PhotoShop "Add" and "Subtract" modes to select colors exactly

Source: Internet
Author: User
Tags color gamut

One, about "add" mode

Formula for Add mode: [(source 1+ Source 2)/Zoom]+ compensation = Result

From the formula, the result can be adjusted by scaling values and compensation values, if the scaling is 1 and the compensation value is 0, then the result = Source 1+ Source 2. Here, let's take this as a prerequisite for discussion.

Conclusion any two "add" in three channels of 1:r, G and B are the result of a color outside the third channel. That

1, red + green = blue color;

2, red + blue = green outside the color;

3, green + blue = red outside the color.

Very interesting, also very good remember it. Give a picture of yourself and try it by "calculation".

Uses: After the "computed" alpha channel is reversed, the blue, green, and red are obtained.

Conclusion "add" after any of the two 2:r, G, b three channels, the result is the color of the third channel complement. That

1, red back + green counter = blue complementary color that is, yellow colors;

2, red inverse + blue = green complementary color is PINKCO;

3, green reverse + blue = Red complementary color is the colour outside the cyan.

(Good reasoning, hehe.) )

Usage: After the "computed" alpha channel is reversed, the yellow, PINKCO, and cyan are obtained.

Conclusion any two of the three channels in 3:r, G, B, and one of them are "added" after each other, and the result is to remove the channel color of the inverse phase and the color (too raozui) of the complement of another channel involved in the calculation. That

1, red inverse + green = Remove the red and green complementary color that is PINKCO;

2, red + green counter = Remove green and red complementary color that is, cyan colors;

3, red back + blue = Remove red and blue complementary color that is, yellow colors;

4, red + blue inverse = Remove the blue and red complementary colors that is, the color outside the cyan;

5, green reverse + blue = Remove green and blue complementary color that is, yellow colors;

6, green + blue anti = Remove blue and green complementary color that is PINKCO.

Usage: After the "computed" alpha channel is reversed, 6 adjacent colors, namely red and PINKCO, green and cyan, red and yellow, blue and cyan, green and yellow, blue and PINKCO, are obtained. In other words, the color gamut is wider and the transitions are more natural.

Ii. about the "minus" mode

"Minus" mode and "add" mode are relative, or how can they be placed in a group? Look down ...

Conclusion any two "minus" in the three channels of 1:r, G and B are the complementary colors of the source 2 color and the source 1 color. That

1, red-green = green + cyan;

2, red-blue = blue + cyan;

3, green-red = red + Pinkco;

4, green-blue = blue + Pinkco;

5, blue-red = red + yellow;

6, blue-green = green + yellow.

This is the same as the "add" mode of Conclusion 3.

Conclusion in 2:r, G, b three channels, after any two reverse phase "minus", the result is the complementary color of source 1 and source 2 color. That

1, red back-green anti = red + Pinkco;

2, red back-blue anti = red + yellow;

3, green anti-red anti = green + cyan;

4, green back-blue anti = green + yellow;

5, blue anti-red anti = blue + cyan;

6, Blue back-green counter = blue + PINKCO.

The result is the same as in the "Add" mode of Conclusion 3.

Conclusion if the source 1 is reversed, the result is the complementary color of the third channel, and if the source 2 is reversed, the result is the 3:r of the third channel. That

1, red-green anti = blue;

2, red one blue anti = green;

3, green-red anti = blue;

4, green-blue against = red;

5, blue-red anti = green;

6, blue-green opposite = red;

7, red back-green = yellow (blue complementary color);

8, red back-blue = PINKCO (green complementary color);

9, green anti-red = yellow (blue complementary color);

10, green back-blue = cyan (red complementary color);

11, blue anti-red = PINKCO (green complementary color);

12, blue back-green = cyan (red complementary color). Category:

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