在这篇文章中，我们将帮助您在Windows 11/10的 Paint.NET 中创建透明图像^{(create a Transparent Image in Paint.NET)}。假设您有一个带有白色或其他背景的 PNG 图像，并且您希望该PNG图像^(PNG)具有透明背景 - 或者您有一个 QR 码，您想从中删除白色区域。然后在这种情况下，您可以使用Paint.NET并从图像中删除背景。图像中的前景对象或项目将保持原样，而背景像素将一无所有。图像准备好后，您可以将其保存为PNG图像或其他支持透明背景的受支持格式。

Paint.NET还带有为整个图像设置不透明度级别的功能。因此，您可以简单地使整个图像半透明或根据需要设置不透明度级别来调整图像透明度，而不是使图像背景透明。这篇文章涵盖了两种方式。

在Paint.NET^(Paint.NET)中创建透明图像

使用其桌面快捷方式或开始^(Start)菜单打开Paint.NET 。之后，使用Paint.NET中的“^(Paint.NET)文件^(File)”菜单打开要删除其背景的图像。

之后，按F5热键打开它的Tools。它将出现在左侧（见下图）。在那里，选择魔棒工具^{(Magic Wand)}。

现在按住 Ctrl 键^{(press n hold Ctrl key)}并使用鼠标左键使用魔棒工具^{(Magic Wand)}选择要删除或使其透明的区域。仔细^(Carefully)选择区域。如果魔棒工具^{(Magic Wand)}选择了您不想从图像中删除的其他区域或像素，则使用可用滑块调整容差级别，如下面的屏幕截图所示。

您可能需要多次重复此过程，直到获得确切的区域或像素。

除此之外，您还可以借助放大^(Zoom-in)选项和橡皮擦^(Eraser)工具来选择正确的区域并删除/添加像素。这可能需要一些时间，但您必须精确地完成才能获得良好的输出。

完成后，按Delete键。你会注意到所有这些区域都被删除了，背景现在是透明的。

最后，您可以使用“文件^(File)”菜单 中的“另存为”将图像保存为^{(Save as)}PNG或其他支持透明背景的格式。

设置^(Set)不透明度级别以调整图像透明度

如果您不想使图像背景透明但调整整个图像的透明度级别（在0-255之间），则可以使用其他步骤。

为此，打开Paint.NET并添加图像。现在按F4热键，您将看到图层属性^{(Layer Properties)}框。

在该框中，将不透明度^(Opacity)滑块从左向右移动以将图像透明度从 0 调整为 255。不透明度将降低，图像的透明度将增加，您还可以看到实时图像。

相关：^(Related:) 在 Paint.NET 中裁剪和旋转图片^{(Crop and rotate a picture in Paint.NET)}。

将不透明度级别设置为 0 将使图像完全不可见，这没有任何意义。因此，根据您的需要调整不透明度级别。设置透明度级别后，按OK按钮。之后，您可以使用“文件”菜单中的“^(File)另存为^{(Save as)}”将输出图像存储在任何文件夹中。

希望它是有帮助的。

How to create Transparent Image in Paint.NET on Windows 11/10

In this post, we will help you create a Transparent Image in Paint.NET on Windows 11/10. Let’s say you have a PNG image with white or some other background and you want that PNG image with a transparent background – or you have a QR code from which you want to remove white areas. Then in such a case, you can use Paint.NET and remove the background from the image. The foreground objects or items in the image will remain as it is and the background pixels will have nothing. Once the image will be ready, you can save it as a PNG image or some other supported format that supports a transparent background.

Paint.NET also comes with the feature to set the opacity level for the entire image. So, instead of making the image background transparent, you can simply make the entire image semi-transparent or set the opacity level as per your needs to adjust image transparency. This post covers both ways.

Create a Transparent Image in Paint.NET

Open Paint.NET using its desktop shortcut or Start menu. After that, use the File menu in Paint.NET to open an image whose background you want to remove.

After that, press the F5 hotkey to open its Tools. It will appear on the left side (see image below). There, select the Magic Wand tool.

Now press n hold Ctrl key and use the left mouse button to select areas using the Magic Wand tool that you want to remove or make transparent. Carefully select areas. If the Magic Wand tool selects other areas or pixels that you don’t want to remove from the image, then adjust the tolerance level using the available slider, as visible in the screenshot below.

You might need to repeat this process multiple times until you get the exact areas or pixels.

In addition to that, you can also take the help of the Zoom-in option and Eraser tool to select correct areas and remove/add pixels. This might take time but you have to do it precisely to get a good output.

Once you’ve done that, press the Delete key. You will notice that all those areas are removed and the background is transparent now.

Finally, you can save the image as PNG or another format that supports transparent background using Save as available in the File menu.

Set the opacity level to adjust image transparency

In case, you don’t want to make the image background transparent but adjust the transparency level (between 0-255) of the whole image, then you can use other steps.

For that, open Paint.NET and add an image. Now press F4 hotkey, you will see the Layer Properties box.

In that box, move the Opacity slider from left to right to adjust the image transparency from 0 to 255. Less will be the opacity, more will be the transparency level of the image, and you will also be able to see the changes in the image in real-time.

Related: Crop and rotate a picture in Paint.NET.

Settings opacity level to 0 will make the image completely invisible and that won’t make any sense. So, adjust the opacity level as per your needs. When the transparency level is set, press the OK button. After that, you can use Save as in the File menu to store the output image in any folder.

Hope it is helpful.

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