The following are the related usage methods, hoping to better understand his use!
There is only one magic wand tool for color selection. Now select it, and pay attention to the setting of the male * * * column as shown below. Click on a green square with it, and you will see that all the green squares are selected.
This is the effect of the magic wand tool, which uses color differences to create a selection. Based on the color value of the pixel in the hot spot, find other color pixels within the tolerance range, and then turn them into a selection. The tolerance range is the tolerance of color. For example, the selection of contestants in a unit is divided by age. If it is stipulated that there may be 40 people who meet the standards within the age of 25~35, then these 40 people are equivalent to the "constituency" formed this time. If the standard is 25 to 45 years old, then maybe 80 people are "selected". If the standard is 0~ 100 years old, then all people can be selected. This age range is equivalent to the role of color tolerance. The greater the tolerance, the greater the color tolerance and the more selected parts. On the contrary.
Note that there are two adjacent red and pink squares in the figure. Now we use the default tolerance of 32 and 80 to select the red color, and the result is shown in Figure 2 below. It can be seen that the smaller the tolerance, the stricter the color difference, and even two colors that look very close may not be selected. When the tolerance increases, it can contain more colors.
The operation mode of the selection is * * *, and the magic wand tool is no exception. If you want to select multiple green squares, you can hold down SHIFT to switch to the add mode, and then click one by one. But this is still more troublesome, because the larger the number, the more times the operation will be. At this time, notice that there is a "continuous" option in the public column. Now turn it off, and then click any green color with the magic wand tool, and you will see that all the green squares in the image are selected. As shown below. Although we haven't changed the tolerance, there is a big difference between green and red and pink, so we don't have to worry even if it is 80.
We already know that the magic wand tool looks for other pixels according to the color of the pixel clicked by the hot spot and the tolerance. The direction of this search is to spread from this point in all directions. If the "continuous" option is turned on, once the color beyond the tolerance range is encountered, the search path is terminated. In this way, the selected color will only form a closed selection area.
If the "continuous" option is turned off, the magic wand tool will also use the clicked pixel color as the standard to fit the tolerance, but instead of starting from this point, it will "focus on the overall situation" and find the matching pixels from the whole image. If you want to compare the selection of personnel mentioned above, the former is like selecting age groups in a township, while the latter is selecting age groups in the whole country.
The option "For all layers" will be discussed later.
Now we can also use the magic wand tool to select the sky. Although there are many colors selected with a large tolerance, it will also cause a wrong selection, and it is more troublesome to subtract the wrong selection. Therefore, a safer method is to set the tolerance smaller, and then add more selections. There is no direct shortcut key to change the tolerance value when using the magic wand tool. You can press Enter to enter the value and then press Enter to confirm. As shown below, the approximate effect of clicking on the middle part of the sky after the tolerance is set to 50.
If some sky parts above are not selected, then switch to the add mode, move up and click to add them, as shown below.
Then move down a little and add a selection. As shown below.
Then there will be some chop suey parts left, and you should also pay attention to adding them. If there are many and long distances, you can also use the lasso tool to add them. As shown below. If there are multiple details, you can also use the lasso tool to subtract them.
Then, the sky part selected by magic wand is more accurate than magnetic lasso tool in theory, because magic wand tool has stronger color analysis ability than magnetic lasso tool.
When creating a constituency, you should learn to think from multiple angles. For example, to create a constituency as shown below, all the green squares are selected except the middle one.
If you think rigidly, you will use the magic wand tool to add 10 times to achieve your goal. But in fact, the magic wand tool only needs to be clicked twice, and both of them can be clicked in the same place.
The specific method is to turn off the "continuous" option first, and then click the green square in the middle, and all the green squares are selected at this time. Then open the "continuous" option, switch to the subtraction method and click this green square to achieve the goal.
In the following figure, it is also a two-step process to select all the squares in the picture.
The method is to set the tolerance to 80 or more, then turn off the "continuous" option, click any red square, and then click any green square to complete.
In addition to this "positive thinking", you can also use "reverse thinking" to achieve this effect. That is, use the magic wand tool to click on the white background, and then use the menu to select >; Uncheck [〖SHIFT CTRL I〗]. The effect of deselecting is equivalent to changing the previously selected part into unselected part, and the unselected part into selected part. There is also a hidden shortcut key [〖SHIFT F7〗] for reverse selection.
We selected the sky in front, and now we have to select the part below the sky, or we can use this inverse selection method to complete it. As shown below.
Ok, now we need to select the part between the sky and the wall, that is, subtract the wall part from the above selection. How to modify it?
First of all, the color of the wall is quite different from other parts, so you can use the magic wand tool to subtract it. Use a tolerance of 60 to subtract at the approximate position as shown below.
After subtraction, the effect of the following figure on the left is formed. It can be seen that there are still many miscellaneous parts, which is because the tolerance setting is not large enough. But if a larger tolerance is used just now, other places besides the fence may be subtracted, which will make it more troublesome to modify. Therefore, as mentioned earlier, using the magic wand tool should set a smaller tolerance for multiple selections. Using large tolerance often brings more trouble to later modification.
Now you can use the earliest rectangle selection tool to subtract a large area at a time, as shown on the right below. From the lower left corner of the image to the cursor, because it involves the edge part, it is more convenient to enlarge the image window. The remaining small details can be repaired with lasso tools. From this little exercise, we can initially feel the working mode of comprehensive use of various selection tools.
In fact, there is also a way to choose colors, and choose >; In the color range, it is not too late to learn this later. In addition, Photoshop also provides a "quick mask" to create and modify the selection area. This function was commonly used in earlier versions, but now the function of the selection tool has been greatly enhanced, and this function has become relatively secondary. In order to avoid confusion with layer mask, which we are going to study. I won't introduce it here yet. In addition, there are other ways to create a selection in Photoshop, which will be gradually exposed after learning the later content.
In most cases, the part we need to select has obvious color boundaries with other parts of the image, such as people and background. Therefore, color selection should be considered first, and trajectory selection should be considered second. And in most cases, the accuracy of color selection is greater than that of trajectory selection.