@bigin/ns-firebase
Version:
74 lines (73 loc) • 2.44 kB
JavaScript
import { ImageSource } from '@nativescript/core';
import { MLKitAutoML as MLKitAutoMLBase } from './automl-common';
export class MLKitAutoML extends MLKitAutoMLBase {
createDetector() {
return getDetector(this.localModelResourceFolder, this.confidenceThreshold);
}
createSuccessListener() {
return (labels, error) => {
if (error !== null) {
console.log(error.localizedDescription);
} else if (labels !== null && labels.count > 0) {
const result = {
labels: [],
};
for (let i = 0, l = labels.count; i < l; i++) {
const label = labels.objectAtIndex(i);
result.labels.push({
text: label.text,
confidence: label.confidence,
});
}
this.notify({
eventName: MLKitAutoML.scanResultEvent,
object: this,
value: result,
});
}
};
}
rotateRecording() {
return true;
}
}
function getDetector(localModelResourceFolder, confidenceThreshold) {
const manifestPath = NSBundle.mainBundle.pathForResourceOfTypeInDirectory('manifest', 'json', localModelResourceFolder);
const fIRAutoMLLocalModel = FIRAutoMLLocalModel.alloc().initWithManifestPath(manifestPath);
const options = FIRVisionOnDeviceAutoMLImageLabelerOptions.alloc().initWithLocalModel(fIRAutoMLLocalModel);
options.confidenceThreshold = confidenceThreshold || 0.5;
const fIRVisionImageLabeler = FIRVision.vision().onDeviceAutoMLImageLabelerWithOptions(options);
return fIRVisionImageLabeler;
}
export function labelImage(options) {
return new Promise((resolve, reject) => {
try {
const labelDetector = getDetector(options.localModelResourceFolder, options.confidenceThreshold);
labelDetector.processImageCompletion(getImage(options), (labels, error) => {
if (error !== null) {
reject(error.localizedDescription);
} else if (labels !== null) {
const result = {
labels: [],
};
for (let i = 0, l = labels.count; i < l; i++) {
const label = labels.objectAtIndex(i);
result.labels.push({
text: label.text,
confidence: label.confidence,
});
}
resolve(result);
}
});
} catch (ex) {
console.log('Error in firebase.mlkit.labelImageOnDevice: ' + ex);
reject(ex);
}
});
}
function getImage(options) {
const image = options.image instanceof ImageSource ? options.image.ios : options.image.imageSource.ios;
return FIRVisionImage.alloc().initWithImage(image);
}
//# sourceMappingURL=index.ios.js.map