Add ignoreAlpha option

demoassets/main.js

@@ -121,6 +121,10 @@ $(function(){
 			resembleControl.ignoreAntialiasing();
 		}
 		else
+		if($this.is('#alpha')){
+			resembleControl.ignoreAlpha();
+		}
+		else
 		if($this.is('#same-size')){
 			resembleControl.scaleToSameSize();
 		}

index.html

@@ -98,6 +98,7 @@
 									<button class="btn active" id="less">Ignore less</button>
 									<button class="btn" id="colors">Ignore colors</button>
 									<button class="btn" id="antialising">Ignore antialiasing</button>
+									<button class="btn" id="alpha">Ignore alpha</button>
 								</div>
 
 								<br/>

resemble.js

@@ -692,6 +692,21 @@ URL: https://github.com/Huddle/Resemble.js
 					if(hasMethod) { param(); }
 					return self;
 				},
+				ignoreAlpha: function() {
+
+					tolerance.red = 16;
+					tolerance.green = 16;
+					tolerance.blue = 16;
+					tolerance.alpha = 255;
+					tolerance.minBrightness = 16;
+					tolerance.maxBrightness = 240;
+
+					ignoreAntialiasing = false;
+					ignoreColors = false;
+
+					if(hasMethod) { param(); }
+					return self;
+				},
 				repaint: function(){
 					if(hasMethod) { param(); }
 					return self;