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MonochromeBitmapSource
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SUMMARY: NESTED | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD>
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DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD>
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com.google.zxing</FONT>
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<BR>
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Interface MonochromeBitmapSource</H2>
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<DL>
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<DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../com/google/zxing/client/bug/AWTImageMonochromeBitmapSource.html" title="class in com.google.zxing.client.bug">AWTImageMonochromeBitmapSource</A>, <A HREF="../../../com/google/zxing/common/BaseMonochromeBitmapSource.html" title="class in com.google.zxing.common">BaseMonochromeBitmapSource</A>, <A HREF="../../../com/google/zxing/client/j2se/BufferedImageMonochromeBitmapSource.html" title="class in com.google.zxing.client.j2se">BufferedImageMonochromeBitmapSource</A>, <A HREF="../../../com/google/zxing/common/CroppedMonochromeBitmapSource.html" title="class in com.google.zxing.common">CroppedMonochromeBitmapSource</A>, <A HREF="../../../com/google/zxing/client/j2me/LCDUIImageMonochromeBitmapSource.html" title="class in com.google.zxing.client.j2me">LCDUIImageMonochromeBitmapSource</A>, <A HREF="../../../com/google/zxing/client/android/YUVMonochromeBitmapSource.html" title="class in com.google.zxing.client.android">YUVMonochromeBitmapSource</A></DD>
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</DL>
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<DL>
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<DT><PRE>public interface <B>MonochromeBitmapSource</B></DL>
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</PRE>
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<P>
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<p>Encapsulates a generic black-and-white bitmap -- a collection of pixels in two dimensions.
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This unifies many possible representations, like AWT's <code>BufferedImage</code>.</p>
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<P>
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<P>
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<DL>
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<DT><B>Author:</B></DT>
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<DD>Sean Owen, dswitkin@google.com (Daniel Switkin)</DD>
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</DL>
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<!-- ========== METHOD SUMMARY =========== -->
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<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
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<B>Method Summary</B></FONT></TH>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> void</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/google/zxing/MonochromeBitmapSource.html#estimateBlackPoint(com.google.zxing.BlackPointEstimationMethod, int)">estimateBlackPoint</A></B>(<A HREF="../../../com/google/zxing/BlackPointEstimationMethod.html" title="class in com.google.zxing">BlackPointEstimationMethod</A> method,
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int argument)</CODE>
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<BR>
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Estimates black point according to the given method, which is optionally parameterized by
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a single int argument.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> <A HREF="../../../com/google/zxing/common/BitArray.html" title="class in com.google.zxing.common">BitArray</A></CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/google/zxing/MonochromeBitmapSource.html#getBlackColumn(int, com.google.zxing.common.BitArray, int, int)">getBlackColumn</A></B>(int x,
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<A HREF="../../../com/google/zxing/common/BitArray.html" title="class in com.google.zxing.common">BitArray</A> column,
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int startY,
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int getHeight)</CODE>
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<BR>
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Entirely analogous to <A HREF="../../../com/google/zxing/MonochromeBitmapSource.html#getBlackRow(int, com.google.zxing.common.BitArray, int, int)"><CODE>getBlackRow(int, BitArray, int, int)</CODE></A> but gets a column.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> <A HREF="../../../com/google/zxing/common/BitArray.html" title="class in com.google.zxing.common">BitArray</A></CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/google/zxing/MonochromeBitmapSource.html#getBlackDiagonal(int, int, int, int, com.google.zxing.common.BitArray, int)">getBlackDiagonal</A></B>(int x,
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int y,
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int dx,
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int dy,
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<A HREF="../../../com/google/zxing/common/BitArray.html" title="class in com.google.zxing.common">BitArray</A> diagonal,
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int size)</CODE>
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<BR>
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</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> <A HREF="../../../com/google/zxing/common/BitArray.html" title="class in com.google.zxing.common">BitArray</A></CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/google/zxing/MonochromeBitmapSource.html#getBlackRow(int, com.google.zxing.common.BitArray, int, int)">getBlackRow</A></B>(int y,
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<A HREF="../../../com/google/zxing/common/BitArray.html" title="class in com.google.zxing.common">BitArray</A> row,
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int startX,
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int getWidth)</CODE>
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<BR>
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Returns an entire row of black/white pixels as an array of bits, where "true" means "black".</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> int</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/google/zxing/MonochromeBitmapSource.html#getHeight()">getHeight</A></B>()</CODE>
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<BR>
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</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> <A HREF="../../../com/google/zxing/BlackPointEstimationMethod.html" title="class in com.google.zxing">BlackPointEstimationMethod</A></CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/google/zxing/MonochromeBitmapSource.html#getLastEstimationMethod()">getLastEstimationMethod</A></B>()</CODE>
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<BR>
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</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> int</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/google/zxing/MonochromeBitmapSource.html#getLuminance(int, int)">getLuminance</A></B>(int x,
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int y)</CODE>
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<BR>
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Retrieves the luminance at the pixel x,y in the bitmap.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> int[]</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/google/zxing/MonochromeBitmapSource.html#getLuminanceColumn(int, int[])">getLuminanceColumn</A></B>(int x,
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int[] column)</CODE>
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<BR>
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The same as getLuminanceRow(), but for columns.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> int[]</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/google/zxing/MonochromeBitmapSource.html#getLuminanceRow(int, int[])">getLuminanceRow</A></B>(int y,
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int[] row)</CODE>
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<BR>
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This is the main mechanism for retrieving luminance data.</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> int</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/google/zxing/MonochromeBitmapSource.html#getWidth()">getWidth</A></B>()</CODE>
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<BR>
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</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> boolean</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/google/zxing/MonochromeBitmapSource.html#isBlack(int, int)">isBlack</A></B>(int x,
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int y)</CODE>
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<BR>
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</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> boolean</CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/google/zxing/MonochromeBitmapSource.html#isRotateSupported()">isRotateSupported</A></B>()</CODE>
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<BR>
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</TD>
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</TR>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
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<CODE> <A HREF="../../../com/google/zxing/MonochromeBitmapSource.html" title="interface in com.google.zxing">MonochromeBitmapSource</A></CODE></FONT></TD>
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<TD><CODE><B><A HREF="../../../com/google/zxing/MonochromeBitmapSource.html#rotateCounterClockwise()">rotateCounterClockwise</A></B>()</CODE>
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<BR>
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Optional operation which returns an implementation based on the same underlying
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image, but which behaves as if the underlying image had been rotated 90 degrees
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counterclockwise.</TD>
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</TR>
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</TABLE>
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<P>
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<!-- ============ METHOD DETAIL ========== -->
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<A NAME="method_detail"><!-- --></A>
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
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<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
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<B>Method Detail</B></FONT></TH>
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</TR>
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</TABLE>
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<A NAME="isBlack(int, int)"><!-- --></A><H3>
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isBlack</H3>
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<PRE>
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boolean <B>isBlack</B>(int x,
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int y)</PRE>
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<DL>
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<DD><DL>
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<DT><B>Parameters:</B><DD><CODE>x</CODE> - horizontal offset, from left, of the pixel<DD><CODE>y</CODE> - vertical offset, from top, of the pixel
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<DT><B>Returns:</B><DD>true iff the pixel at (x,y) is black</DL>
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</DD>
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</DL>
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<HR>
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<A NAME="getBlackRow(int, com.google.zxing.common.BitArray, int, int)"><!-- --></A><H3>
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getBlackRow</H3>
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<PRE>
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<A HREF="../../../com/google/zxing/common/BitArray.html" title="class in com.google.zxing.common">BitArray</A> <B>getBlackRow</B>(int y,
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<A HREF="../../../com/google/zxing/common/BitArray.html" title="class in com.google.zxing.common">BitArray</A> row,
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int startX,
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int getWidth)</PRE>
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<DL>
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<DD><p>Returns an entire row of black/white pixels as an array of bits, where "true" means "black".
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This is a sort of "bulk get" operation intended to enable efficient access in
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certain situations.</p>
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<P>
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<DD><DL>
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<DT><B>Parameters:</B><DD><CODE>y</CODE> - vertical offset, from top, of the row of pixels<DD><CODE>row</CODE> - if not null, <A HREF="../../../com/google/zxing/common/BitArray.html" title="class in com.google.zxing.common"><CODE>BitArray</CODE></A> to write pixels into. If null, a new <A HREF="../../../com/google/zxing/common/BitArray.html" title="class in com.google.zxing.common"><CODE>BitArray</CODE></A>
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is allocated and returned.<DD><CODE>startX</CODE> - horizontal offset, from left, from which to start getting pixels<DD><CODE>getWidth</CODE> - number of pixels to get from the row
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<DT><B>Returns:</B><DD><A HREF="../../../com/google/zxing/common/BitArray.html" title="class in com.google.zxing.common"><CODE>BitArray</CODE></A> representing the (subset of the) row of pixels. If row parameter
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was not null, it is returned.</DL>
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</DD>
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</DL>
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<HR>
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<A NAME="getBlackColumn(int, com.google.zxing.common.BitArray, int, int)"><!-- --></A><H3>
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getBlackColumn</H3>
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<PRE>
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<A HREF="../../../com/google/zxing/common/BitArray.html" title="class in com.google.zxing.common">BitArray</A> <B>getBlackColumn</B>(int x,
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<A HREF="../../../com/google/zxing/common/BitArray.html" title="class in com.google.zxing.common">BitArray</A> column,
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int startY,
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int getHeight)</PRE>
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<DL>
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<DD>Entirely analogous to <A HREF="../../../com/google/zxing/MonochromeBitmapSource.html#getBlackRow(int, com.google.zxing.common.BitArray, int, int)"><CODE>getBlackRow(int, BitArray, int, int)</CODE></A> but gets a column.
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<P>
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<DD><DL>
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</DL>
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</DD>
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</DL>
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<HR>
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<A NAME="getBlackDiagonal(int, int, int, int, com.google.zxing.common.BitArray, int)"><!-- --></A><H3>
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getBlackDiagonal</H3>
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<PRE>
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<A HREF="../../../com/google/zxing/common/BitArray.html" title="class in com.google.zxing.common">BitArray</A> <B>getBlackDiagonal</B>(int x,
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int y,
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int dx,
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int dy,
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<A HREF="../../../com/google/zxing/common/BitArray.html" title="class in com.google.zxing.common">BitArray</A> diagonal,
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int size)</PRE>
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<DL>
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<DD><DL>
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</DL>
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</DD>
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</DL>
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<HR>
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<A NAME="getHeight()"><!-- --></A><H3>
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getHeight</H3>
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<PRE>
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int <B>getHeight</B>()</PRE>
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<DL>
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<DD><DL>
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<DT><B>Returns:</B><DD>height of underlying image</DL>
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</DD>
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</DL>
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<HR>
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<A NAME="getWidth()"><!-- --></A><H3>
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getWidth</H3>
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<PRE>
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int <B>getWidth</B>()</PRE>
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<DL>
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<DD><DL>
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<DT><B>Returns:</B><DD>width of underlying image</DL>
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</DD>
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</DL>
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<HR>
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<A NAME="estimateBlackPoint(com.google.zxing.BlackPointEstimationMethod, int)"><!-- --></A><H3>
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estimateBlackPoint</H3>
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<PRE>
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void <B>estimateBlackPoint</B>(<A HREF="../../../com/google/zxing/BlackPointEstimationMethod.html" title="class in com.google.zxing">BlackPointEstimationMethod</A> method,
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int argument)
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throws <A HREF="../../../com/google/zxing/ReaderException.html" title="class in com.google.zxing">ReaderException</A></PRE>
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<DL>
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<DD><p>Estimates black point according to the given method, which is optionally parameterized by
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a single int argument. For <A HREF="../../../com/google/zxing/BlackPointEstimationMethod.html#ROW_SAMPLING"><CODE>BlackPointEstimationMethod.ROW_SAMPLING</CODE></A>, this
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specifies the row to sample.</p>
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<p>The estimated value will be used in subsequent computations that rely on an estimated black
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point.</p>
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<P>
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<DD><DL>
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<DT><B>Parameters:</B><DD><CODE>method</CODE> - black point estimation method<DD><CODE>argument</CODE> - method-specific argument
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<DT><B>Throws:</B>
|
|
<DD><CODE><A HREF="../../../com/google/zxing/ReaderException.html" title="class in com.google.zxing">ReaderException</A></CODE></DL>
|
|
</DD>
|
|
</DL>
|
|
<HR>
|
|
|
|
<A NAME="getLastEstimationMethod()"><!-- --></A><H3>
|
|
getLastEstimationMethod</H3>
|
|
<PRE>
|
|
<A HREF="../../../com/google/zxing/BlackPointEstimationMethod.html" title="class in com.google.zxing">BlackPointEstimationMethod</A> <B>getLastEstimationMethod</B>()</PRE>
|
|
<DL>
|
|
<DD><DL>
|
|
|
|
<DT><B>Returns:</B><DD><A HREF="../../../com/google/zxing/BlackPointEstimationMethod.html" title="class in com.google.zxing"><CODE>BlackPointEstimationMethod</CODE></A> representing last sampling method used</DL>
|
|
</DD>
|
|
</DL>
|
|
<HR>
|
|
|
|
<A NAME="rotateCounterClockwise()"><!-- --></A><H3>
|
|
rotateCounterClockwise</H3>
|
|
<PRE>
|
|
<A HREF="../../../com/google/zxing/MonochromeBitmapSource.html" title="interface in com.google.zxing">MonochromeBitmapSource</A> <B>rotateCounterClockwise</B>()</PRE>
|
|
<DL>
|
|
<DD><p>Optional operation which returns an implementation based on the same underlying
|
|
image, but which behaves as if the underlying image had been rotated 90 degrees
|
|
counterclockwise. This is useful in the context of 1D barcodes and the
|
|
<A HREF="../../../com/google/zxing/DecodeHintType.html#TRY_HARDER"><CODE>DecodeHintType.TRY_HARDER</CODE></A> decode hint, and is only intended to be
|
|
used in non-resource-constrained environments. Hence, implementations
|
|
of this class which are only used in resource-constrained mobile environments
|
|
don't have a need to implement this.</p>
|
|
<P>
|
|
<DD><DL>
|
|
|
|
<DT><B>Throws:</B>
|
|
<DD><CODE>java.lang.IllegalArgumentException</CODE> - if not supported</DL>
|
|
</DD>
|
|
</DL>
|
|
<HR>
|
|
|
|
<A NAME="isRotateSupported()"><!-- --></A><H3>
|
|
isRotateSupported</H3>
|
|
<PRE>
|
|
boolean <B>isRotateSupported</B>()</PRE>
|
|
<DL>
|
|
<DD><DL>
|
|
|
|
<DT><B>Returns:</B><DD>true iff rotation is supported<DT><B>See Also:</B><DD><A HREF="../../../com/google/zxing/MonochromeBitmapSource.html#rotateCounterClockwise()"><CODE>rotateCounterClockwise()</CODE></A></DL>
|
|
</DD>
|
|
</DL>
|
|
<HR>
|
|
|
|
<A NAME="getLuminance(int, int)"><!-- --></A><H3>
|
|
getLuminance</H3>
|
|
<PRE>
|
|
int <B>getLuminance</B>(int x,
|
|
int y)</PRE>
|
|
<DL>
|
|
<DD>Retrieves the luminance at the pixel x,y in the bitmap. This method is only used for estimating
|
|
the black point and implementing getBlackRow() - it is not meant for decoding, hence it is not
|
|
part of MonochromeBitmapSource itself, and is protected.
|
|
<P>
|
|
<DD><DL>
|
|
<DT><B>Parameters:</B><DD><CODE>x</CODE> - The x coordinate in the image.<DD><CODE>y</CODE> - The y coordinate in the image.
|
|
<DT><B>Returns:</B><DD>The luminance value between 0 and 255.</DL>
|
|
</DD>
|
|
</DL>
|
|
<HR>
|
|
|
|
<A NAME="getLuminanceRow(int, int[])"><!-- --></A><H3>
|
|
getLuminanceRow</H3>
|
|
<PRE>
|
|
int[] <B>getLuminanceRow</B>(int y,
|
|
int[] row)</PRE>
|
|
<DL>
|
|
<DD>This is the main mechanism for retrieving luminance data. It is dramatically more efficient
|
|
than repeatedly calling getLuminance(). As above, this is not meant for decoders.
|
|
<P>
|
|
<DD><DL>
|
|
<DT><B>Parameters:</B><DD><CODE>y</CODE> - The row to fetch<DD><CODE>row</CODE> - The array to write luminance values into. It is <b>strongly</b> suggested that you
|
|
allocate this yourself, making sure row.length >= getWidth(), and reuse the same
|
|
array on subsequent calls for performance. If you pass null, you will be flogged,
|
|
but then I will take pity on you and allocate a sufficient array internally.
|
|
<DT><B>Returns:</B><DD>The array containing the luminance data. This is the same as row if it was usable.</DL>
|
|
</DD>
|
|
</DL>
|
|
<HR>
|
|
|
|
<A NAME="getLuminanceColumn(int, int[])"><!-- --></A><H3>
|
|
getLuminanceColumn</H3>
|
|
<PRE>
|
|
int[] <B>getLuminanceColumn</B>(int x,
|
|
int[] column)</PRE>
|
|
<DL>
|
|
<DD>The same as getLuminanceRow(), but for columns.
|
|
<P>
|
|
<DD><DL>
|
|
<DT><B>Parameters:</B><DD><CODE>x</CODE> - The column to fetch<DD><CODE>column</CODE> - The array to write luminance values into. See above.
|
|
<DT><B>Returns:</B><DD>The array containing the luminance data.</DL>
|
|
</DD>
|
|
</DL>
|
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