# C1.Util.DX.Direct2D.Effects.DirectionalBlur.StandardDeviation

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<h1 id="C1_Util_DX_Direct2D_Effects_DirectionalBlur_StandardDeviation_" data-uid="C1.Util.DX.Direct2D.Effects.DirectionalBlur.StandardDeviation*">StandardDeviation Property
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<h4 id="C1_Util_DX_Direct2D_Effects_DirectionalBlur_StandardDeviation" data-uid="C1.Util.DX.Direct2D.Effects.DirectionalBlur.StandardDeviation">StandardDeviation</h4>
<div class="markdown level1 summary"><p>Gets or sets the amount of blur to be applied to the image. Default: 1.0f</p>
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<h5 class="declaration">Declaration</h5>
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  <pre><code class="lang-csharp hljs">public float StandardDeviation { get; set; }</code></pre>
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  <pre><code class="lang-vbnet hljs">Public Property StandardDeviation As Single</code></pre>
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<h5 id="C1_Util_DX_Direct2D_Effects_DirectionalBlur_StandardDeviation_remarks">Remarks</h5>
<div class="markdown level1 remarks"><p>You can compute the blur radius of the kernel by multiplying the standard deviation by 3. The units of both the standard deviation and blur radius are DIPs. A value of zero DIPs disables this effect entirely.</p>
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