java.lang.Object
- gov.nih.mipav.model.file.MetadataExtractor.Directory
- - gov.nih.mipav.model.file.MetadataExtractor.JpegDirectory

Enclosing class:

MetadataExtractor
```
public class MetadataExtractor.JpegDirectory
extends MetadataExtractor.Directory
```
Directory of tags and values for the SOF0 JPEG segment. This segment holds basic metadata about the image.

Author:

Darrell Silver http://www.darrellsilver.com and Drew Noakes https://drewnoakes.com

Field Summary

Fields
Modifier and Type	Field	Description
`private java.util.HashMap<java.lang.Integer,java.lang.String>`	`_tagNameMap`
`static int`	`TAG_COMPONENT_DATA_1`	the first of a possible 4 color components.
`static int`	`TAG_COMPONENT_DATA_2`	the second of a possible 4 color components.
`static int`	`TAG_COMPONENT_DATA_3`	the third of a possible 4 color components.
`static int`	`TAG_COMPONENT_DATA_4`	the fourth of a possible 4 color components.
`static int`	`TAG_COMPRESSION_TYPE`
`static int`	`TAG_DATA_PRECISION`	This is in bits/sample, usually 8 (12 and 16 not supported by most software).
`static int`	`TAG_IMAGE_HEIGHT`	The image's height.
`static int`	`TAG_IMAGE_WIDTH`	The image's width.
`static int`	`TAG_NUMBER_OF_COMPONENTS`	Usually 1 = grey scaled, 3 = color YcbCr or YIQ, 4 = color CMYK Each component TAG_COMPONENT_DATA_[1-4], has the following meaning: component Id(1byte)(1 = Y, 2 = Cb, 3 = Cr, 4 = I, 5 = Q), sampling factors (1byte) (bit 0-3 vertical., 4-7 horizontal.), quantization table number (1 byte).

Fields inherited from class gov.nih.mipav.model.file.MetadataExtractor.Directory
_definedTagList, _descriptor, _tagMap

Constructor Summary

Constructors
Constructor Description

JpegDirectory()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`MetadataExtractor.JpegComponent`	`getComponent(int componentNumber)`
`int`	`getImageHeight()`
`int`	`getImageWidth()`
`java.lang.String`	`getName()`	Provides the name of the directory, for display purposes.
`int`	`getNumberOfComponents()`
`protected java.util.HashMap<java.lang.Integer,java.lang.String>`	`getTagNameMap()`	Provides the map of tag names, hashed by tag type identifier.

Methods inherited from class gov.nih.mipav.model.file.MetadataExtractor.Directory
addError, containsTag, getBoolean, getBooleanObject, getByteArray, getDate, getDate, getDate, getDescription, getDouble, getDoubleObject, getErrorCount, getErrors, getFloat, getFloatObject, getInt, getIntArray, getInteger, getLong, getLongObject, getObject, getParent, getRational, getRationalArray, getString, getString, getStringArray, getStringValue, getStringValueArray, getTagCount, getTagName, getTags, hasErrors, hasTagName, isEmpty, setBoolean, setByteArray, setDate, setDescriptor, setDouble, setDoubleArray, setFloat, setFloatArray, setInt, setIntArray, setLong, setObject, setObjectArray, setParent, setRational, setRationalArray, setString, setStringArray, setStringValue, setStringValueArray, toString

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - TAG_COMPRESSION_TYPE
```
public static final int TAG_COMPRESSION_TYPE
```
    See Also:
    
    Constant Field Values
  - TAG_DATA_PRECISION
```
public static final int TAG_DATA_PRECISION
```
    This is in bits/sample, usually 8 (12 and 16 not supported by most software).
    
    See Also:
    
    Constant Field Values
  - TAG_IMAGE_HEIGHT
```
public static final int TAG_IMAGE_HEIGHT
```
    The image's height. Necessary for decoding the image, so it should always be there.
    
    See Also:
    
    Constant Field Values
  - TAG_IMAGE_WIDTH
```
public static final int TAG_IMAGE_WIDTH
```
    The image's width. Necessary for decoding the image, so it should always be there.
    
    See Also:
    
    Constant Field Values
  - TAG_NUMBER_OF_COMPONENTS
```
public static final int TAG_NUMBER_OF_COMPONENTS
```
    Usually 1 = grey scaled, 3 = color YcbCr or YIQ, 4 = color CMYK Each component TAG_COMPONENT_DATA_[1-4], has the following meaning: component Id(1byte)(1 = Y, 2 = Cb, 3 = Cr, 4 = I, 5 = Q), sampling factors (1byte) (bit 0-3 vertical., 4-7 horizontal.), quantization table number (1 byte).
    This info is from http://www.funducode.com/freec/Fileformats/format3/format3b.htm
    
    See Also:
    
    Constant Field Values
  - TAG_COMPONENT_DATA_1
```
public static final int TAG_COMPONENT_DATA_1
```
    the first of a possible 4 color components. Number of components specified in TAG_NUMBER_OF_COMPONENTS.
    
    See Also:
    
    Constant Field Values
  - TAG_COMPONENT_DATA_2
```
public static final int TAG_COMPONENT_DATA_2
```
    the second of a possible 4 color components. Number of components specified in TAG_NUMBER_OF_COMPONENTS.
    
    See Also:
    
    Constant Field Values
  - TAG_COMPONENT_DATA_3
```
public static final int TAG_COMPONENT_DATA_3
```
    the third of a possible 4 color components. Number of components specified in TAG_NUMBER_OF_COMPONENTS.
    
    See Also:
    
    Constant Field Values
  - TAG_COMPONENT_DATA_4
```
public static final int TAG_COMPONENT_DATA_4
```
    the fourth of a possible 4 color components. Number of components specified in TAG_NUMBER_OF_COMPONENTS.
    
    See Also:
    
    Constant Field Values
  - _tagNameMap
```
private final java.util.HashMap<java.lang.Integer,java.lang.String> _tagNameMap
```
- Constructor Detail
  - JpegDirectory
```
public JpegDirectory()
```
- Method Detail
  - getName
```
public java.lang.String getName()
```
    Description copied from class: MetadataExtractor.Directory
    
    Provides the name of the directory, for display purposes. E.g. Exif
    
    Specified by:
    
    getName in class MetadataExtractor.Directory
    
    Returns:
    
    the name of the directory
  - getTagNameMap
```
protected java.util.HashMap<java.lang.Integer,java.lang.String> getTagNameMap()
```
    Description copied from class: MetadataExtractor.Directory
    
    Provides the map of tag names, hashed by tag type identifier.
    
    Specified by:
    
    getTagNameMap in class MetadataExtractor.Directory
    
    Returns:
    
    the map of tag names
  - getComponent
```
public MetadataExtractor.JpegComponent getComponent(int componentNumber)
```
    Parameters:
    
    componentNumber - The zero-based index of the component. This number is normally between 0 and 3. Use getNumberOfComponents for bounds-checking.
    
    Returns:
    
    the JpegComponent having the specified number.
  - getImageWidth
```
public int getImageWidth()
                  throws MetadataExtractor.MetadataException
```
    Throws:
    
    MetadataExtractor.MetadataException
  - getImageHeight
```
public int getImageHeight()
                   throws MetadataExtractor.MetadataException
```
    Throws:
    
    MetadataExtractor.MetadataException
  - getNumberOfComponents
```
public int getNumberOfComponents()
                          throws MetadataExtractor.MetadataException
```
    Throws:
    
    MetadataExtractor.MetadataException

Class MetadataExtractor.JpegDirectory

Field Summary

Fields inherited from class gov.nih.mipav.model.file.MetadataExtractor.Directory

Constructor Summary

Method Summary

Methods inherited from class gov.nih.mipav.model.file.MetadataExtractor.Directory

Methods inherited from class java.lang.Object

Field Detail

TAG_COMPRESSION_TYPE

TAG_DATA_PRECISION

TAG_IMAGE_HEIGHT

TAG_IMAGE_WIDTH

TAG_NUMBER_OF_COMPONENTS

TAG_COMPONENT_DATA_1

TAG_COMPONENT_DATA_2

TAG_COMPONENT_DATA_3

TAG_COMPONENT_DATA_4

_tagNameMap

Constructor Detail

JpegDirectory

Method Detail

getName

getTagNameMap

getComponent

getImageWidth

getImageHeight

getNumberOfComponents