Class TiffRasterData
- java.lang.Object
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- org.apache.commons.imaging.formats.tiff.TiffRasterData
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- Direct Known Subclasses:
TiffRasterDataFloat
,TiffRasterDataInt
public abstract class TiffRasterData extends Object
Provides a simple container for numeric-raster data. Some TIFF files are used to store floating-point or integer data rather than images. This class is intended to support access to those TIFF files.Note: The getData() and getIntData() methods can return direct references to the internal arrays stored in instances of this class. Because these are not safe copies of the data, an application that modified the arrays returned by these methods will change the content of the associated instance. This approach is used for purposes of efficiency when dealing with very large TIFF images.
Data layout: The elements in the returned array are stored in row-major order. In cases where the data contains multiple samples per raster cell (pixel), the data is organized into blocks of data one sample at a time. The first block contains width*height values for the first sample for each cell, the second block contains width*height values for the second sample for each cell, etc. Thus, the array index for a particular value is computed as
index = y*width + x + iSample * width *height;
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Field Summary
Fields Modifier and Type Field Description protected int
height
protected int
nCells
protected int
planarOffset
protected int
samplesPerPixel
protected int
width
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Constructor Summary
Constructors Constructor Description TiffRasterData(int width, int height, int samplesPerPixel)
Construct an instance allocating memory for the specified dimensions.
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description protected int
checkCoordinatesAndComputeIndex(int x, int y, int i)
abstract float[]
getData()
Returns the content stored as an array in this instance.abstract TiffRasterDataType
getDataType()
Gets the raster data type from the instance.int
getHeight()
Gets the height (number of rows) of the raster.abstract int[]
getIntData()
Returns the content stored as an array in this instance.abstract int
getIntValue(int x, int y)
Gets the value stored at the specified raster coordinates.abstract int
getIntValue(int x, int y, int i)
Gets the value stored at the specified raster coordinates.int
getSamplesPerPixel()
Gets the number of samples per pixel.abstract TiffRasterStatistics
getSimpleStatistics()
Tabulates simple statistics for the raster and returns an instance containing general metadata.abstract TiffRasterStatistics
getSimpleStatistics(float valueToExclude)
Tabulates simple statistics for the raster excluding the specified value and returns an instance containing general metadata.abstract float
getValue(int x, int y)
Gets the value stored at the specified raster coordinates.abstract float
getValue(int x, int y, int i)
Gets the value stored at the specified raster coordinates.int
getWidth()
Gets the width (number of columns) of the raster.abstract void
setIntValue(int x, int y, int value)
Sets the value stored at the specified raster coordinates.abstract void
setIntValue(int x, int y, int i, int value)
Sets the value stored at the specified raster coordinates.abstract void
setValue(int x, int y, float value)
Sets the value stored at the specified raster coordinates.abstract void
setValue(int x, int y, int i, float value)
Sets the value stored at the specified raster coordinates.
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Method Detail
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checkCoordinatesAndComputeIndex
protected final int checkCoordinatesAndComputeIndex(int x, int y, int i)
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getWidth
public final int getWidth()
Gets the width (number of columns) of the raster.- Returns:
- the width of the raster
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getHeight
public final int getHeight()
Gets the height (number of rows) of the raster.- Returns:
- the height of the raster.
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getSamplesPerPixel
public final int getSamplesPerPixel()
Gets the number of samples per pixel.- Returns:
- a value of 1 or greater.
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getDataType
public abstract TiffRasterDataType getDataType()
Gets the raster data type from the instance.- Returns:
- a valid enumeration value.
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setValue
public abstract void setValue(int x, int y, float value)
Sets the value stored at the specified raster coordinates.- Parameters:
x
- integer coordinate in the columnar directiony
- integer coordinate in the row directionvalue
- the value to be stored at the specified location; potentially a Float.NaN.
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setValue
public abstract void setValue(int x, int y, int i, float value)
Sets the value stored at the specified raster coordinates.- Parameters:
x
- integer coordinate in the columnar directiony
- integer coordinate in the row directioni
- integer sample index (for data sets giving multiple samples per raster cell).value
- the value to be stored at the specified location; potentially a Float.NaN.
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getValue
public abstract float getValue(int x, int y)
Gets the value stored at the specified raster coordinates.- Parameters:
x
- integer coordinate in the columnar directiony
- integer coordinate in the row direction- Returns:
- the value stored at the specified location; potentially a Float.NaN.
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getValue
public abstract float getValue(int x, int y, int i)
Gets the value stored at the specified raster coordinates.- Parameters:
x
- integer coordinate in the columnar directiony
- integer coordinate in the row directioni
- integer sample index- Returns:
- the value stored at the specified location; potentially a Float.NaN.
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setIntValue
public abstract void setIntValue(int x, int y, int value)
Sets the value stored at the specified raster coordinates.- Parameters:
x
- integer coordinate in the columnar directiony
- integer coordinate in the row directionvalue
- the value to be stored at the specified location.
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setIntValue
public abstract void setIntValue(int x, int y, int i, int value)
Sets the value stored at the specified raster coordinates.- Parameters:
x
- integer coordinate in the columnar directiony
- integer coordinate in the row directioni
- integer sample index (for data sets giving multiple samples per raster cell).value
- the value to be stored at the specified location.
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getIntValue
public abstract int getIntValue(int x, int y)
Gets the value stored at the specified raster coordinates.- Parameters:
x
- integer coordinate in the columnar directiony
- integer coordinate in the row direction- Returns:
- the value stored at the specified location
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getIntValue
public abstract int getIntValue(int x, int y, int i)
Gets the value stored at the specified raster coordinates.- Parameters:
x
- integer coordinate in the columnar directiony
- integer coordinate in the row directioni
- integer sample index (for data sets giving multiple samples per raster cell).- Returns:
- the value stored at the specified location
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getSimpleStatistics
public abstract TiffRasterStatistics getSimpleStatistics()
Tabulates simple statistics for the raster and returns an instance containing general metadata.- Returns:
- a valid instance containing a safe copy of the current simple statistics for the raster.
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getSimpleStatistics
public abstract TiffRasterStatistics getSimpleStatistics(float valueToExclude)
Tabulates simple statistics for the raster excluding the specified value and returns an instance containing general metadata.- Parameters:
valueToExclude
- exclude samples with this specified value.- Returns:
- a valid instance.
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getData
public abstract float[] getData()
Returns the content stored as an array in this instance. Note that in many cases, the returned array is not a safe copy of the data but a direct reference to the member element. In such cases, modifying it would directly affect the content of the instance. While this design approach carries some risk in terms of data security, it was chosen for reasons of performance and memory conservation. TIFF images that contain floating-point data are often quite large. Sizes of 100 million raster cells are common. Making a redundant copy of such a large in-memory object might exceed the resources available to a Java application.See the class API documentation above for notes on accessing array elements.
- Returns:
- the data content stored in this instance.
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getIntData
public abstract int[] getIntData()
Returns the content stored as an array in this instance. Note that in many cases, the returned array is not a safe copy of the data but a direct reference to the member element. In such cases, modifying it would directly affect the content of the instance. While this design approach carries some risk in terms of data security, it was chosen for reasons of performance and memory conservation. TIFF images that contain floating-point data are often quite large. Sizes of 100 million raster cells are common. Making a redundant copy of such a large in-memory object might exceed the resources available to a Java application.See the class API documentation above for notes on accessing array elements.
- Returns:
- the data content stored in this instance.
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