cz.cuni.jagrlib.iface
Interface BlockQuantizer

All Superinterfaces:

PersistentParamsBinary, Property

All Known Implementing Classes:

DefaultBlockQuantizer, JPEGQuantizer

public interface BlockQuantizer
extends Property, PersistentParamsBinary

Quantization of block discrete data.

Since:

0.24

See Also:

BlockQuantizer.java

Field Summary

Fields inherited from interface cz.cuni.jagrlib.iface.Property

LOGGING, STATISTICS, TEXT_DESCRIPTION

Method Summary

int	dequantize(int[] quant, double[] coef) Dequantization = reconstruction (floating-point form).
int	dequantize(int[] quant, int[] coef) Dequantization = reconstruction (integer form).
int	quantize(double[] coef, int[] quant) Quantization (floating-point form).
int	quantize(int[] coef, int[] quant) Quantization (integer form).
void	setBlockSize(int width, int height) Sets actual block size.
void	setData(int[] qtable) Sets quantization table for the current variant.
void	setQuality(float quality) Sets actual quality coefficient.
int	setVariant(int variant) Set actual quantizer variant (context).

Methods inherited from interface cz.cuni.jagrlib.iface.Property

commit, get, set

Methods inherited from interface cz.cuni.jagrlib.iface.PersistentParamsBinary

loadData, storeData

Method Detail

setVariant

int setVariant(int variant)

Set actual quantizer variant (context).

Parameters:

variant - Variant number (from 0).

Returns:

Old variant number.

See Also:

setBlockSize(int, int), setQuality(float), setData(int[])

setBlockSize

void setBlockSize(int width,
                  int height)

Sets actual block size. Can be used both for 1D and 2D quantization.

Parameters:

width - Horizontal block size (1D block size).

height - Vertical block size (1 for 1D).

See Also:

setVariant(int), setQuality(float), setData(int[])

setQuality

void setQuality(float quality)

Sets actual quality coefficient. Value range for the quality: 0.0f to 1.0f.

Parameters:

quality - New quality coefficient.

See Also:

setVariant(int), setBlockSize(int, int), setData(int[])

setData

void setData(int[] qtable)

Sets quantization table for the current variant.

Parameters:

qtable - New quantization table. Should have the correct size and layout (scanline top-first, left-first).

See Also:

setVariant(int), setQuality(float), setBlockSize(int, int)

quantize

int quantize(double[] coef,
             int[] quant)

Quantization (floating-point form).

Parameters:

coef - Source data (coefficients). Size = array size. Should have the correct size and layout (scanline top-first, left-first).

quant - Pre-allocated result array or null if it's size needs to be determined.

Returns:

Result array size (even if the quantization was not performed).

See Also:

quantize(int[],int[]), dequantize(int[],double[])

quantize

int quantize(int[] coef,
             int[] quant)

Quantization (integer form).

Parameters:

coef - Source data (coefficients). Size = array size. Should have the correct size and layout (scanline top-first, left-first).

quant - Pre-allocated result array or null if it's size needs to be determined.

Returns:

Result array size (even if the quantization was not performed).

See Also:

quantize(double[],int[]), dequantize(int[],int[])

dequantize

int dequantize(int[] quant,
               double[] coef)

Dequantization = reconstruction (floating-point form).

Parameters:

quant - Source data (quantized coefficients). Size = array size. Should have the correct size and layout (scanline top-first, left-first).

coef - Pre-allocated coefficient array or null if it's size needs to be determined.

Returns:

Coefficient array size (even if the dequantization was not performed).

See Also:

dequantize(int[],int[]), quantize(double[],int[])

dequantize

int dequantize(int[] quant,
               int[] coef)

Dequantization = reconstruction (integer form).

Parameters:

quant - Source data (quantized coefficients). Size = array size. Should have the correct size and layout (scanline top-first, left-first).

coef - Pre-allocated coefficient array or null if it's size needs to be determined.

Returns:

Coefficient array size (even if the dequantization was not performed).

See Also:

dequantize(int[],double[]), quantize(int[],int[])