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Merge pull request #176 from nicolashenry/fix-math-floor

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Performance: remove useless Math.floor
This commit is contained in:
Christoph Oberhofer
2017-03-31 13:53:08 +02:00
committed by GitHub
parent 80a9f61b6f 25dd873d9c
commit f9a19e0a02
1 changed files with 4 additions and 4 deletions
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src/common/cv_utils.js
+4 -4
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@@ -488,7 +488,7 @@ export function grayAndHalfSampleFromCanvasData(canvasData, size, outArray) {
while (bottomRowIdx < endIdx) { while (bottomRowIdx < endIdx) {
for ( i = 0; i < outWidth; i++) { for ( i = 0; i < outWidth; i++) {
outArray[outImgIdx] = Math.floor(( outArray[outImgIdx] = (
(0.299 * canvasData[topRowIdx * 4 + 0] + (0.299 * canvasData[topRowIdx * 4 + 0] +
0.587 * canvasData[topRowIdx * 4 + 1] + 0.587 * canvasData[topRowIdx * 4 + 1] +
0.114 * canvasData[topRowIdx * 4 + 2]) + 0.114 * canvasData[topRowIdx * 4 + 2]) +
@@ -500,7 +500,7 @@ export function grayAndHalfSampleFromCanvasData(canvasData, size, outArray) {
0.114 * canvasData[(bottomRowIdx) * 4 + 2]) + 0.114 * canvasData[(bottomRowIdx) * 4 + 2]) +
(0.299 * canvasData[(bottomRowIdx + 1) * 4 + 0] + (0.299 * canvasData[(bottomRowIdx + 1) * 4 + 0] +
0.587 * canvasData[(bottomRowIdx + 1) * 4 + 1] + 0.587 * canvasData[(bottomRowIdx + 1) * 4 + 1] +
0.114 * canvasData[(bottomRowIdx + 1) * 4 + 2])) / 4); 0.114 * canvasData[(bottomRowIdx + 1) * 4 + 2])) / 4;
outImgIdx++; outImgIdx++;
topRowIdx = topRowIdx + 2; topRowIdx = topRowIdx + 2;
bottomRowIdx = bottomRowIdx + 2; bottomRowIdx = bottomRowIdx + 2;
@@ -521,8 +521,8 @@ export function computeGray(imageData, outArray, config) {
} }
} else { } else {
for (i = 0; i < l; i++) { for (i = 0; i < l; i++) {
outArray[i] = Math.floor( outArray[i] =
0.299 * imageData[i * 4 + 0] + 0.587 * imageData[i * 4 + 1] + 0.114 * imageData[i * 4 + 2]); 0.299 * imageData[i * 4 + 0] + 0.587 * imageData[i * 4 + 1] + 0.114 * imageData[i * 4 + 2];
} }
} }
}; };