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Issue 494 round luminance values rather than truncate

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git-svn-id: https://zxing.googlecode.com/svn/trunk@1558 59b500cc-1b3d-0410-9834-0bbf25fbcc57
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smparkes@smparkes.net 2010-08-25 15:54:19 +00:00
parent e3bd36499c
commit 4836a3e28c
2 changed files with 5 additions and 4 deletions
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6
core/test/src/com/google/zxing/qrcode/QRCodeBlackBox4TestCase.java
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@ -29,10 +29,10 @@ public final class QRCodeBlackBox4TestCase extends AbstractBlackBoxTestCase {
public QRCodeBlackBox4TestCase() { public QRCodeBlackBox4TestCase() {
super("test/data/blackbox/qrcode-4", new MultiFormatReader(), BarcodeFormat.QR_CODE); super("test/data/blackbox/qrcode-4", new MultiFormatReader(), BarcodeFormat.QR_CODE);
addTest(35, 35, 0.0f); addTest(36, 36, 0.0f);
addTest(36, 36, 90.0f); addTest(36, 36, 90.0f);
addTest(34, 34, 180.0f); addTest(35, 35, 180.0f);
addTest(34, 34, 270.0f); addTest(35, 35, 270.0f);
} }
} }

3
javase/src/com/google/zxing/client/j2se/BufferedImageLuminanceSource.java
View file

@ -95,7 +95,8 @@ public final class BufferedImageLuminanceSource extends LuminanceSource {
int pixel = rgb[offset + x]; int pixel = rgb[offset + x];
int luminance = (306 * ((pixel >> 16) & 0xFF) + int luminance = (306 * ((pixel >> 16) & 0xFF) +
601 * ((pixel >> 8) & 0xFF) + 601 * ((pixel >> 8) & 0xFF) +
117 * (pixel & 0xFF)) >> 10; 117 * (pixel & 0xFF) +
(0x200)) >> 10; // 0x200 = 1<<9, half an lsb of the result to force rounding
matrix[offset + x] = (byte) luminance; matrix[offset + x] = (byte) luminance;
} }
} }