如果您是GIMP新手，那么我们怀疑您在执行基本任务时可能会遇到问题。例如，您可能想知道用户是否甚至可以裁剪、旋转和调整照片大小。嗯，答案很简单。
(Crop)在GIMP中(GIMP)裁剪、旋转和更改图像(Image)大小
我们将解释如何根据需要尽可能详细地执行每一项操作，而不会深入了解GIMP的所有功能。当我们说这个开源图像编辑工具已经存在了很长一段时间时，相信我们。
GIMP是业内最好的之一，虽然不是最简单的。虽然它在Windows 10(Windows 10)上运行良好，但我们发现它在Linux上的性能要好得多；但我们今天不会深入研究。在本GIMP教程中，我们将介绍以下主题：
- 如何裁剪图像
- 如何旋转或翻转照片
- 更改图片的尺寸和比例
- 更改JPEG(JPEG)照片的文件大小
让我们更详细地讨论这个问题。
1]如何裁剪图像
人们有一百万零一个需要裁剪图像的理由。幸运的是，使用GIMP可以做到这一点，所以让我们看看需要做什么。
将照片添加到工作区后，请通过工具面板单击裁剪工具，或通过导航到(Crop)Tools > Transform Tools > Crop来采取替代路线。
完成后，鼠标光标将发生变化，表示裁剪(Crop)功能已激活。
现在，要裁剪图像，请单击左键(left-click)，然后在右侧区域拖动鼠标以调整图像。
2]如何旋转或翻转照片
裁剪(Cropping)只是GIMP中图像处理的一个方面。其中之一是旋转或翻转。
例如(Say)，您使用智能手机拍摄了一张照片，但照片是颠倒的或方向错误。使用此工具，您可以将角度设置为正确的角度，并且也不难完成。
好的，所以当涉及到旋转或翻转时，请将您的图像添加到工作区，然后单击Image > Transform。从这里，您可以选择任何可用于旋转和/或翻转照片的选项。
阅读(Read)：如何使用 GIMP 从视频文件创建动画 GIF(How to create Animated GIF from a video file using GIMP)。
3]更改(Change)图片的尺寸和比例
在GIMP(GIMP)中最简单的操作之一是更改照片的尺寸和比例。也许这张照片对于它所需要的目的来说太大了。在这种情况下，您需要通过将其缩小到正确的尺寸来更改尺寸。
好吧(Alright)，要更改照片的尺寸，请将内容添加到工作区，然后选择Image > Scale Image。立即(Right)应出现比例图像对话框。从这里，设置照片的宽度和高度以将其缩放到正确的尺寸。
完成后，点击底部的缩放按钮，然后通过保存照片完成任务。(Scale)
阅读(Read)：如何使用 GIMP 创建圆形图像(How to create rounded circular images using GIMP)。
4]更改(Change)JPEG照片的文件大小
缩放图像是一回事，但是可以减小文件大小吗？嗯，是的，这是可能的，我们现在将讨论如何做到这一点。
要使照片更小，您必须首先确保它是JPEG文件格式。确认后，选择File > Export，然后添加文件名。完成后，单击框底部的导出按钮。(Export)
您现在应该会看到一个小对话框，其中包含提高或降低图像质量的选项。如果图片之前从未压缩过，则质量为 100。如果是这种情况，请向下拖动按钮以减小尺寸，向上拖动以增加尺寸。
请记住(Bear)，如果尺寸减小，则意味着图片被压缩并且质量会下降。
How to crop, rotate, and change Image size in GIMP
If you are new to GIMP, then we suspect you may have problems performing basic tasks. For example, you might be wondering if it’s even possible for users to crop, rotate, and resize a photo. Well, the answer to that is a simple yes.
Crop, rotate and change Image size in GIMP
We are going to explain how to do each in as much detail as needed without going too deep into all the things GIMP is capable of. And believe us when we say that this open-source image editing tool has been around for quite some time.
GIMP is one of the best in the business, though not the easiest. And while it works quite well on Windows 10, we’ve found that it performs much better on Linux; but we won’t dig into that today. In this GIMP tutorial, we will cover the following topics:
- How to crop an image
- How to rotate or flip a photo
- Change the dimension and scale of a picture
- Change the file size of a JPEG photo
Let us talk about this in more detail.
1] How to crop an image
Folks have a million and one reasons for needing to crop an image. Luckily, this is possible using GIMP, so let’s take a look at what needs to be done.
Once you’ve added the photo to the work area, please click on the Crop tool via the tools palette or take the alternate route by navigating to Tools > Transform Tools > Crop.
After you’ve done that, the mouse cursor will change, indicating the Crop feature is activated.
Now, to crop the image, press the left-click then drag the mouse in the right area to adjust the image.
2] How to rotate or flip a photo
Cropping is just one aspect of image manipulation in GIMP. One of the others is rotation or flipping.
Say for example you took a photo with a smartphone, but it is upside down or in the wrong orientation. With this tool, you can set the angle to the correct one, and it is not hard to accomplish either.
OK, so when it comes down to rotating or flipping, please add your image to the workspace, then click on Image > Transform. From here, you can select from any of the options available to rotate and or flip your photo.
Read: How to create Animated GIF from a video file using GIMP.
3] Change the dimension and scale of a picture
One of the easiest things to do in GIMP is to change the dimension and scale of a photo. Maybe the photo is too large for the purpose it is needed for. In a situation like this, you will want to change the dimension by scaling it down to the right size.
Alright then, to change a photo’s dimension, please add the content to the work area, then select Image > Scale Image. Right away the scale image dialog box should appear. From here, set the width and height of the photo to scale it to the right dimension.
When you’re done, hit the Scale button at the bottom, then complete the task by saving the photo.
Read: How to create rounded circular images using GIMP.
4] Change the file size of a JPEG photo
Scaling an image is one thing, but is it possible to reduce the file size? Well, yes, it is possible, and we are going to discuss how to do it right now.
To make a photo smaller, you must first make sure it is in the JPEG file format. Once that is confirmed, select File > Export, then add the name of the file. After doing that, click the Export button at the bottom of the box.
You should now see a small dialog box with the options to increase or reduce the image quality. If the picture has never been compressed before, then the quality will be at 100. If that is the case, drag the button down to reduce the size, and up to increase.
Bear in mind that if the size is reduced, then it means the picture is compressed and will lose quality.
