ij.io
Class ImageReader

java.lang.Object
  ij.io.ImageReader

public class ImageReader
extends java.lang.Object

Reads raw 8-bit, 16-bit or 32-bit (float or RGB) images from a stream or URL.

Field Summary

double	max
double	min

Constructor Summary

ImageReader(FileInfo fi)
Constructs a new ImageReader using a FileInfo object to describe the file to be read.

Method Summary

byte[]	lzwUncompress(byte[] input) Utility method for decoding an LZW-compressed image strip.
byte[]	packBitsUncompress(byte[] input, int expected) Based on the Bio-Formats PackbitsCodec written by Melissa Linkert.
java.lang.Object	readPixels(java.io.InputStream in) Reads the image from the InputStream and returns the pixel array (byte, short, int or float).
java.lang.Object	readPixels(java.io.InputStream in, long skipCount) Skips the specified number of bytes, then reads an image and returns the pixel array (byte, short, int or float).
java.lang.Object	readPixels(java.lang.String url) Reads the image from a URL and returns the pixel array (byte, short, int or float).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

min

public double min

max

public double max

Constructor Detail

ImageReader

public ImageReader(FileInfo fi)

Constructs a new ImageReader using a FileInfo object to describe the file to be read.

See Also:

FileInfo

Method Detail

readPixels

public java.lang.Object readPixels(java.io.InputStream in)

Reads the image from the InputStream and returns the pixel array (byte, short, int or float). Returns null if there was an IO exception. Does not close the InputStream.

readPixels

public java.lang.Object readPixels(java.io.InputStream in,
                                   long skipCount)

Skips the specified number of bytes, then reads an image and returns the pixel array (byte, short, int or float). Returns null if there was an IO exception. Does not close the InputStream.

readPixels

public java.lang.Object readPixels(java.lang.String url)

Reads the image from a URL and returns the pixel array (byte, short, int or float). Returns null if there was an IO exception.

lzwUncompress

public byte[] lzwUncompress(byte[] input)

Utility method for decoding an LZW-compressed image strip. Adapted from the TIFF 6.0 Specification: http://partners.adobe.com/asn/developer/pdfs/tn/TIFF6.pdf (page 61)

packBitsUncompress

public byte[] packBitsUncompress(byte[] input,
                                 int expected)

Based on the Bio-Formats PackbitsCodec written by Melissa Linkert.