我想用这种模糊效果创建标题背景。有任何库可以随机制作这种类型的东西,使用两种颜色作为源,还是图像?
.myElement {
background-size: cover;
background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAcAAAADCAYAAABfwxXFAAAAYklEQVQYVwFXAKj/AUkdUf8hDh8AXFpKAOXO1gAp+RYAIRgdAJnNwwABs2an/+LZ3gDqCvcAPVVLANm6xAA3CxYAMyIuAAGNTY3/6evjAOT99QAtRTkAHR4UAMuaugAyFSkAiWIgFtwHkmoAAAAASUVORK5CYII=");
width:1000px;
height:500px;
}
答案 0 :(得分:0)
不完全是你想要的,但我发现了这一点,并认为它可能会给你一个开始的地方:Generate a monochrome bitmap image in JavaScript
还找到了这个用于在JS中生成PNG的库:Generating images in JavaScript
答案 1 :(得分:-1)
您可以使用CSS模糊属性来模糊图像。例如:
img {
width: 100%;
}
.blur {
filter: blur(10px);
}
<img class="blur" src="https://cdn-images-1.medium.com/max/2000/1*YRINRZFr0E1FRJ4JpizEMw.jpeg">
或者,放大图像的一部分:
var canvas = document.getElementById('canvas');
var context = canvas.getContext('2d');
canvas.height = window.innerHeight;
canvas.width = window.innerWidth;
function drawPartialImage() {
var base64 = this.result;
var image = new Image();
image.src = base64;
image.onload = function() {
context.drawImage(
image,
Math.floor(image.width * Math.random()),
Math.floor(image.height * Math.random()),
12,
12,
0,
0,
canvas.width,
canvas.height);
}
}
document.getElementById('fileInput').onchange = function(event) {
var file = event.target.files[0];
var reader = new FileReader();
reader.onload = drawPartialImage.bind(reader);
reader.readAsDataURL(file);
}
<input type="file" id="fileInput" style="position: fixed; z-index: 1; top: 0; left: 0;"><br>
<canvas id="canvas" style="position: fixed; top: 0; left: 0; z-index: 0;"></canvas>