Haar Wavelet Transform using Java

This tutorial will show you a step by step guide on how haar wavelet transform happens. We will show this implementation with sample data on which we will perform haar wavelet transform.

Haar wavelet transformation basically used in image processing. Using haar wavelet transform you can reduce the size of the image without compromising the quality of the image.

Using haar wavelet transform you can watermark the digital media and it will prevent the digital media from stealing. Even if someone steals your digital media, you can proof that the digital media belongs to you.

Haar Wavelet Transform is based on Lifting Scheme.

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Get Image from Pixels using Java

We will see how we can read an image using Java. We know there are several kinds of image formats such as JPEG, GIF, PNG, BMP, TIFF etc. Java has built-in Image I/O API in javax.imageio package and it can be used to load external image formats into its BufferedImage formats. By default, Image I/O supports image formats such as JPEG, PNG, GIF, BMP, WBMP. It can also be extensible to support additional image formats for TIFF and JPEG 2000.

Image I/O recognizes the contents of the file as a JPEG format image, and decodes it into a BufferedImage which can be directly used by Java 2D.

Image can be load or read using following code snippets, where imagePath is the full path with image name from where the image can be read. Continue reading “Get Image from Pixels using Java”

Get Pixels from Image using Java

We will see how we can read an image using Java. We know there are several kinds of image formats such as JPEG, GIF, PNG, BMP, TIFF etc. Java has built-in Image I/O API in javax.imageio package and it can be used to load external image formats into its BufferedImage formats. By default, Image I/O supports image formats such as JPEG, PNG, GIF, BMP, WBMP. It can also be extensible to support additional image formats for TIFF and JPEG 2000.

Image I/O recognizes the contents of the file as a JPEG format image, and decodes it into a BufferedImage which can be directly used by Java 2D.

Image can be load or read using following code snippets, where imagePath is the full path with image name from where the image can be read.

try {
      BufferedImage bufferedImage = ImageIO.read(new File(imagePath));
    } catch (Exception e) {
      e.printStackTrace();
    }

 

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Read/Write Image using Java

We will see how we can read an image using Java. We know there are several kinds of image formats such as JPEG, GIF, PNG, BMP, TIFF etc. Java has built-in Image I/O API in javax.imageio package and it can be used to load external image formats into its BufferedImage formats. By default, Image I/O supports image formats such as JPEG, PNG, GIF, BMP, WBMP. It can also be extensible to support additional image formats for TIFF and JPEG 2000.

Image I/O recognises the contents of the file as a JPEG format image, and decodes it into a BufferedImage which can be directly used by Java 2D.

Image can be load or read using following code snippets, where imagePath is the full path with image name from where the image can be read.

Continue reading “Read/Write Image using Java”