Class MaskUtil

java.lang.Object

com.itextpdf.barcodes.qrcode.MaskUtil

final class MaskUtil
extends Object

Constructor Summary

Constructors

Modifier	Constructor	Description
private	MaskUtil()

Method Summary

Modifier and Type	Method	Description
static int	applyMaskPenaltyRule1(ByteMatrix matrix)	Apply mask penalty rule 1 and return the penalty.
private static int	applyMaskPenaltyRule1Internal(ByteMatrix matrix, boolean isHorizontal)
static int	applyMaskPenaltyRule2(ByteMatrix matrix)	Apply mask penalty rule 2 and return the penalty.
static int	applyMaskPenaltyRule3(ByteMatrix matrix)	Apply mask penalty rule 3 and return the penalty.
static int	applyMaskPenaltyRule4(ByteMatrix matrix)	Apply mask penalty rule 4 and return the penalty.
static boolean	getDataMaskBit(int maskPattern, int x, int y)	Return the mask bit for "getMaskPattern" at "x" and "y".

Methods inherited from class Object

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

Constructor Details

MaskUtil

private MaskUtil()

Method Details

applyMaskPenaltyRule1

public static int applyMaskPenaltyRule1(ByteMatrix matrix)

Apply mask penalty rule 1 and return the penalty. Find repetitive cells with the same color and give penalty to them. Example: 00000 or 11111.

Parameters:

matrix - ByteMatrix to apply the penalty rule to

Returns:

the rule 1 penalty

applyMaskPenaltyRule2

public static int applyMaskPenaltyRule2(ByteMatrix matrix)

Apply mask penalty rule 2 and return the penalty. Find 2x2 blocks with the same color and give penalty to them.

Parameters:

matrix - ByteMatrix to apply the penalty rule to

Returns:

the rule 2 penalty

applyMaskPenaltyRule3

public static int applyMaskPenaltyRule3(ByteMatrix matrix)

Apply mask penalty rule 3 and return the penalty. Find consecutive cells of 00001011101 or 10111010000, and give penalty to them. If we find patterns like 000010111010000, we give penalties twice (i.e. 40 * 2).

Parameters:

matrix - ByteMatrix to apply the penalty rule to

Returns:

the rule 3 penalty

applyMaskPenaltyRule4

public static int applyMaskPenaltyRule4(ByteMatrix matrix)

Apply mask penalty rule 4 and return the penalty. Calculate the ratio of dark cells and give penalty if the ratio is far from 50%. It gives 10 penalty for 5% distance. Examples: - 0% => 100 - 40% => 20 - 45% => 10 - 50% => 0 - 55% => 10 - 55% => 20 - 100% => 100

Parameters:

matrix - Bytematrix to apply the rule to

Returns:

the rule 4 penalty

getDataMaskBit

public static boolean getDataMaskBit(int maskPattern,
 int x,
 int y)

Return the mask bit for "getMaskPattern" at "x" and "y". See 8.8 of JISX0510:2004 for mask pattern conditions.

Parameters:

maskPattern - masking pattern to use

x - width coordiante

y - height-coordinate

Returns:

the mask bit at that position

applyMaskPenaltyRule1Internal

private static int applyMaskPenaltyRule1Internal(ByteMatrix matrix,
 boolean isHorizontal)