TrackerMIL optimizations (#7032)

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### Motivation and context
<!-- Why is this change required? What problem does it solve? If it
fixes an open
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This PR fixes some problems with TrackerMIL memory managment
- Free up some memory after we are done with tracking
- Stable memory consuption while tracking (no endlessly raising heap
size)
Open a task with quite large images 2k -> create a couple of tracks ->
track a couple of frames:

![tracking](https://github.com/opencv/cvat/assets/50956430/087910dd-a0c8-4007-a25c-6952743c2f36)



### How has this been tested?
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- [ ] I submit my changes into the `develop` branch
- [ ] I have created a changelog fragment <!-- see top comment in
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[cvat-core](https://github.com/opencv/cvat/tree/develop/cvat-core#versioning),

[cvat-data](https://github.com/opencv/cvat/tree/develop/cvat-data#versioning)
and

[cvat-ui](https://github.com/opencv/cvat/tree/develop/cvat-ui#versioning))

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changelog.d/20231023_154559_klakhov_tracker_mil_optimizations.md

@@ -0,0 +1,4 @@
+### Fixed
+
+- OpenCV.js memory leak with TrackerMIL
+  (<https://github.com/opencv/cvat/pull/7032>)

cvat-ui/.eslintrc.js

@@ -14,7 +14,7 @@ module.exports = {
     ignorePatterns: [
         '.eslintrc.js',
         'webpack.config.js',
-        'src/assets/opencv_4.5.4_dev.js',
+        'src/assets/opencv*.js',
         'node_modules/**',
         'dist/**',
     ],

cvat-ui/package.json

@@ -1,6 +1,6 @@
 {
   "name": "cvat-ui",
-  "version": "1.58.0",
+  "version": "1.58.1",
   "description": "CVAT single-page application",
   "main": "src/index.tsx",
   "scripts": {

cvat-ui/src/components/annotation-page/standard-workspace/controls-side-bar/opencv-control.tsx

@@ -207,8 +207,10 @@ class OpenCVControlComponent extends React.PureComponent<Props & DispatchToProps
 
     public componentWillUnmount(): void {
         const { canvasInstance } = this.props;
+        const { trackedShapes } = this.state;
         canvasInstance.html().removeEventListener('canvas.interacted', this.interactionListener);
         openCVWrapper.removeProgressCallback();
+        trackedShapes.forEach((shape: TrackedShape) => shape.trackerModel.delete());
     }
 
     private interactionListener = async (e: Event): Promise<void> => {

cvat-ui/src/utils/opencv-wrapper/opencv-interfaces.ts

@@ -13,6 +13,7 @@ export interface TrackerModel {
     init: (src: ImageData, points: number[]) => void;
     reinit: (points: number[]) => void;
     update: (src: ImageData) => TrackingResult;
+    delete: () => void;
 }
 
 export interface OpenCVTracker {

cvat-ui/src/utils/opencv-wrapper/opencv-wrapper.ts

@@ -60,7 +60,7 @@ export class OpenCVWrapper {
     }
 
     private async inject(): Promise<void> {
-        const response = await fetch('/assets/opencv.js');
+        const response = await fetch('/assets/opencv_4.8.0.js');
         if (response.status !== 200) {
             throw new Error(`Response status ${response.status}. ${response.statusText}`);
         }
@@ -101,7 +101,7 @@ export class OpenCVWrapper {
 
         const global = window as any;
 
-        this.cv = await global.cv;
+        this.cv = global.cv;
     }
 
     public async initialize(onProgress: (percent: number) => void): Promise<void> {

cvat-ui/src/utils/opencv-wrapper/tracker-mil.ts

@@ -51,6 +51,8 @@ export default class TrackerMILImplementation implements TrackerMIL {
         if (!this.imageData) {
             throw Error('TrackerMIL needs to be initialized before re-initialization');
         }
+        this.trackerMIL.delete();
+        this.trackerMIL = new this.cv.TrackerMIL();
         this.init(this.imageData, points);
     }
 
@@ -65,4 +67,8 @@ export default class TrackerMILImplementation implements TrackerMIL {
             if (matImage) matImage.delete();
         }
     }
+
+    public delete(): void {
+        this.trackerMIL.delete();
+    }
 }

cvat-ui/webpack.config.js

@@ -210,8 +210,8 @@ module.exports = (env) => {
                         to  : 'assets/[name][ext]',
                     },
                     {
-                        from: 'src/assets/opencv*.js',
-                        to  : 'assets/opencv.js',
+                        from: 'src/assets/opencv_4.8.0.js',
+                        to  : 'assets/opencv_4.8.0.js',
                     },
                     {
                         from: 'plugins/**/assets/*.(onnx|js)',