New Thoughts on Photoshop Line Drawing Effect-Creating Beauty Strokes
Author：Eve Cole
Update Time：2009-05-30 20:44:43
The blending mode in Photoshop is difficult to understand. Its essence is a special form of invisible line selection. Through the blending mode, you can determine in a deterministic way which pixels of the color levels are masked or changed. Therefore, understanding the working mechanism of the blending mode is very important for users to use PS in a targeted manner to achieve their goals. The following is an example of how to use the color dodge mode in PS to extract lines in an image, as well as the thoughts it triggers.
Open the image.
The drawing effect generally does not require color preservation. Use the Desaturate command in the Image Adjustments menu and then duplicate a layer.
Use the Invert command in the Image Adjustments menu.
Change the layer blending mode of "Background Copy" from Normal to "Color Dodge" and the document will appear to be empty, but careful readers will find that there are still some black spots on the image. Think about what color level pixels are in the original image?
The key step has arrived: use the "Minimum" filter on the "Background Copy" layer with a radius of 1 pixel. It is this trivial change that creates the subtle difference in the pixel levels of the two layers and extracts the contrasting edges of the image. , while the remaining parts with less strong contrast are ignored.
Tip: It should be pointed out that the traditional drawing line effect uses the "Gaussian Blur" filter, and the effect is not very satisfactory.
Modify the above effects. Double-click the background copy layer to bring up the Layer Styles dialog box and split (hold down the Alt key) the black slider of the next layer to blend the darkest pixels of the background layer into the final image, making the effect appear more natural. .
Although the effect is interesting, I'm afraid not many friends are willing to bother to figure out what the blending mode is. Post the boring stripe diagram and the schematic diagram of the "Color Dodge" mode for the reference of interested friends.
If you understand what the mixed mode is, you have crossed from the kingdom of necessity to the kingdom of freedom.
In the book "The Art of Selection - An In-depth Analysis of Photoshop CS Image Processing", I quoted an American Photoshop master to explain the importance of selection (mixing mode is also a special form of selection).
The master said this: The essence of Photoshop is an art of choice.
