import java.awt.Dimension;
import java.awt.color.ICC_Profile;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Hashtable;
import java.util.Map;

import org.apache.sanselan.*;

// Code won't work unless these variables are properly initialized. 
// Sanselan works equally well with File, byte array or InputStream inputs.
BufferedImage someImage = null;
byte someBytes[] = null;
File someFile = null;
InputStream someInputStream = null;
OutputStream someOutputStream = null;

// The Sanselan class provides a simple interface to the library.

// how to read an image: 
byte imageBytes[] = someBytes;
BufferedImage image_1 = Sanselan.getBufferedImage(imageBytes);

// methods of Sanselan usually accept files, byte arrays, or inputstreams as arguments. 
BufferedImage image_2 = Sanselan.getBufferedImage(imageBytes);
File file = someFile;
BufferedImage image_3 = Sanselan.getBufferedImage(file);
InputStream is = someInputStream;
BufferedImage image_4 = Sanselan.getBufferedImage(is);

// Write an image. 
BufferedImage image = someImage;
File dst = someFile;
ImageFormat format = ImageFormat.IMAGE_FORMAT_PNG;
Map optional_params = new Hashtable();
Sanselan.writeImage(image, dst, format, optional_params);

OutputStream os = someOutputStream;
Sanselan.writeImage(image, os, format, optional_params);

// get the image's embedded ICC Profile, if it has one. 
byte icc_profile_bytes[] = Sanselan.getICCProfileBytes(imageBytes);

ICC_Profile icc_profile = Sanselan.getICCProfile(imageBytes);

// get the image's width and height. 
Dimension d = Sanselan.getImageSize(imageBytes);

// get all of the image's info (ie. bits per pixel, size, transparency, etc.) 
ImageInfo image_info = Sanselan.getImageInfo(imageBytes);

if (image_info.getColorType() == ImageInfo.COLOR_TYPE_GRAYSCALE)
System.out.println("Grayscale image.");
if (image_info.getHeight() > 1000)
System.out.println("Large image.");

// try to guess the image's format. 
ImageFormat image_format = Sanselan.guessFormat(imageBytes);
image_format.equals(ImageFormat.IMAGE_FORMAT_PNG);

// get all metadata stored in EXIF format (ie. from JPEG or TIFF). 
// org.w3c.dom.Node node = Sanselan.getMetadataObsolete(imageBytes); 
IImageMetadata metdata = Sanselan.getMetadata(imageBytes);

// print a dump of information about an image to stdout. 
Sanselan.dumpImageFile(imageBytes);

// get a summary of format errors. 
FormatCompliance format_compliance = Sanselan
.getFormatCompliance(imageBytes);