|
| 1 | +/** |
| 2 | + * @license |
| 3 | + * Copyright 2019 Google LLC. All Rights Reserved. |
| 4 | + * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | + * you may not use this file except in compliance with the License. |
| 6 | + * You may obtain a copy of the License at |
| 7 | + * |
| 8 | + * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | + * |
| 10 | + * Unless required by applicable law or agreed to in writing, software |
| 11 | + * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | + * See the License for the specific language governing permissions and |
| 14 | + * limitations under the License. |
| 15 | + * ============================================================================= |
| 16 | + */ |
| 17 | + |
| 18 | +// TODO(smilkov): Import from "@tensoflow/tfjs-automl" when the package |
| 19 | +// is released. |
| 20 | +import * as automl from '../../src/index'; |
| 21 | + |
| 22 | +const MODEL_URL = |
| 23 | + 'https://storage.googleapis.com/tfjs-testing/tfjs-automl/object_detection/model.json'; |
| 24 | + |
| 25 | +async function run() { |
| 26 | + const model = await automl.loadObjectDetection(MODEL_URL); |
| 27 | + const image = document.getElementById('salad'); |
| 28 | + // These are the default options. |
| 29 | + const options = {score: 0.5, iou: 0.5, topk: 20}; |
| 30 | + const predictions = await model.detect(image, options); |
| 31 | + drawBoxes(predictions); |
| 32 | +} |
| 33 | + |
| 34 | +// Overlays boxes with labels onto the image using `rect` and `text` svg |
| 35 | +// elements. |
| 36 | +function drawBoxes(predictions) { |
| 37 | + const svg = document.querySelector('svg'); |
| 38 | + predictions.forEach(prediction => { |
| 39 | + const {box, label, score} = prediction; |
| 40 | + const {left, top, width, height} = box; |
| 41 | + const rect = document.createElementNS('http://www.w3.org/2000/svg', 'rect'); |
| 42 | + rect.setAttribute('width', width); |
| 43 | + rect.setAttribute('height', height); |
| 44 | + rect.setAttribute('x', left); |
| 45 | + rect.setAttribute('y', top); |
| 46 | + rect.setAttribute('class', 'box'); |
| 47 | + const text = document.createElementNS('http://www.w3.org/2000/svg', 'text'); |
| 48 | + text.setAttribute('x', left + width / 2); |
| 49 | + text.setAttribute('y', top); |
| 50 | + text.setAttribute('dy', 12); |
| 51 | + text.setAttribute('class', 'label'); |
| 52 | + text.textContent = `${label}: ${score.toFixed(3)}`; |
| 53 | + svg.appendChild(rect); |
| 54 | + svg.appendChild(text); |
| 55 | + const textBBox = text.getBBox(); |
| 56 | + const textRect = |
| 57 | + document.createElementNS('http://www.w3.org/2000/svg', 'rect'); |
| 58 | + textRect.setAttribute('x', textBBox.x); |
| 59 | + textRect.setAttribute('y', textBBox.y); |
| 60 | + textRect.setAttribute('width', textBBox.width); |
| 61 | + textRect.setAttribute('height', textBBox.height); |
| 62 | + textRect.setAttribute('class', 'label-rect'); |
| 63 | + svg.insertBefore(textRect, text); |
| 64 | + }); |
| 65 | +} |
| 66 | + |
| 67 | +run(); |
0 commit comments