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Add image blurring and utility functions
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| import StackBlur from 'stackblur-canvas' | ||
| import Canvas, { Image } from 'canvas' | ||
| import fs from 'fs' | ||
| import * as Api from './Api' | ||
| import path from 'path' | ||
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| const blurImage = (file, videoResolution, face, radiusBlur=70) => { | ||
| const canvasOriginal = new Canvas(videoResolution.width, videoResolution.height) | ||
| const canvasBlur = new Canvas(videoResolution.width, videoResolution.height) | ||
| const ctxOriginal = canvasOriginal.getContext('2d') | ||
| const ctxBlur = canvasBlur.getContext('2d') | ||
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| fs.readFile(file, (err, data) => { | ||
| if (err) console.error(err) | ||
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| const img = new Canvas.Image | ||
| img.src = data | ||
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| ctxOriginal.drawImage(img, 0, 0, img.width, img.height) | ||
| ctxBlur.drawImage(img, 0, 0, img.width, img.height) | ||
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| const imageData = ctxOriginal.getImageData(face.x, face.y, face.width, face.height) | ||
| StackBlur.imageDataRGBA(imageData, face.x, face.y, face.width, face.height, radiusBlur) | ||
| ctxBlur.putImageData(imageData, face.x, face.y) | ||
| const stream = canvasBlur.createJPEGStream({ bufsize: 2048, quality: 100 }) | ||
| const out = fs.createWriteStream(file) | ||
| stream.on('data', chunk => out.write(chunk)) | ||
| }) | ||
| } | ||
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| let intermediateDir | ||
| const getNthImage = n => `./${intermediateDir}/${n}.jpg` | ||
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| export const blurFacesInVideo = async (referenceImage, video, start=1, end=190, frequency=25) => { | ||
| return await new Promise(async (resolve, reject) => { | ||
| intermediateDir = `${video.src.slice(0,-4)}` | ||
| const refLink = await Api.getImgurLink(referenceImage) | ||
| let refFaceId = await Api.getReferenceFace(refLink) | ||
| refFaceId = refFaceId[0].faceId | ||
| console.log(refFaceId) | ||
| const candidates = {} | ||
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| for (let i = start; i < end - frequency; i+=frequency) { | ||
| const frameLink = await Api.getImgurLink(getNthImage(i)) | ||
| const faces = await Api.getFaces(frameLink) | ||
| for (let j = 0; j < faces.length; j++) { | ||
| const id = faces[j].faceId | ||
| const rectangle = faces[j].faceRectangle | ||
| candidates[id] = { frame: i, rectangle } | ||
| } | ||
| } | ||
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| const candidateFaceIds = Object.keys(candidates) | ||
| console.log('CandidateFaceIds', candidateFaceIds) | ||
| const matches = await Api.getComparison(refFaceId, candidateFaceIds) | ||
| console.log('Matches', matches) | ||
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| for (let i = 0; i < matches.length; i++) { | ||
| const id = matches[i].faceId | ||
| const { frame, rectangle } = candidates[id] | ||
| const face = { | ||
| x: rectangle.left, | ||
| y: rectangle.top, | ||
| width: rectangle.width + 50, | ||
| height: rectangle.height + 50 | ||
| } | ||
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| const startFrame = frame > 5 ? frame - 5 : frame | ||
| for (let i = startFrame; i < frame + 25; i++) { | ||
| blurImage(getNthImage(i), video.resolution, face) | ||
| } | ||
| } | ||
| resolve() | ||
| }) | ||
| } |
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