Google launches support for the schema.org to connect your site with an iconic image.

Via this project, Google aims to help you to be able to specify which image Google uses as your logo in Google search results.
Therefore according to Google, using schema.org Organization
markup, you can indicate to their algorithms the location of your preferred logo. This means a business whose homepage is www.connectikpeople.blogspot.com can add the following markup using visible on-page elements on their homepage:

 <div itemscope itemtype="http://schema.org/Organization">

  <a itemprop="url" href="http:// www.connectikpeople.blogspot.com /">Home</a>

  <img itemprop="logo" src="http:// www.connectikpeople.blogspot.com /logo.png" />

</div>

Now this image is designated as the organization’s logo image for the homepage also included in the markup, and, where possible, may be used in Google search results.

‘’Markup like this is a strong signal to our algorithms to show this image in preference over others, for example when we show Knowledge Graph on the right hand side based on users’ queries.’’ Has said RJ Ryan, Google Engineer.