用 CSS3 将图像转换为灰度
要在 CSS3 中将图像转换为灰度,请使用滤镜属性的灰度值。
示例
让我们看一个示例——
<!DOCTYPE html>
<html>
<head>
<style>
img.demo {
filter: brightness(120%);
filter: contrast(120%);
filter: grayscale(130%);
}
</style>
</head>
<body>
<h1>Spring Framework</h1>
<img src="https://tutorialspoint.com/spring/images/spring-mini-logo.jpg" alt="Spring" width="160" height="150">
<h1>Learn MySQL</h1>
<p>Below image is brighter and has more contrast than the original image above. With that the image is in grayscale:</p>
<img class="demo" src="https://tutorialspoint.com/spring/images/spring-mini-logo.jpg" alt="Spring" width="160" height="150">
</body>
</html>输出

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