How to reveal part of blurred image where mouse is hovered?

css, html, jquery

Solution

I just want to post an alternative solution. It doesn't have great browser support as it is built on SVG images, masks and filters. I have tested and it works in Chrome 33, Safari 6.1.1 and Firefox 25.0.1.

Let me know what you think: jsFiddle

New version with inverted mask for blurred image jsFiddle

HTML + SVG

<div class="pic">
    <svg class="blur" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="100%">
        <image filter="url(#filter2)" xlink:href="http://i.imgur.com/IGKVr8r.png" width="100%" height="100%"></image>
        <filter id="filter2">
            <feGaussianBlur stdDeviation="5" />
        </filter>
        <mask id="mask1">
            <circle cx="-50%" cy="-50%" r="30" fill="white" filter="url(#filter2)" />
        </mask>
        <image xlink:href="http://i.imgur.com/IGKVr8r.png" width="100%" height="100%" mask="url(#mask1)"></image>
    </svg>
</div>

CSS

body {
    margin: 0;
}
.pic {
    text-align: center;
    position: relative;
    height: 250px;
}
.blur {
    height: 100%;
}
.overlay {
    position: absolute;
    top: 0px;
    left: 0px;
    height: 100%;
}

JavaScript

$('.pic').mousemove(function (event) {
    event.preventDefault();
    var upX = event.clientX;
    var upY = event.clientY;
    var mask = $('#mask1 circle')[0];
    mask.setAttribute("cy", (upY - 5) + 'px');
    mask.setAttribute("cx", upX + 'px');
});

Problem

How to reveal part(small portion) of blurred image where mouse is hovered??Currently it blurs whole image but I want the part of the blurred image where the mouse is pointing to be revealed. HTML ``` <!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Anoop</title> <link rel="stylesheet" type="text/css" href="style.css"> </head> <body> <div class="blur pic"> <img src="adv_logo.png" alt="plane"> </div> </body> </html> ``` CSS ``` .blur img { -webkit-transition: all 1s ease; -moz-transition: all 1s ease; -o-transition: all 1s ease; -ms-transition: all 1s ease; transition: all 1s ease; } .blur img:hover { -webkit-filter: blur(1px); } ```

Original source