Desaturation can be achieved and optimized in a variety of ways. First, use the "Image>Adjust>Desaturation" shortcut key Shift Ctrl U to quickly decolorize but irreversible; secondly, add "Black and White Adjustment Layer" to adjust the light and darkness of each color channel to make the grayscale image more layered and suitable for stylized processing; again, use the "Hue/Saturation Adjustment Layer" to slide the saturation slider to flexibly control the overall color drop and support the addition of unified tones; finally, combine the local desaturation of the mask to highlight the key points of the picture, such as retaining the main color and erasing the background color to enhance visual design expression.
Want to make a photo look more textured, or prepare more low-key visual materials for design projects? "Picking out" colors in Photoshop is a very common operation, which is what we often call "desaturation". However, many people only know to click "desaturation" with one click. In fact, there are still many details to adjust, and the effects are very different.
Desaturation is not just "Image> Adjustment> Desaturation"
The easiest way is to select the layer and click on Image > Adjustment > Desaturation (Shortcut key Shift Ctrl U), which can really remove the color quickly. However, this method directly acts on the original layer and cannot be adjusted after modification.
If you want to retain the original color and also change the effect at any time, it is recommended to use the adjustment layer . Click the circular icon at the bottom of the layer panel and select Black and White or Hue/Saturation to generate a non-destructive adjustment layer without affecting the original image content.
"Black and White Adjustment Layer" is more suitable for stylized processing
Although the name is "Black and White", it is actually a very powerful tool. After adding the "Black and White Adjustment Layer", you can adjust the light and darkness of different color channels separately. For example, the brighter red color and the darker yellow color can make the final grayscale image more layered.
For example:
- If you are dealing with portrait photos, you can lighten the red and yellow slightly so that the skin tone looks more natural in black and white mode;
- When dealing with landscape photos, lower the blue color and the sky will look more textured.
This method is more flexible than direct desaturation and is suitable for scenes where detailed control of the mood of the picture is required.
"Hue/Saturation Adjustment Layer" is suitable for fast uniform color reduction
If you just want to reduce the color intensity as a whole, instead of turning completely into black and white, you can use "Hue/Saturation Adjustment Layer". Pulling the Saturation slider to -100 is equivalent to desaturation, but you can also pull to only -50 or other values ??as needed, retaining a little color atmosphere.
In addition, this adjustment layer has a hidden trick: clicking the "Coloring" option can add a unified color tone to the entire screen, such as retro brown or cool blue, which is suitable for post-processing of some movie-like feel.
Don't forget that local desaturation is also useful
Sometimes you just want to make a certain part of the picture gray and retain the color of other areas, so you have to use "mask".
For example, if you are repairing a street photo, the background is messy but the subject is wearing a bright colored dress, you can first add a "hue/saturation adjustment layer", then use a black brush to rub the part you want to retain the color on the mask, and the rest will turn gray.
Operation steps:
- Add "Hue/Saturation Adjustment Layer"
- Adjust saturation to -100
- Select the mask and use a white brush to restore the entire picture to desaturate.
- Switch the brush color to black and apply where you want to retain the color
The effect of this is both clean and focused, and is often used in visual designs such as advertising and posters.
Basically that's it. Desaturation looks simple, but using the right method can make the picture more accurate.
The above is the detailed content of How to desaturate in Photoshop. For more information, please follow other related articles on the PHP Chinese website!
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