Convert BufferedImage to Byte Array in Java

In this article, we will see how to convert BufferedImage to Byte Array in Java.

💡 Outline

To convert BufferedImage to byte array, you can use below code:

Convert BufferedImage to Byte Array in Java

BufferedImage bufferedImage = ImageIO.read(new File("c:\\sample.png")); ByteArrayOutputStream baos = new ByteArrayOutputStream(); ImageIO.write(bufferedImage, "png", baos); byte[] byteArr = baos.toByteArray();

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BufferedImage bufferedImage = ImageIO.read(new File("c:\\sample.png"));     ByteArrayOutputStream baos = new ByteArrayOutputStream();     ImageIO.write(bufferedImage, "png", baos);     byte[] byteArr = baos.toByteArray();

Java BufferedImage to Byte Array

Here are steps to convert BufferedImage to Byte Array in java:

• Create instance of ByteArrayOutputStream baos.
• Call ImageIo.write() with bufferedImage, formatName such as png,jpg etc. and baos as parameters
• Get byte array from ByteArrayOutputStream baos by calling toByteArray() method.

Here is complete program:

Convert BufferedImage to byte[] without writing to disk

In case you have large amount of BufferedImages and do not want to write to disk, you can use following code as per this stackoverflow thread.
{!{pre code="java" title="BufferedImage to byte[] without writing to disk"}!}czo5MzpcIg0KYnl0ZVtdIGltYWdlQnl0ZXMgPSAoKERhdGFCdWZmZXJCeXRlKSBidWZmZXJlZEltYWdlLmdldERhdGEoKS5nZXREYXR7WyYqJl19YUJ1ZmZlcigpKS5nZXREYXRhKCk7DQpcIjt7WyYqJl19{!{/pre}!}

Above code will create copy of image. If you are looking for direct reference you can use bufferedImage.getRaster().getDataBuffer().

That’s all about how to Convert BufferedImage to Byte Array in Java.