curves to color. The curves are ever-changing, and you can adjust the ever-changing colors. After understanding the method, practice more. Flexible use of curve toning, you can control the color change of the gray and dark parts in the bright part
After reading this graphic tutorial, do you think you have re-understood the curve?
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