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[GSoC 2019] Improve the performance of JavaScript version of OpenCV (OpenCV.js)
* [GSoC 2019]
Improve the performance of JavaScript version of OpenCV (OpenCV.js):
1. Create the base of OpenCV.js performance test:
This perf test is based on benchmark.js(https://benchmarkjs.com). And first add `cvtColor`, `Resize`, `Threshold` into it.
2. Optimize the OpenCV.js performance by WASM threads:
This optimization is based on Web Worker API and SharedArrayBuffer, so it can be only used in browser.
3. Optimize the OpenCV.js performance by WASM SIMD:
Add WASM SIMD backend for OpenCV Universal Intrinsics. It's experimental as WASM SIMD is still in development.
* [GSoC2019]
1. use short license header
2. fix documentation node issue
3. remove the unused `hasSIMD128()` api
* [GSoC2019]
1. fix emscripten define
2. use fallback function for f16
* [GSoC2019]
Fix rebase issue
59 lines
1.6 KiB
JavaScript
59 lines
1.6 KiB
JavaScript
var fillGradient = function(cv, img, delta=5) {
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let ch = img.channels();
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console.assert(!img.empty() && img.depth() == cv.CV_8U && ch <= 4);
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let n = 255 / delta;
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for(let r = 0; r < img.rows; ++r) {
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let kR = r % (2*n);
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let valR = (kR<=n) ? delta*kR : delta*(2*n-kR);
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for(let c = 0; c < img.cols; ++c) {
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let kC = c % (2*n);
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let valC = (kC<=n) ? delta*kC : delta*(2*n-kC);
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let vals = [valR, valC, 200*r/img.rows, 255];
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let p = img.ptr(r, c);
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for(let i = 0; i < ch; ++i) p[i] = vals[i];
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}
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}
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}
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var cvtStr2cvSize = function(strSize) {
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let size;
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switch(strSize) {
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case "127,61": size = cvSize.szODD;break;
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case '320,240': size = cvSize.szQVGA;break;
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case '640,480': size = cvSize.szVGA;break;
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case '960,540': size = cvSize.szqHD;break;
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case '1280,720': size = cvSize.sz720p;break;
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case '1920,1080': size = cvSize.sz1080p;break;
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case "130,60": size = cvSize.sz130x60;break;
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case '213,120': size = cvSize.sz213x120;break;
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default: console.error("unsupported size for this case");
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}
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return size;
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}
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var combine = function() {
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let result = [[]];
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for (let i = 0; i < arguments.length; ++i) {
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result = permute(result, arguments[i]);
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}
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return result;
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}
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function permute (source, target) {
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let result = [];
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for (let i = 0; i < source.length; ++i) {
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for (let j = 0; j < target.length; ++j) {
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let tmp = source[i].slice();
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tmp.push(target[j]);
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result.push(tmp);
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}
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}
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return result;
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}
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if (typeof window === 'undefined') {
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exports.fillGradient = fillGradient;
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exports.cvtStr2cvSize = cvtStr2cvSize;
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exports.combine = combine;
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} |