ImageInfo (Qoppa jPDFOptimizer API)

```
public interface ImageInfo
```
This class holds information about an image found in the PDF. The host application can look at this image information to determine whether to convert an image, using compression or color space conversion.

Author:

Qoppa Software

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`CO_NAME_ASCII85_DECODE` Compression Name ASCII85Decode.
`static String`	`CO_NAME_ASCIIHEX_DECODE` Compression Name ASCIIHexDecode.
`static String`	`CO_NAME_CCITT_DECODE` Compression Name CCITFaxDecode.
`static String`	`CO_NAME_CRYPT` Compression Name Crypt.
`static String`	`CO_NAME_DCTDECODE` Compression Name DCTDecode (JPEG).
`static String`	`CO_NAME_FLATE_DECODE` Compression Name FlateDecode.
`static String`	`CO_NAME_JBIG2DECODE` Compression Name JBIG2Decode.
`static String`	`CO_NAME_JPXDECODE` Compression Name JPXDecode (JPEG 2000).
`static String`	`CO_NAME_LZW_DECODE` Compression Name LZWDecode.
`static String`	`CO_NAME_RUNLENGTHDECODE` Compression Name RunLengthDecode.
`static String`	`CS_NAME_CALGRAY` Color Space Name CalGray.
`static String`	`CS_NAME_CALRGB` Color Space Name CalRGB.
`static String`	`CS_NAME_DEVICECMYK` Color Space Name DeviceCMYK.
`static String`	`CS_NAME_DEVICEGRAY` Color Space Name DeviceGray.
`static String`	`CS_NAME_DEVICEN` Color Space Name DeviceN.
`static String`	`CS_NAME_DEVICERGB` Color Space Name DeviceRGB.
`static String`	`CS_NAME_ICCBASED` Color Space Name ICCBased.
`static String`	`CS_NAME_INDEXED` Color Space Name Indexed.
`static String`	`CS_NAME_LAB` Color Space Name Lab.
`static String`	`CS_NAME_PATTERN` Color Space Name Pattern.
`static String`	`CS_NAME_SEPARATION` Color Space Name Separation.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`int`	`getBPC()` Returns the bits per component for this image.
`String`	`getColorSpaceName()` Returns the color space of this image, from the PDF format specifications.
`String`	`getCompressionName()` Returns the type of compression used for this image, from the PDF format specifications.
`float`	`getDisplayHeight()` Return the height of this image as it is displayed on the page, in points.
`float`	`getDisplayWidth()` Return the width of this image as it is displayed on the page, in points.
`float`	`getDPIX()` Returns the horizontal image resolution, as displayed on the page, in dots per inch (DPI).
`float`	`getDPIY()` Returns the vertical image resolution, as displayed on the page, in dots per inch (DPI).
`int`	`getImageHeight()` Returns the height of this image, in pixels.
`int`	`getImageWidth()` Returns the width of this image, in pixels.
`boolean`	`isColor()` Returns true if the image is a color image.
`boolean`	`isGray()` Returns true if this image is a gray scale image ((i.e.
`boolean`	`isIndexed()` Returns true if the image uses an indexed color space.
`boolean`	`isMonochrome()` Returns true if this image's pixels are either black or white (1 or 0).

- Field Detail
  - CO_NAME_ASCII85_DECODE
```
static final String CO_NAME_ASCII85_DECODE
```
    Compression Name ASCII85Decode. Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CO_NAME_ASCIIHEX_DECODE
```
static final String CO_NAME_ASCIIHEX_DECODE
```
    Compression Name ASCIIHexDecode. Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CO_NAME_CCITT_DECODE
```
static final String CO_NAME_CCITT_DECODE
```
    Compression Name CCITFaxDecode. Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CO_NAME_CRYPT
```
static final String CO_NAME_CRYPT
```
    Compression Name Crypt. Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CO_NAME_DCTDECODE
```
static final String CO_NAME_DCTDECODE
```
    Compression Name DCTDecode (JPEG). Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CO_NAME_FLATE_DECODE
```
static final String CO_NAME_FLATE_DECODE
```
    Compression Name FlateDecode. Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CO_NAME_JBIG2DECODE
```
static final String CO_NAME_JBIG2DECODE
```
    Compression Name JBIG2Decode. Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CO_NAME_JPXDECODE
```
static final String CO_NAME_JPXDECODE
```
    Compression Name JPXDecode (JPEG 2000). Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CO_NAME_LZW_DECODE
```
static final String CO_NAME_LZW_DECODE
```
    Compression Name LZWDecode. Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CO_NAME_RUNLENGTHDECODE
```
static final String CO_NAME_RUNLENGTHDECODE
```
    Compression Name RunLengthDecode. Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CS_NAME_CALGRAY
```
static final String CS_NAME_CALGRAY
```
    Color Space Name CalGray. Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CS_NAME_CALRGB
```
static final String CS_NAME_CALRGB
```
    Color Space Name CalRGB. Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CS_NAME_DEVICECMYK
```
static final String CS_NAME_DEVICECMYK
```
    Color Space Name DeviceCMYK. Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CS_NAME_DEVICEGRAY
```
static final String CS_NAME_DEVICEGRAY
```
    Color Space Name DeviceGray. Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CS_NAME_DEVICERGB
```
static final String CS_NAME_DEVICERGB
```
    Color Space Name DeviceRGB. Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CS_NAME_ICCBASED
```
static final String CS_NAME_ICCBASED
```
    Color Space Name ICCBased. Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CS_NAME_INDEXED
```
static final String CS_NAME_INDEXED
```
    Color Space Name Indexed. Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CS_NAME_LAB
```
static final String CS_NAME_LAB
```
    Color Space Name Lab. Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CS_NAME_PATTERN
```
static final String CS_NAME_PATTERN
```
    Color Space Name Pattern. Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CS_NAME_SEPARATION
```
static final String CS_NAME_SEPARATION
```
    Color Space Name Separation. Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
  - CS_NAME_DEVICEN
```
static final String CS_NAME_DEVICEN
```
    Color Space Name DeviceN. Capitalization is not always correct, use case insensitive comparison.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - isColor
```
boolean isColor()
```
    Returns true if the image is a color image.
    
    Returns:
    
    true if the image is not grayscale.
  - isIndexed
```
boolean isIndexed()
```
    Returns true if the image uses an indexed color space.
    
    Returns:
    
    true if the image is an indexed color image.
  - isGray
```
boolean isGray()
```
    Returns true if this image is a gray scale image ((i.e. color space name DeviceGray or CalGray)) and pixels use more than 1 bit per pixel.
    
    Returns:
    
    true if the image is gray scale
  - isMonochrome
```
boolean isMonochrome()
```
    Returns true if this image's pixels are either black or white (1 or 0). For this to be true, the image has to be grayscale (i.e. color space name DeviceGray or CalGray) and use only 1 bit per pixel.
    
    Returns:
    
    true if the image is black and white.
  - getCompressionName
```
String getCompressionName()
```
    Returns the type of compression used for this image, from the PDF format specifications. The possible values for this field are ASCII85Decode, ASCIIHexDecode, CCITTFaxDecode, Crypt, DCTDecode (JPEG) , JBig2Decode, JPXDecode (JPEG200), LZWDecode, RunLengthDecode. Capitalization is not always correct in PDF documents, use case insensitive comparison.
    
    Returns:
    
    the name of the compression scheme used for this image.
  - getColorSpaceName
```
String getColorSpaceName()
```
    Returns the color space of this image, from the PDF format specifications. The possible values for this field are CalGray, CalRGB, DeviceCMYK, DeviceGray, DeviceN, DeviceRGB, ICCBased, Indexed, Lab, Patter, Separation. Capitalization is not always correct, use case insensitive comparison.
  - getImageWidth
```
int getImageWidth()
```
    Returns the width of this image, in pixels.
    
    Returns:
    
    The image width.
  - getImageHeight
```
int getImageHeight()
```
    Returns the height of this image, in pixels.
    
    Returns:
    
    The image height.
  - getBPC
```
int getBPC()
```
    Returns the bits per component for this image.
    
    Returns:
    
    Bits per component.
  - getDisplayWidth
```
float getDisplayWidth()
```
    Return the width of this image as it is displayed on the page, in points. Points are defined to be 72 DPI (i.e. 72 points == 1 inch).
    
    Returns:
    
    The display width.
  - getDisplayHeight
```
float getDisplayHeight()
```
    Return the height of this image as it is displayed on the page, in points. Points are defined to be 72 DPI (i.e. 72 points == 1 inch).
    
    Returns:
    
    The display height.
  - getDPIX
```
float getDPIX()
```
    Returns the horizontal image resolution, as displayed on the page, in dots per inch (DPI). The horizontal resolution is defined as the number of pixels in the image divided by the display width.
    
    Returns:
    
    the horizontal DPI.
  - getDPIY
```
float getDPIY()
```
    Returns the vertical image resolution, as displayed on the page, in dots per inch (DPI). The vertical resolution is defined as the number of pixels in the image divided by the display height.
    
    Returns:
    
    the horizontal DPI.

Interface ImageInfo

Field Summary

Method Summary

Field Detail

CO_NAME_ASCII85_DECODE

CO_NAME_ASCIIHEX_DECODE

CO_NAME_CCITT_DECODE

CO_NAME_CRYPT

CO_NAME_DCTDECODE

CO_NAME_FLATE_DECODE

CO_NAME_JBIG2DECODE

CO_NAME_JPXDECODE

CO_NAME_LZW_DECODE

CO_NAME_RUNLENGTHDECODE

CS_NAME_CALGRAY

CS_NAME_CALRGB

CS_NAME_DEVICECMYK

CS_NAME_DEVICEGRAY

CS_NAME_DEVICERGB

CS_NAME_ICCBASED

CS_NAME_INDEXED

CS_NAME_LAB

CS_NAME_PATTERN

CS_NAME_SEPARATION

CS_NAME_DEVICEN

Method Detail

isColor

isIndexed

isGray

isMonochrome

getCompressionName

getColorSpaceName

getImageWidth

getImageHeight

getBPC

getDisplayWidth

getDisplayHeight

getDPIX

getDPIY