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Minor performance improvements to HybridBinarizer (#762)

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David Sanders 2017-02-27 11:21:59 -07:00 committed by Sean Owen
parent 6546dc5863
commit 8d12dc4155
1 changed files with 5 additions and 5 deletions
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10
core/src/main/java/com/google/zxing/common/HybridBinarizer.java
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@ -105,20 +105,20 @@ public final class HybridBinarizer extends GlobalHistogramBinarizer {
int height, int height,
int[][] blackPoints, int[][] blackPoints,
BitMatrix matrix) { BitMatrix matrix) {
int maxYOffset = height - BLOCK_SIZE;
int maxXOffset = width - BLOCK_SIZE;
for (int y = 0; y < subHeight; y++) { for (int y = 0; y < subHeight; y++) {
int yoffset = y << BLOCK_SIZE_POWER; int yoffset = y << BLOCK_SIZE_POWER;
int maxYOffset = height - BLOCK_SIZE;
if (yoffset > maxYOffset) { if (yoffset > maxYOffset) {
yoffset = maxYOffset; yoffset = maxYOffset;
} }
int top = cap(y, 2, subHeight - 3);
for (int x = 0; x < subWidth; x++) { for (int x = 0; x < subWidth; x++) {
int xoffset = x << BLOCK_SIZE_POWER; int xoffset = x << BLOCK_SIZE_POWER;
int maxXOffset = width - BLOCK_SIZE;
if (xoffset > maxXOffset) { if (xoffset > maxXOffset) {
xoffset = maxXOffset; xoffset = maxXOffset;
} }
int left = cap(x, 2, subWidth - 3); int left = cap(x, 2, subWidth - 3);
int top = cap(y, 2, subHeight - 3);
int sum = 0; int sum = 0;
for (int z = -2; z <= 2; z++) { for (int z = -2; z <= 2; z++) {
int[] blackRow = blackPoints[top + z]; int[] blackRow = blackPoints[top + z];
@ -163,16 +163,16 @@ public final class HybridBinarizer extends GlobalHistogramBinarizer {
int subHeight, int subHeight,
int width, int width,
int height) { int height) {
int maxYOffset = height - BLOCK_SIZE;
int maxXOffset = width - BLOCK_SIZE;
int[][] blackPoints = new int[subHeight][subWidth]; int[][] blackPoints = new int[subHeight][subWidth];
for (int y = 0; y < subHeight; y++) { for (int y = 0; y < subHeight; y++) {
int yoffset = y << BLOCK_SIZE_POWER; int yoffset = y << BLOCK_SIZE_POWER;
int maxYOffset = height - BLOCK_SIZE;
if (yoffset > maxYOffset) { if (yoffset > maxYOffset) {
yoffset = maxYOffset; yoffset = maxYOffset;
} }
for (int x = 0; x < subWidth; x++) { for (int x = 0; x < subWidth; x++) {
int xoffset = x << BLOCK_SIZE_POWER; int xoffset = x << BLOCK_SIZE_POWER;
int maxXOffset = width - BLOCK_SIZE;
if (xoffset > maxXOffset) { if (xoffset > maxXOffset) {
xoffset = maxXOffset; xoffset = maxXOffset;
} }