I want to show an image from an URL with a certain width and height even if it has a different size ratio. So I want to resize (maintaining the ratio) and then cut the image to the size I want. I can resize with html img property and I can cut with background-image. How can I do both? Example: This image: Has the size 800x600 pixels and I want to show like an image of 200x100 pixels With img I can resize the image 200x150px: <img style="width: 200px; height: 150px;" src="http://i.stack.imgur.com/wPh0S.jpg"> That gives me this: <img style="width: 200px; height: 150px;" src="https://i.stack.imgur.com/wPh0S.jpg"> And with background-image I can cut the image 200x100 pixels. <div style="background-image: url('https://i.stack.imgur.com/wPh0S.jpg'); width:200px; height:100px; background-position:center;">&nbsp;</div> Gives me: <div style="background-image:url('https://i.stack.imgur.com/wPh0S.jpg'); width:200px; height:100px; background-position:center;">&nbsp;</div> How can I do both? Resize the image and then cut it the size I want?


当前回答

.imgContainer {
  overflow: hidden;
  width: 200px;
  height: 100px;
}
.imgContainer img {
  width: 200px;
  height: 120px;
}
<div class="imgContainer">
  <img src="imageSrc" />
</div>

包含的div本质上是通过隐藏溢出来裁剪图像。

其他回答

我所做的是创建一个服务器端脚本,它将在服务器端调整大小和裁剪图片,这样它就会在互联网上发送更少的数据。

它相当简单,但如果有人感兴趣,我可以挖掘并发布代码(asp.net)

使用CSS3,可以通过background-size来改变背景图像的大小,同时实现这两个目标。

在css3.info上有很多例子。

基于您的示例实现,使用donald_duck_4.jpg。在本例中,background-size: cover;正是你想要的-它适合背景图像覆盖整个区域的包含<div>和剪辑多余的部分(取决于比例)。

.with-bg-size { 背景图片:url (https://i.stack.imgur.com/wPh0S.jpg); 宽度:200 px; 身高:100 px; 背景位置:中心; /*使背景图像覆盖<div>的区域,并剪辑多余的*/ background-size:封面; } <div class="with-bg-size">唐老鸭!< / div >

Css3 background-image background-size

谢谢sanchothefat。

我对你的回答有改进的地方。由于裁剪是非常适合每一个图像,这个定义应该在HTML而不是CSS。

<div style="overflow:hidden;">
   <img src="img.jpg" alt="" style="margin:-30% 0px -10% 0px;" />
</div>
<div class="crop">
    <img src="image.jpg"/>
</div>
.crop {
  width: 200px;
  height: 150px;
  overflow: hidden;
}
.crop img {
  width: 100%;
  /*Here you can use margins for accurate positioning of cropped image*/
}

您可以将img标记放在div标记中,但我建议不要在浏览器中缩放图像。它在大多数时候都做得很糟糕,因为浏览器的缩放算法非常简单。最好先在Photoshop或ImageMagick中进行缩放,然后将其漂亮地提供给客户端。