OutOfMemoryError: Java heap space / Builder.asBufferedImage

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What steps will reproduce the problem?
Load 20 differents images (not necessarily large ones).

What is the expected output? What do you see instead?
BufferedImage thumbnail = Thumbnails.of(image).size(Integer.parseInt(width), 
Integer.parseInt(height)).scalingMode(scalingMode).outputQuality(quality).asBuff
eredImage();

Exception in thread "http-bio-8280-exec-9" java.lang.OutOfMemoryError: Java 
heap space
    at java.awt.image.DataBufferByte.<init>(DataBufferByte.java:42)
    at java.awt.image.Raster.createInterleavedRaster(Raster.java:248)
    at java.awt.image.BufferedImage.<init>(BufferedImage.java:370)
    at net.coobird.thumbnailator.resizers.ProgressiveBilinearResizer.resize(Unknown Source)
    at net.coobird.thumbnailator.makers.ThumbnailMaker.makeThumbnail(Unknown Source)
    at net.coobird.thumbnailator.makers.FixedSizeThumbnailMaker.make(Unknown Source)
    at net.coobird.thumbnailator.Thumbnailator.createThumbnail(Unknown Source)
    at net.coobird.thumbnailator.Thumbnails$Builder.asBufferedImage(Unknown Source)

What version of the product are you using? On what operating system? Which
version of Java (Sun/Oracle? OpenJDK?) ?
java version "1.6.0_51"
Java(TM) SE Runtime Environment (build 1.6.0_51-b11-457)
Java HotSpot(TM) 64-Bit Server VM (build 20.51-b01-457, mixed mode)

thumbnailator-0.4.6

Eclipse.ini
-Xmn512m
-Xms1024m
-Xmx2048m
-Xss4m

Please provide any additional information below.
Issue 44 and 46 are kinda the same problem.

Original issue reported on code.google.com by lucasbme...@gmail.com on 2 Dec 2013 at 5:06