Package ij.io

Class ImageReader

java.lang.Object
ij.io.ImageReader
public class ImageReader
extends Object
Reads raw 8-bit, 16-bit or 32-bit (float or RGB) images from a stream or URL.

  • Field Summary

    Fields 
    Modifier and Type Field Description
    double max  
    double min  

  • Constructor Summary

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

  • Method Summary

    Modifier and Type Method Description
    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.
    Object readPixels​(InputStream in)
    Reads the image from the InputStream and returns the pixel array (byte, short, int or float).
    Object readPixels​(InputStream in, long skipCount)
    Skips the specified number of bytes, then reads an image and returns the pixel array (byte, short, int or float).
    Object readPixels​(String url)
    Reads the image from a URL and returns the pixel array (byte, short, int or float).
    byte[] zipUncompress​(byte[] input)
    TIFF Adobe ZIP support contributed by Jason Newton.

    Methods inherited from class java.lang.Object

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

  • Field Details

    • min

      public double min

    • max

      public double max

  • Constructor Details

    • ImageReader

      public ImageReader​(FileInfo fi)
      Constructs a new ImageReader using a FileInfo object to describe the file to be read.
      See Also:
      FileInfo

  • Method Details

    • readPixels

      public Object readPixels​(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 Object readPixels​(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 Object readPixels​(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.

    • zipUncompress

      public byte[] zipUncompress​(byte[] input)
      TIFF Adobe ZIP support contributed by Jason Newton.

    • 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) Author: Curtis Rueden (ctrueden at wisc.edu)

    • packBitsUncompress

      public byte[] packBitsUncompress​(byte[] input, int expected)
      Based on the Bio-Formats PackbitsCodec written by Melissa Linkert.