SEO: display:none

SEO: display:none

Regarding SEO, will Google detect and process a content inside <h1></h1>,
hidden with the display:none CSS property?
HTML:
<header>
<h1>
<a><span>Title</span></a>
</h1>
</header>
CSS:
header h1 a span{
display: none;
}
header h1 a{
display: inline-block;
width: 300px;
height: 50px;
background: url('../img/image.png');
}