Conditional Not Displaying Content

I'm trying to show a section of my site only if Ansel has images in that section, but when I add the conditional as described in the documentation, the section won't appear. The section and images do appear when the conditional code is removed:

{if "{art_app count='true'}" > 0}
        <section class="whiteBack content">
            <div class="container">
                <div class="row">
                    <div class="col-md-8 col-md-offset-2 col-sm-12">
                        <h2>Art Gallery</h2>
                        <h3>{app_artdescription}</h3>
                        <h4>click to enlarge</h4>
                       
                    </div>
                </div>
                <div class="row imageWrap">

			{app_art}
                    <div class="col-sm-H col-sm-offset-1 squareImage animated" data-animation="fadeInUp" data-animation-delay="400">
                        <a href="{img:url}" class="mobx" data-rel="art"><img src="{img:url}" alt="" class="img-responsive" /></a>
                    </div>            
				{/app_art}
                    
                </div>
                
            </div>
        </section>
{/if}