I feel that the works of some friends (especially pages and software interface designs that require high precision) are always troubled by jagged details, which lowers the overall quality. Let me talk about common glitch problems based on my own experience. I write essays, some of them may not be perfect or correct ~ I have always had a bad memory. In addition, pixel style pictures and gif edge jaggedness are no longer within the scope of this discussion.
(This tutorial takes cs3 as an example, and the differences in shortcut keys will not be explained separately. In addition, the new mask control function in cs4 can be used in combination)
1. The aliasing problem caused by ctrl+t class deformation
1-1 Reason: Improper setting of general options (rare case)
Solution: Open the menu [Edit]-[Preferences]-[General]. Make sure your [Image Interpolation] is set to "Bicubic (for smooth gradients)".
Of course, it's another matter if you have special needs and know the meaning of this option (for example, pixel-style scaling generally uses "near" to ensure no blur).
1-2 Reason: sawtooth and deformation caused by rotation and reduction
solve:
1-2-1 Rotate first and then shrink, do it in two steps (split one ctrl+t into two times, and then reduce the last time to reduce the burrs caused by deformation/rotation).
1-2-2 Use vector objects (such as common text perspective deformation, do not select [Rasterize], but use [Convert to Shape]). Vector objects are generally more fidelity deformed, and another significant advantage is that they can withstand repeated ctrl+t without problems.
1-2-3 As large as the drawing is, it is best not to use ctrl+t (especially suitable for simple shapes). In the same way, if you can use less ctrl+t, don't repeat ctrl+t. It is especially taboo to enlarge and reduce, and turn around~~ Combined with the first point: if there is shrinkage, it is best to deform twice, once the shape is in place, and the second time to shrink.
1-3 Reason: When rotating 90 degrees/180 degrees, if midpoint positioning is used, recalculation will occur. Causes blurring or jaggedness.
Solution: To maintain the original appearance as much as possible, it is best to use a corner point (any corner point) when rotating 90 degrees (180 degrees). This avoids the loss of quality caused by recomputing pixels.
2. The aliasing problem caused by filling the selection multiple times
Reason: Repeated filling (including painting, pulling gradients, etc.) causes the semi-transparent pixels originally used for smooth edges to overlap and become increasingly opaque, resulting in solid aliasing.
Solution: (First, place areas that may need to be filled repeatedly on separate layers)
2-1 After filling once, immediately lock the transparent area of the layer. This way, no matter how much you fill it in, the edges won't become solid.
2-2 Use shift fill instead of solid color. When filling the foreground or background color, hold down shift to retain transparent pixels.
2-3 Create a mask using the opaque area (ctrl+[thumbnail] to select the opaque area of the layer, and then click the Add Mask button under the [Layer Panel]);
Or use the next layer (this layer is only filled once, just to define the shape) as a clipping mask. Since the mask is no longer changed, the transparent areas will not change, and there will naturally be no problem with translucent edges.
3. The area selected by selection tools such as magic wand/magnetic lasso has jagged edges.
Reason: aliasing (common rectangular color blocks in jpg images) due to image compression, etc., or inaccurate software differentiation/adsorption caused by other reasons.
Solution: It is best not to mess with poor-quality pictures, or use the [Path Tool] to make selections for such pictures. For a lazy approach, you can use ctrl+d to [feather] a little of the selection after selecting it. The specific amount of feathering refers to the actual use and the degree of sawtooth.
You can also use the [Adjust Edge] control panel to adjust the selection before using it.
In addition, you can also use layer masks to process the edges of such objects (of course it is just a remedy), specifically:
Use ctrl+[Thumbnail] to select the opaque area of the layer, and then click the Add Mask button under the [Layer Panel] to generate a mask. Hold down the alt key and click on the mask (you can see the mask directly); then use [Filter]-[Blur]-[Gaussian Blur] to process the mask to eliminate aliasing on the edges. Then use ctrl+m to open the curve tool, increase the contrast, and distinguish the blurred areas.
Be careful if you pull it too straight and there will be jagged edges -_-|||Please refer to the following steps for details
