Techniques of using PS cutout in image processing

Tips for using PS cutout in image processing

The so-called "cutout" is to separate a certain part or part of the image from the original image. Proficient in cutting out images is a difficult step in learning Photoshop. Below I have searched and sorted out the techniques for using PS cutout in image processing for everyone. Welcome to read for reference. I hope it will be helpful to everyone! If you want to know more relevant information, please continue to pay attention to our training website for fresh graduates!

< p> In today’s news photo photography, there are many softwares that use computers for image processing, including the commonly used “Picture, Sound, Picture, Shadow” and “Photoshop”, etc., and cutout is the most commonly used technology in picture processing, and there are many methods. , now we will introduce and learn the application of various techniques related to cutout in Photoshop.

The Photoshop toolbox provides simple and commonly used cutout tools, such as: marquee, lasso, magic wand, path, quick mask, etc. In the selection menu, there is a color range selection, and in the filter There are also extraction tools. Using one of them alone often fails to meet the design requirements. Different extraction methods for different images are the key to cutout learning. Therefore, it is necessary to learn to comprehensively utilize these cutout methods. This article aims to provide an overview of effective concentrated cutout techniques in Photoshop, and I hope it will be helpful to everyone.

1. Magic wand

The magic wand tool is one of the tools for creating selections. Its function is to adjust the selection within a certain tolerance value (tolerance, the default is 32 ) to select areas with the same color at the same time. If the background is a pure color, first click on the background color with the magic wand to select the background color. Next, select [select]?[modifv]?[expand] in order. This is the option to expand the selection. In the pop-up expand Add a value of 1 in the selection dialog box, then select [select]?[feather] (feather option), also add a value of 1 in the pop-up menu, add a moderate feather effect to the edge of the selection, and finally press [ctrl+shifi +I] shortcut key inverts the selection, and the character selection is completed.

Advantages: Entry-level skills, simple technology. Easy to master. Disadvantages: It is only suitable for pictures with simple backgrounds, and the selection effect is relatively rough. It is more suitable for selecting pictures with less details, or the selected portrait will appear several times smaller in the new application, which can minimize the selection of details. shortcomings.

2. Path editing tool

Because it has nodes, you can add or delete them at will. The path curve can be adjusted at will, so path is a good tool for creating selections. First, create a rough selection around the part of the image you want to cut out. You can use the las-so tool. As long as it is rough, it is not required to be precise. After the selection is created, execute the windows/path menu and switch Go to the path panel, press the triangle menu in the upper right corner, and select the "make work path" command. The tolerance value that pops up in the pop-up dialog box defaults to 2. In this way, a rough path around the selected part of the image is completed. Next, edit the path: first select the pen tool in the toolbox, hold down the [ctrl] key, and the pen tool will be changed to node editing. Release the [ctrl] key, and the pen tool will be in the path. It becomes a tool for adding nodes, and placing it on a node becomes a tool for deleting nodes. Press and hold [ctrl+spacebar] to switch to the magnifying glass tool. This operation can avoid frequent tool switching. To edit the path, you mainly need to delete unnecessary nodes, add nodes where the path direction is controlled, and then hold down the [ctrl] key and click on a node in the node editing state, and a handle will appear (tangent lines and their hollow squares at both ends). By adjusting the handles, change the curvature and direction of the path's curve so that it matches the edge of the selected image part. The effect to be achieved by path editing is to use as few nodes as possible, a smooth curve path as possible, and select the image as accurately as possible.

After completing the path editing according to the above requirements, return to the path panel, press the [ctrl] key, and click the path label with the left mouse button. The path has been transformed into an ant line in the selected area. In this way, a fairly accurate The constituency is realized.

Advantages: 1. Not subject to background restrictions; 2. If you have enough patience, you can achieve very precise selections without feathering.

Disadvantages: There is nothing you can do about tiny images (the most common ones are characters’ beards and hair, thin branches and leaves).

3. Select images in channels

Channels in Photoshop are closely related to selection. Create a selection at will, and then execute [se, lect]?[save seletion], In the dialog box that pops up to save the selection, select Save to a new channel (new), then name the channel (enter the new name after name). After completion, go to the channel panel. Is there an extra channel? Use the mouse Left-click on the new channel label, you can see that the selected area saved in the new channel is displayed in white, while the unselected area is black. When you edit an image in full-color mode and need to load a saved selection, execute [select]?[load sele-tion], select the correct channel name in the pop-up dialog box, and your saved selection will be displayed. (That's the white area). In the channel of the saved selection, white is the selection and black is the unselected part, while gray represents the gradient and transition of a color in the selection information.

Use the selection and channel relationship, combined with the levels (color level adjustment) tool. It is easy to select certain images. Take the selection of a character's hair as an example. First go to the channel panel. In RGB mode, view the three channels of R, G, and B individually in order to find the channel with the largest black and white contrast. Use Drag the mouse to the (creat new channel) button on the bottom right of the channel panel to copy a channel, and then click the copied new channel to edit: First, use the square selection tool to select the character's avatar. Create a selection around it and use the [ctrl+I] shortcut key to bring up the Level Adjustment Panel. There are three eyedropper icons on the lower right side of the panel. Click on the white eyedropper on the right to absorb the gray area outside the avatar in the selection, and the gray will turn to white. Click the black straw on the far left to absorb the black part of the hair, and the blackness will be strengthened. By repeatedly sucking, the remaining part of the hair will become white. There are two points to note here: 1. White is the future selection, so After adjusting to the desired effect, use the [ctrl+l] shortcut key to invert the color of the image and turn the hair area into white. 2. When selecting the character's hair, remember the magic of gray. If you click the hair completely with a black straw. Pure black, then what you will see in the selection in the future will be a pool of ink. It is very important to retain appropriate color transitions. After completing the color level adjustment, invert the square selection, fill the unedited part with black, and finally use [ctrl +D] Cancel the selection. If the channel is selected in full color, the hair part will be selected accurately and delicately.

Advantages: Can select finely divided images.

Disadvantages: The process is more complicated. p>

4. Use the extraction filter tool to select the image

This is also a more detailed selection method, and the process is much simpler than the channel. As we all know, the fluffy outline of the chick is more difficult to select. , you can use the extraction filter tool to select the image. 1. Select the extraction tool in the filter and enter the extraction tool interface. Use the edge highlighter tool to outline the edge of the chicken. Select an appropriate value of about 30 for the stroke size. Because the hair on the back of the chicken is longer, cover all the edges, and be careful to close the edges. 2. Select the fill tool to fill in the color, and use the default color. The purpose is to tell which parts of the image need to be small after 0k. Cut out the chicken from the background and fill it with white. 3. Use the clear tool to modify the details, clean the edges, and blur the edges for a better effect.

5. Use masks to select images

The principle of Photoshop masks: Photoshop masks convert different gray values ??into different transparency, and apply it to the layer where it is located, so that the transparency of different parts of the layer will be corresponding. Change. Black is completely transparent, white is completely opaque.

First create a rough selection around the part of the image you want to cut out. You can use the Lasso tool or the path tool to outline the selection. OK, no need to be precise. After the selection is created, click the mask mode in the lower part of the toolbox to enter the mask, and use the brush tool or eraser tool to modify the edges.

Advantages: It is easy to modify, and there will be no regrets caused by using the eraser or cutting to delete.

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