Freehand
At present, the use of vector graphics is becoming more and more widely used. Of course, if you are good at hand-painting, it is the best. A method of converting a bitmap into a vector diagram. At present, there are many softwares that can complete this work, and the trace tool built in Freehand can easily realize the conversion from bitmap to vector diagram.
Conversion steps:
Import the bitmap into Freehand with the Import command, and then use the magic wand-like trace tool on the floating toolbar The default setting of .trace can cope with most conversions, but for those who are striving for perfection, it cannot be satisfied on this. We also need to learn to configure different conversion parameters according to the actual situation to get the best conversion effect.
First, you need to import the bitmap that needs to be converted into Freehand. Please use the Import command. When the right-angle symbol appears, click once in the drawing area. If you are creating a new blank file, the bitmap will lead to the Foreground layer. If necessary, adjust the position first. To prevent accidental movement of it in the future, first lock the layer where the bitmap is located, and then click on the top right The black triangle creates a new layer above the Foreground layer. This layer is used to place the converted vector graphics separately. (The situation of the current layer panel is shown in the figure)
Here I imported a picture of peach blossoms to experiment. See the magic wand on the floating toolbar Does the icon look like? It is the trace tool. After clicking it, drag an area directly above the bitmap. The bitmap contained in the area will be converted into a vector image. If you need to convert the entire picture like me now, just make the dragged area Just cover the whole picture. The entire conversion time is based on the complexity of the graphics and your machine configuration. Like this relatively simple image, there is almost no delay and the result comes out. What you are seeing now is dense nodes. The effect is still unclear. Please temporarily hide Foreground, then hold down Ctrl and click on the blank space. Now that you see the final effect, please compare the original bitmap with this vector image converted using the default settings. Is the effect very good?
It can be said that the default settings of the trace can cope with most conversions, but you ca n’t meet this if you are more than perfect. We have to learn to configure different conversion parameters according to the actual situation to get the best conversion effect.
Double-click the trace icon Open the setting window (as shown on the right), you can see that there are many parameters that need to be set here, but don't worry, let's take a closer look at them one by one.
1. Color mode: used to select the color mode. Here you can set whether the final vector image is in color or grayscale, RGB or CMYK mode, and you can determine the number of colors. The more the number of colors, the final The more delicate the effect, up to 256 colors, 16 colors are enough in actual use.
2. Resolution: the resolution, the normal default is generally good, unless you need more details, then you can set it to High.
3. Trace layers: selection of conversion layers, Foreground--foreground layer, Background--background layer, All--all layers, here our bitmap is in the Foreground layer, so we choose it.
4. Path conversion: conversion method. This is the most important setting, which will directly affect the final effect. Let's take a look at each item:
Outline: It will convert the bitmap into individual vector color blocks, which can overlap each other. This is the default option, which can be said to be suitable for most situations. There is a small option under it-Path overlap, The path overlap item is generally set to Loose or Tight, where Tight can produce a finer effect, and None is suitable for converting bitmaps of pure lines or text.
Centerline: Contrary to Outline, it uses lines to present the effect, which is more suitable for images with many lines and few fills. The following Uniform lines when selected indicate that a uniform line width of 1 point will be used, and the line width will change thickness after unselected. (Pictured)
Centerline / Outline: Combining the above two situations, the line color block has both, mainly analyzed by the software itself, you can also set the conversion value of their conversion, Open path below, the larger the value, the final conversion into lines The more, conversely, the color patches will increase accordingly. (Pictured)
Outer edge: It is a special item. It only produces the outline of the outer edge. You can fill it in to create some special effects. Of course, if you cooperate with paste inside, you can easily remove the background of the bitmap. (Pictured)
5. Trace conformity: the unity of transformation, the higher this value is, the closer it is to the original image, and of course the nodes will also increase significantly.
6. Noise tolerance: Noise tolerance, which is also a very important setting. The lower the tolerance is, the closer it is to the original image. The higher the tolerance, the more details will be lost. In order to explain the problem, we only convert the branch part to see. The left picture has a tolerance of 5, and the right picture has a 15. The color block on the top is clearer. The left has a low tolerance, so it is reserved internally. The noise on the right is ignored. Do n’t underestimate these subtle noises. Because it is a vector graphic, the number of bytes in the image is easily increased because of them. For this picture, we don't need too much detail, so a tolerance of 15 is more appropriate.
Remove branches with a tolerance of 5
Remove branches with a tolerance of 15
7. Wand color tolerance: color tolerance, this item is only meaningful when selecting the conversion area according to the color. If you have used Photoshop, you should remember that it also has similar items in the magic wand settings. The larger, the looser the selection, and all close colors will be selected.
For this picture, we only need to modify the noise tolerance, the effect after conversion is as shown.
Tolerance of 5 whole branches
The entire branch with a tolerance of 15
Compared with other software, Freehand and Flash are the finished products of a company, just like a brother, so the converted vector graphics can be copied and pasted directly into Flash, there is no compatibility problem.
Final optimization: For the final vector diagram, the best situation is to be as close to the original image as possible and the number of bytes stored should be as small as possible, so you can optimize it further if necessary. There are two methods provided here:
The first: do it in Freehand, please select all the vector images, select Modify> Alter path> Simplify from the menu, set an Amount value, remember not to be too greedy, set it to 1 is almost, too high and easy to deform.
The second type: optimization in Flash. Select all the vectors first, then press Ctrl + B, break them up, and select Modify> Optimize to optimize, but we do not recommend using it to optimize, because sometimes the graphics will change a lot.
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