# 如何在 Photoshop 中刪除背景？ > 原文： [https://www.guru99.com/how-to-use-extraction-techniques-in-photoshop-cc.html](https://www.guru99.com/how-to-use-extraction-techniques-in-photoshop-cc.html) **### 如何在 Photoshop 中刪除背景** 作為設計師，我們應該知道一些快速有效的技術，可以從圖像中提取某些特定的對象或設計元素。 我們將在本教程中學習它們。 ## Photoshop 提取/刪除背景：-第一個示例 **步驟 1）**選擇要刪除背景的圖像 這是具有干凈白色背景的模型的圖像，我們要提取模型。  我們可以借助諸如“鋼筆工具”之類的 photoshop 提取工具來提取它，但這將是一項非常耗時的技術。 所以我們不能使用筆。 **步驟 2）**選擇魔術棒工具并選擇背景 因此，現在去抓住“魔術棒工具”，然后在白色背景上單擊將其選中，要添加選擇區域，請按住“ Shift 鍵”，然后單擊要添加到選擇中的部分。  **步驟 3）**套用反 現在我們要提取模型，所以我們必須選擇她，進入選擇菜單，然后選擇“ inverse”，這樣它將反轉選擇。  **步驟 4）**優化邊緣 我們做出了選擇，但是仍然選擇不理想，因為它周圍有非常尖銳的邊緣，并且邊緣上沒有選擇某些像素，并且選擇了一些不需要的像素，因此要解決此問題，請單擊 選項欄上的“優化邊緣”按鈕。  這是精致的邊緣面板。 我正在將查看模式從“黑色&白色”更改為“黑色”。  由于背景為黑色，我們可以看到模型邊緣存在什么問題。 現在開始在模型的邊緣上繪畫，看看它如何從選擇中減去一些不需要的白色像素。  我去除了粗糙的邊緣并使它們更柔和。 讓我將查看模式更改為“黑色&白色”。  請記住，黑色表示“透明”，白色表示“不透明”。 **步驟 5）**使用“擦除細化工具”。 在這里，模型的某些部分是透明的，因此我需要針對該選擇“擦除細化工具”將其刪除并更正選擇。  但這不是一個大問題，因此我們以后可以處理。 **步驟 6）**新層 您可以在此處在模型邊緣的某些特定部分看到一些透明像素。 因此，現在更改“輸出”選項的設置。 從下拉列表中選擇“帶有圖層蒙版的新圖層”。  按確定 您可以在“圖層面板”中看到使用圖層蒙版創建的新圖層。 現在在這里看到這些透明像素。 要處理它，請按 CTRL + J 復制該層。  您可以看到我們的問題已解決。 **步驟 7）**輸出 您可以在這個很酷的技巧的幫助下看到，我們很好地提取了模型。  ## 基于亮度的提取技術。 在這項技術中，我們將討論“基于亮度的選擇”。 看到這里是煙霧的圖像，在煙霧中，某些部分是完全不透明的，而某些部分是半透明的。 因此，我們要提取具有適當透明像素的煙霧。  在先前的技術中，我們已使用“魔術棒工具”進行了選擇，但在冒煙的情況下，這不是合適的技術。 因此，這里我們將使用“通道調色板”。  在通道面板中，按住 CTRL 鍵并單擊通道面板頂部的“ RGB 通道”，它將所有亮度值加載為活動選擇。 它選擇了整個白色背景。  現在轉到選擇菜單，然后選擇逆。  然后按 CTRL + J 來創建所選部分的新層。 您可以在此處看到所選區域的新圖層創建。 但是它看起來很平坦。 因此，要保持其密度，請選擇 CTRL + J 大約 4-5 次。 并合并所有重復的圖層。  現在您可以看到，借助此技巧，我們如何完美地抽出了煙霧。 這稱為**“基于亮度的選擇”** 技術。 ## 讓我們轉到下一個示例。 這是一個模型，我們要非常快地拔出她的頭發。  如果我們在此特定圖像中使用“筆工具”，則將是一個耗時的過程，但是如果我們不需要在此上浪費更多的時間，則可以在“優化邊緣”的幫助下非常好而快速地完成此操作。 “ 選項。  抓住“快速選擇工具”，然后大致選擇模型。 單擊“優化邊緣”選項。  選擇“在圖層上”的查看模式。  并開始在頭發的邊緣周圍繪畫。 您會看到它如何完善頭發周圍的選擇。 看起來一些不需要的像素也從選擇中刪除。 我將把這個選擇作為“帶圖層蒙版的新圖層”。  看這里，使用圖層蒙版創建了一個新圖層，并且很好地提取了模型。  復制圖層，以便我們可以處理模型邊緣周圍的一些透明像素。  因此，這些是在 Photoshop CC 中進行提取的一些很酷而又快速的技巧。 As a designer, we should know some quick and efficient techniques to extract some particular objects or design element from an image. We will learn them in this tutorial. ## Photoshop Extraction/Remove Background:- First example **Step 1)** Select Image whose background you want to remove This is an image of a model with a clean white background, and we want to extract the model.  We can extract this with the help of photoshop extraction tool like "pen tool," but it will be a very time-consuming technique. So we can't use the pen. **Step 1)** Select Image whose background you want to remove This is an image of a model with a clean white background, and we want to extract the model. **Step 2)** Chose the Magic Wand Tool and select background So now go and grab the "magic wand tool" and click on a white background to select it, to add selection area hold "shift key" and click on the portion which you want to add in selection.  **Step 2)** Chose the Magic Wand Tool and select background So now go and grab the "magic wand tool" and click on a white background to select it, to add selection area hold "shift key" and click on the portion which you want to add in selection. **Step 3)** Apply Inverse Now we want to extract the model so we have to select her, go to select menu and choose “inverse” so it will invert the selection.  **Step 3)** Apply Inverse Now we want to extract the model so we have to select her, go to select menu and choose “inverse” so it will invert the selection. **Step 4)** Refine Edges Our selection is made, but still, it is not perfectly selected, because it has very sharp edges selected around it, and some pixel is not selected on edges and some unwanted pixels are selected, so to deal with this problem I'll click on "refine edges" button, up here in option bar.  This is refined edge panel. I'm changing the view mode from "black & white" to "on black."  Because of the black background, we can see what the problem with edges of the model is. Now start painting on edges of the model and see how it is subtracting some unwanted white color pixels from the selection.  I have removed rough edges and made them softer. Let me change the view mode to "black & white."  Keep in your mind that black means "transparent" and white means "opaque." **Step 4)** Refine Edges Our selection is made, but still, it is not perfectly selected, because it has very sharp edges selected around it, and some pixel is not selected on edges and some unwanted pixels are selected, so to deal with this problem I'll click on "refine edges" button, up here in option bar. **Step 5)** Use the "erase refinements tool." Here some part of the model has been transparent, so I need to remove it for that select "erase refinements tool" and correct the selection.  But this is not a big issue so that we can deal with it later. **Step 5)** Use the "erase refinements tool." Here some part of the model has been transparent, so I need to remove it for that select "erase refinements tool" and correct the selection. **Step 6)** New Layer You can see here some transparent pixels around the edges of the model in some specific portions. So now change the setting of "output" option. Select "new layer with layer mask" from drop-down list.  Press ok You can see here in layer panel a new layer is created with a layer mask. Now see these transparent pixels here. To deal with it duplicate the layer by pressing CTRL + J.  And you can see our problem is solved. **Step 6)** New Layer You can see here some transparent pixels around the edges of the model in some specific portions. So now change the setting of "output" option. Select "new layer with layer mask" from drop-down list. **Step 7)** Output You can see with the help of this cool trick we have extracted the model very nicely.  ## Luminosity Based Extraction Technique. In this technique, we will talk about "luminosity based selection." See here is an image of smoke, in smoke, some portion is full opaque while some part is half transparent. So we want to extract the smoke with proper transparent pixels.  In the previous technique, we have made our selection with "magic wand tool," but here it will not be the proper technique in the case of smoke. So here we will use the "channels palet."  In channels panel hold the CTRL key and click on "RGB channel" on the top of the channels panel, it loads all the brightness value as the active selection. It has selected the entire white background.  Now go to select menu and choose Inverse.  Then press CTRL + J to create a new layer of the selected portion. You can see here a new layer is created of the selected area. But it looks very flat. So to maintain it’s density select layer and press CTRL + J for around 4-5 times. And merge all duplicate layers.  Now you can see, with the help of this trick how perfectly we have extracted the smoke. This is called **"luminosity based selection"** technique. ## Let’s move to our next example. Here is a model and we want to extract her hair very quickly.  If we use the "pen tool" in this particular image then it will be a time-consuming process, but if we do not need to waste more time on this, we can do this very nicely and quickly with the help of "refine edge" option.  Grab the "quick selection tool" and select the model roughly. Click on the "refine edge" option.  Select view mode "on layer."  And start painting around edges of the hair. You can see how it is refining the selection around the hair. Look some unwanted pixels are also removed from the selection. I’ll take out this selection as "new layer with layer mask".  Look here a new layer is created with a layer mask and the model is extracted very nicely.  Take a duplicate of layer and so that we can deal with some transparent pixels around edges of the model.  So these are some cool and quick tricks for extraction in photoshop cc. **Step 7)** Output You can see with the help of this cool trick we have extracted the model very nicely.