PredictAgeAndGenderTask

src/ageGenderNet/AgeGenderNet.ts

@@ -6,7 +6,7 @@ import { seperateWeightMaps } from '../faceProcessor/util';
 import { TinyXception } from '../xception/TinyXception';
 import { extractParams } from './extractParams';
 import { extractParamsFromWeigthMap } from './extractParamsFromWeigthMap';
-import { NetOutput, NetParams } from './types';
+import { AgeAndGenderPrediction, Gender, NetOutput, NetParams } from './types';
 
 export class AgeGenderNet extends NeuralNetwork<NetParams> {
 
@@ -50,17 +50,32 @@ export class AgeGenderNet extends NeuralNetwork<NetParams> {
     return this.forwardInput(await toNetInput(input))
   }
 
-  public async predictAgeAndGender(input: TNetInput): Promise<{ age: number, gender: string, genderProbability: number }> {
+  public async predictAgeAndGender(input: TNetInput): Promise<AgeAndGenderPrediction | AgeAndGenderPrediction[]> {
     const netInput = await toNetInput(input)
     const out = await this.forwardInput(netInput)
-    const age = (await out.age.data())[0]
-    const probMale = (await out.gender.data())[0]
 
-    const isMale = probMale > 0.5
-    const gender = isMale ? 'male' : 'female'
-    const genderProbability = isMale ? probMale : (1 - probMale)
-
-    return { age, gender, genderProbability }
+    const ages = tf.unstack(out.age)
+    const genders = tf.unstack(out.gender)
+    const ageAndGenderTensors = ages.map((ageTensor, i) => ({
+      ageTensor,
+      genderTensor: genders[i]
+    }))
+
+    const predictionsByBatch = await Promise.all(
+      ageAndGenderTensors.map(async ({ ageTensor, genderTensor }) => {
+        const age = (await ageTensor.data())[0]
+        const probMale = (await out.gender.data())[0]
+        const isMale = probMale > 0.5
+        const gender = isMale ? Gender.MALE : Gender.FEMALE
+        const genderProbability = isMale ? probMale : (1 - probMale)
+
+        return { age, gender, genderProbability }
+      })
+    )
+
+    return netInput.isBatchInput
+      ? predictionsByBatch
+      : predictionsByBatch[0]
   }
 
   protected getDefaultModelName(): string {

src/ageGenderNet/types.ts

 import * as tf from '@tensorflow/tfjs-core';
 import { TfjsImageRecognitionBase } from 'tfjs-image-recognition-base';
 
+export type AgeAndGenderPrediction = {
+  age: number
+  gender: Gender
+  genderProbability: number
+}
+
+export enum Gender {
+  FEMALE = 'female',
+  MALE = 'male'
+}
+
 export type NetOutput = { age: tf.Tensor1D, gender: tf.Tensor2D }
 
 export type NetParams = {

src/factories/WithAge.ts

+export type WithAge<TSource> = TSource & {
+  age: number
+}
+
+export function isWithAge(obj: any): obj is WithAge<{}> {
+  return typeof obj['age'] === 'number'
+}
+
+export function extendWithAge<
+  TSource
+> (
+  sourceObj: TSource,
+  age: number
+): WithAge<TSource> {
+
+  const extension = { age }
+  return Object.assign({}, sourceObj, extension)
+}
\ No newline at end of file

src/factories/WithGender.ts

+import { isValidProbablitiy } from 'tfjs-image-recognition-base';
+
+import { Gender } from '../ageGenderNet/types';
+
+export type WithGender<TSource> = TSource & {
+  gender: Gender
+  genderProbability: number
+}
+
+export function isWithGender(obj: any): obj is WithGender<{}> {
+  return (obj['gender'] === Gender.MALE || obj['gender'] === Gender.FEMALE)
+    && isValidProbablitiy(obj['genderProbability'])
+}
+
+export function extendWithGender<
+  TSource
+> (
+  sourceObj: TSource,
+  gender: Gender,
+  genderProbability: number
+): WithGender<TSource> {
+
+  const extension = { gender, genderProbability }
+  return Object.assign({}, sourceObj, extension)
+}
\ No newline at end of file

src/globalApi/ComputeFaceDescriptorsTasks.ts

-import * as tf from '@tensorflow/tfjs-core';
 import { TNetInput } from 'tfjs-image-recognition-base';
 
-import { extractFaces, extractFaceTensors } from '../dom';
 import { extendWithFaceDescriptor, WithFaceDescriptor } from '../factories/WithFaceDescriptor';
 import { WithFaceDetection } from '../factories/WithFaceDetection';
 import { WithFaceLandmarks } from '../factories/WithFaceLandmarks';
 import { ComposableTask } from './ComposableTask';
+import { extractAllFacesAndComputeResults, extractSingleFaceAndComputeResult } from './extractFacesAndComputeResults';
 import { nets } from './nets';
+import {
+  PredictAllAgeAndGenderWithFaceAlignmentTask,
+  PredictSingleAgeAndGenderWithFaceAlignmentTask,
+} from './PredictAgeAndGenderTask';
+import {
+  PredictAllFaceExpressionsWithFaceAlignmentTask,
+  PredictSingleFaceExpressionsWithFaceAlignmentTask,
+} from './PredictFaceExpressionsTask';
 
 export class ComputeFaceDescriptorsTaskBase<TReturn, TParentReturn> extends ComposableTask<TReturn> {
   constructor(
@@ -25,19 +32,25 @@ export class ComputeAllFaceDescriptorsTask<
 
     const parentResults = await this.parentTask
 
-    const dlibAlignedRects = parentResults.map(({ landmarks }) => landmarks.align(null, { useDlibAlignment: true }))
-    const dlibAlignedFaces: Array<HTMLCanvasElement | tf.Tensor3D> = this.input instanceof tf.Tensor
-      ? await extractFaceTensors(this.input, dlibAlignedRects)
-      : await extractFaces(this.input, dlibAlignedRects)
+    const descriptors = await extractAllFacesAndComputeResults<TSource, Float32Array[]>(
+      parentResults,
+      this.input,
+      faces => Promise.all(faces.map(face =>
+        nets.faceRecognitionNet.computeFaceDescriptor(face) as Promise<Float32Array>
+      )),
+      null,
+      parentResult => parentResult.landmarks.align(null, { useDlibAlignment: true })
+    )
 
-    const results = await Promise.all(parentResults.map(async (parentResult, i) => {
-      const descriptor = await nets.faceRecognitionNet.computeFaceDescriptor(dlibAlignedFaces[i]) as Float32Array
-      return extendWithFaceDescriptor<TSource>(parentResult, descriptor)
-    }))
+    return descriptors.map((descriptor, i) => extendWithFaceDescriptor<TSource>(parentResults[i], descriptor))
+  }
 
-    dlibAlignedFaces.forEach(f => f instanceof tf.Tensor && f.dispose())
+  withFaceExpressions(): PredictAllFaceExpressionsWithFaceAlignmentTask<WithFaceLandmarks<TSource>> {
+    return new PredictAllFaceExpressionsWithFaceAlignmentTask<WithFaceLandmarks<TSource>>(this, this.input)
+  }
 
-    return results
+  withAgeAndGender(): PredictAllAgeAndGenderWithFaceAlignmentTask<WithFaceLandmarks<TSource>> {
+    return new PredictAllAgeAndGenderWithFaceAlignmentTask<WithFaceLandmarks<TSource>>(this, this.input)
   }
 }
 
@@ -51,15 +64,22 @@ export class ComputeSingleFaceDescriptorTask<
     if (!parentResult) {
       return
     }
+    const descriptor = await extractSingleFaceAndComputeResult<TSource, Float32Array>(
+      parentResult,
+      this.input,
+      face => nets.faceRecognitionNet.computeFaceDescriptor(face) as Promise<Float32Array>,
+      null,
+      parentResult => parentResult.landmarks.align(null, { useDlibAlignment: true })
+    )
 
-    const dlibAlignedRect = parentResult.landmarks.align(null, { useDlibAlignment: true })
-    const alignedFaces: Array<HTMLCanvasElement | tf.Tensor3D> = this.input instanceof tf.Tensor
-      ? await extractFaceTensors(this.input, [dlibAlignedRect])
-      : await extractFaces(this.input, [dlibAlignedRect])
-    const descriptor = await nets.faceRecognitionNet.computeFaceDescriptor(alignedFaces[0]) as Float32Array
+    return extendWithFaceDescriptor(parentResult, descriptor)
+  }
 
-    alignedFaces.forEach(f => f instanceof tf.Tensor && f.dispose())
+  withFaceExpressions(): PredictSingleFaceExpressionsWithFaceAlignmentTask<WithFaceLandmarks<TSource>> {
+    return new PredictSingleFaceExpressionsWithFaceAlignmentTask<WithFaceLandmarks<TSource>>(this, this.input)
+  }
 
-    return extendWithFaceDescriptor(parentResult, descriptor)
+  withAgeAndGender(): PredictSingleAgeAndGenderWithFaceAlignmentTask<WithFaceLandmarks<TSource>> {
+    return new PredictSingleAgeAndGenderWithFaceAlignmentTask<WithFaceLandmarks<TSource>>(this, this.input)
   }
 }
\ No newline at end of file

src/globalApi/DetectFaceLandmarksTasks.ts

@@ -11,6 +11,10 @@ import { ComposableTask } from './ComposableTask';
 import { ComputeAllFaceDescriptorsTask, ComputeSingleFaceDescriptorTask } from './ComputeFaceDescriptorsTasks';
 import { nets } from './nets';
 import {
+  PredictAllAgeAndGenderWithFaceAlignmentTask,
+  PredictSingleAgeAndGenderWithFaceAlignmentTask,
+} from './PredictAgeAndGenderTask';
+import {
   PredictAllFaceExpressionsWithFaceAlignmentTask,
   PredictSingleFaceExpressionsWithFaceAlignmentTask,
 } from './PredictFaceExpressionsTask';
@@ -59,6 +63,10 @@ export class DetectAllFaceLandmarksTask<
     return new PredictAllFaceExpressionsWithFaceAlignmentTask<WithFaceLandmarks<TSource>>(this, this.input)
   }
 
+  withAgeAndGender(): PredictAllAgeAndGenderWithFaceAlignmentTask<WithFaceLandmarks<TSource>> {
+    return new PredictAllAgeAndGenderWithFaceAlignmentTask<WithFaceLandmarks<TSource>>(this, this.input)
+  }
+
   withFaceDescriptors(): ComputeAllFaceDescriptorsTask<WithFaceLandmarks<TSource>> {
     return new ComputeAllFaceDescriptorsTask<WithFaceLandmarks<TSource>>(this, this.input)
   }
@@ -91,6 +99,10 @@ export class DetectSingleFaceLandmarksTask<
     return new PredictSingleFaceExpressionsWithFaceAlignmentTask<WithFaceLandmarks<TSource>>(this, this.input)
   }
 
+  withAgeAndGender(): PredictSingleAgeAndGenderWithFaceAlignmentTask<WithFaceLandmarks<TSource>> {
+    return new PredictSingleAgeAndGenderWithFaceAlignmentTask<WithFaceLandmarks<TSource>>(this, this.input)
+  }
+
   withFaceDescriptor(): ComputeSingleFaceDescriptorTask<WithFaceLandmarks<TSource>> {
     return new ComputeSingleFaceDescriptorTask<WithFaceLandmarks<TSource>>(this, this.input)
   }

src/globalApi/PredictAgeAndGenderTask.ts

+import * as tf from '@tensorflow/tfjs-core';
+import { TNetInput } from 'tfjs-image-recognition-base';
+
+import { AgeAndGenderPrediction } from '../ageGenderNet/types';
+import { extendWithAge, WithAge } from '../factories/WithAge';
+import { WithFaceDetection } from '../factories/WithFaceDetection';
+import { WithFaceLandmarks } from '../factories/WithFaceLandmarks';
+import { extendWithGender, WithGender } from '../factories/WithGender';
+import { ComposableTask } from './ComposableTask';
+import { ComputeAllFaceDescriptorsTask, ComputeSingleFaceDescriptorTask } from './ComputeFaceDescriptorsTasks';
+import { extractAllFacesAndComputeResults, extractSingleFaceAndComputeResult } from './extractFacesAndComputeResults';
+import { nets } from './nets';
+import {
+  PredictAllFaceExpressionsWithFaceAlignmentTask,
+  PredictSingleFaceExpressionsWithFaceAlignmentTask,
+} from './PredictFaceExpressionsTask';
+
+export class PredictAgeAndGenderTaskBase<TReturn, TParentReturn> extends ComposableTask<TReturn> {
+  constructor(
+    protected parentTask: ComposableTask<TParentReturn> | Promise<TParentReturn>,
+    protected input: TNetInput,
+    protected extractedFaces?: Array<HTMLCanvasElement | tf.Tensor3D>
+  ) {
+    super()
+  }
+}
+
+export class PredictAllAgeAndGenderTask<
+  TSource extends WithFaceDetection<{}>
+> extends PredictAgeAndGenderTaskBase<WithAge<WithGender<TSource>>[], TSource[]> {
+
+  public async run(): Promise<WithAge<WithGender<TSource>>[]> {
+
+    const parentResults = await this.parentTask
+
+    const ageAndGenderByFace = await extractAllFacesAndComputeResults<TSource, AgeAndGenderPrediction[]>(
+      parentResults,
+      this.input,
+      async faces => await Promise.all(faces.map(
+        face => nets.ageGenderNet.predictAgeAndGender(face) as Promise<AgeAndGenderPrediction>
+      )),
+      this.extractedFaces
+    )
+
+    return parentResults.map((parentResult, i) => {
+      const { age, gender, genderProbability } = ageAndGenderByFace[i]
+      return extendWithAge(extendWithGender(parentResult, gender, genderProbability), age)
+    })
+  }
+}
+
+export class PredictSingleAgeAndGenderTask<
+  TSource extends WithFaceDetection<{}>
+>  extends PredictAgeAndGenderTaskBase<WithAge<WithGender<TSource>> | undefined, TSource | undefined> {
+
+  public async run(): Promise<WithAge<WithGender<TSource>> | undefined> {
+
+    const parentResult = await this.parentTask
+    if (!parentResult) {
+      return
+    }
+
+    const { age, gender, genderProbability } = await extractSingleFaceAndComputeResult<TSource, AgeAndGenderPrediction>(
+      parentResult,
+      this.input,
+      face => nets.ageGenderNet.predictAgeAndGender(face) as Promise<AgeAndGenderPrediction>,
+      this.extractedFaces
+    )
+
+    return extendWithAge(extendWithGender(parentResult, gender, genderProbability), age)
+  }
+}
+
+export class PredictAllAgeAndGenderWithFaceAlignmentTask<
+  TSource extends WithFaceLandmarks<WithFaceDetection<{}>>
+> extends PredictAllAgeAndGenderTask<TSource> {
+
+  withFaceExpressions(): PredictAllFaceExpressionsWithFaceAlignmentTask<WithFaceLandmarks<TSource>> {
+    return new PredictAllFaceExpressionsWithFaceAlignmentTask<WithFaceLandmarks<TSource>>(this, this.input)
+  }
+
+  withFaceDescriptors(): ComputeAllFaceDescriptorsTask<WithFaceLandmarks<TSource>> {
+    return new ComputeAllFaceDescriptorsTask<WithFaceLandmarks<TSource>>(this, this.input)
+  }
+}
+
+export class PredictSingleAgeAndGenderWithFaceAlignmentTask<
+  TSource extends WithFaceLandmarks<WithFaceDetection<{}>>
+> extends PredictSingleAgeAndGenderTask<TSource> {
+
+  withFaceExpressions(): PredictSingleFaceExpressionsWithFaceAlignmentTask<WithFaceLandmarks<TSource>> {
+    return new PredictSingleFaceExpressionsWithFaceAlignmentTask<WithFaceLandmarks<TSource>>(this, this.input)
+  }
+
+  withFaceDescriptor(): ComputeSingleFaceDescriptorTask<WithFaceLandmarks<TSource>> {
+    return new ComputeSingleFaceDescriptorTask<WithFaceLandmarks<TSource>>(this, this.input)
+  }
+}
\ No newline at end of file

src/globalApi/PredictFaceExpressionsTask.ts

 import * as tf from '@tensorflow/tfjs-core';
 import { TNetInput } from 'tfjs-image-recognition-base';
 
-import { extractFaces, extractFaceTensors } from '../dom';
 import { FaceExpressions } from '../faceExpressionNet/FaceExpressions';
 import { WithFaceDetection } from '../factories/WithFaceDetection';
 import { extendWithFaceExpressions, WithFaceExpressions } from '../factories/WithFaceExpressions';
-import { isWithFaceLandmarks, WithFaceLandmarks } from '../factories/WithFaceLandmarks';
+import { WithFaceLandmarks } from '../factories/WithFaceLandmarks';
 import { ComposableTask } from './ComposableTask';
 import { ComputeAllFaceDescriptorsTask, ComputeSingleFaceDescriptorTask } from './ComputeFaceDescriptorsTasks';
+import { extractAllFacesAndComputeResults, extractSingleFaceAndComputeResult } from './extractFacesAndComputeResults';
 import { nets } from './nets';
+import {
+  PredictAllAgeAndGenderWithFaceAlignmentTask,
+  PredictSingleAgeAndGenderWithFaceAlignmentTask,
+} from './PredictAgeAndGenderTask';
 
 export class PredictFaceExpressionsTaskBase<TReturn, TParentReturn> extends ComposableTask<TReturn> {
   constructor(
     protected parentTask: ComposableTask<TParentReturn> | Promise<TParentReturn>,
-    protected input: TNetInput
+    protected input: TNetInput,
+    protected extractedFaces?: Array<HTMLCanvasElement | tf.Tensor3D>
   ) {
     super()
   }
@@ -27,18 +32,14 @@ export class PredictAllFaceExpressionsTask<
 
     const parentResults = await this.parentTask
 
-    const faceBoxes = parentResults.map(
-      parentResult => isWithFaceLandmarks(parentResult) ? parentResult.alignedRect : parentResult.detection
+    const faceExpressionsByFace = await extractAllFacesAndComputeResults<TSource, FaceExpressions[]>(
+      parentResults,
+      this.input,
+      async faces => await Promise.all(faces.map(
+        face => nets.faceExpressionNet.predictExpressions(face) as Promise<FaceExpressions>
+      )),
+      this.extractedFaces
     )
-    const faces: Array<HTMLCanvasElement | tf.Tensor3D> = this.input instanceof tf.Tensor
-      ? await extractFaceTensors(this.input, faceBoxes)
-      : await extractFaces(this.input, faceBoxes)
-
-    const faceExpressionsByFace = await Promise.all(faces.map(
-      face => nets.faceExpressionNet.predictExpressions(face)
-    )) as FaceExpressions[]
-
-    faces.forEach(f => f instanceof tf.Tensor && f.dispose())
 
     return parentResults.map(
       (parentResult, i) => extendWithFaceExpressions<TSource>(parentResult, faceExpressionsByFace[i])
@@ -57,14 +58,12 @@ export class PredictSingleFaceExpressionsTask<
       return
     }
 
-    const faceBox = isWithFaceLandmarks(parentResult) ? parentResult.alignedRect : parentResult.detection
-    const faces: Array<HTMLCanvasElement | tf.Tensor3D> = this.input instanceof tf.Tensor
-      ? await extractFaceTensors(this.input, [faceBox])
-      : await extractFaces(this.input, [faceBox])
-
-    const faceExpressions = await nets.faceExpressionNet.predictExpressions(faces[0]) as FaceExpressions
-
-    faces.forEach(f => f instanceof tf.Tensor && f.dispose())
+    const faceExpressions = await extractSingleFaceAndComputeResult<TSource, FaceExpressions>(
+      parentResult,
+      this.input,
+      face => nets.faceExpressionNet.predictExpressions(face) as Promise<FaceExpressions>,
+      this.extractedFaces
+    )
 
     return extendWithFaceExpressions(parentResult, faceExpressions)
   }
@@ -74,6 +73,10 @@ export class PredictAllFaceExpressionsWithFaceAlignmentTask<
   TSource extends WithFaceLandmarks<WithFaceDetection<{}>>
 > extends PredictAllFaceExpressionsTask<TSource> {
 
+  withAgeAndGender(): PredictAllAgeAndGenderWithFaceAlignmentTask<WithFaceLandmarks<TSource>> {
+    return new PredictAllAgeAndGenderWithFaceAlignmentTask<WithFaceLandmarks<TSource>>(this, this.input)
+  }
+
   withFaceDescriptors(): ComputeAllFaceDescriptorsTask<WithFaceLandmarks<TSource>> {
     return new ComputeAllFaceDescriptorsTask<WithFaceLandmarks<TSource>>(this, this.input)
   }
@@ -83,6 +86,10 @@ export class PredictSingleFaceExpressionsWithFaceAlignmentTask<
   TSource extends WithFaceLandmarks<WithFaceDetection<{}>>
 > extends PredictSingleFaceExpressionsTask<TSource> {
 
+  withAgeAndGender(): PredictSingleAgeAndGenderWithFaceAlignmentTask<WithFaceLandmarks<TSource>> {
+    return new PredictSingleAgeAndGenderWithFaceAlignmentTask<WithFaceLandmarks<TSource>>(this, this.input)
+  }
+
   withFaceDescriptor(): ComputeSingleFaceDescriptorTask<WithFaceLandmarks<TSource>> {
     return new ComputeSingleFaceDescriptorTask<WithFaceLandmarks<TSource>>(this, this.input)
   }

src/globalApi/extractFacesAndComputeResults.ts

+import * as tf from '@tensorflow/tfjs-core';
+import { TNetInput } from 'tfjs-image-recognition-base';
+
+import { FaceDetection } from '../classes/FaceDetection';
+import { extractFaces, extractFaceTensors } from '../dom';
+import { WithFaceDetection } from '../factories/WithFaceDetection';
+import { isWithFaceLandmarks, WithFaceLandmarks } from '../factories/WithFaceLandmarks';
+
+export async function extractAllFacesAndComputeResults<TSource extends WithFaceDetection<{}>, TResult>(
+  parentResults: TSource[],
+  input: TNetInput,
+  computeResults: (faces: Array<HTMLCanvasElement | tf.Tensor3D>) => Promise<TResult>,
+  extractedFaces?: Array<HTMLCanvasElement | tf.Tensor3D> | null,
+  getRectForAlignment: (parentResult: WithFaceLandmarks<TSource, any>) => FaceDetection = ({ alignedRect }) => alignedRect
+) {
+  const faceBoxes = parentResults.map(parentResult =>
+    isWithFaceLandmarks(parentResult)
+      ? getRectForAlignment(parentResult)
+      : parentResult.detection
+  )
+  const faces: Array<HTMLCanvasElement | tf.Tensor3D> = extractedFaces || (
+    input instanceof tf.Tensor
+      ? await extractFaceTensors(input, faceBoxes)
+      : await extractFaces(input, faceBoxes)
+  )
+
+  const results = await computeResults(faces)
+
+  faces.forEach(f => f instanceof tf.Tensor && f.dispose())
+
+  return results
+}
+
+export async function extractSingleFaceAndComputeResult<TSource extends WithFaceDetection<{}>, TResult>(
+  parentResult: TSource,
+  input: TNetInput,
+  computeResult: (face: HTMLCanvasElement | tf.Tensor3D) => Promise<TResult>,
+  extractedFaces?: Array<HTMLCanvasElement | tf.Tensor3D> | null,
+  getRectForAlignment?: (parentResult: WithFaceLandmarks<TSource, any>) => FaceDetection
+) {
+  return extractAllFacesAndComputeResults<TSource, TResult>(
+    [parentResult],
+    input,
+    async faces => computeResult(faces[0]),
+    extractedFaces,
+    getRectForAlignment
+  )
+}
\ No newline at end of file

src/globalApi/nets.ts

 import { TfjsImageRecognitionBase, TNetInput } from 'tfjs-image-recognition-base';
 
+import { AgeGenderNet } from '../ageGenderNet/AgeGenderNet';
+import { AgeAndGenderPrediction } from '../ageGenderNet/types';
 import { FaceDetection } from '../classes/FaceDetection';
 import { FaceLandmarks5 } from '../classes/FaceLandmarks5';
 import { FaceLandmarks68 } from '../classes/FaceLandmarks68';
@@ -26,7 +28,8 @@ export const nets = {
   faceLandmark68Net: new FaceLandmark68Net(),
   faceLandmark68TinyNet: new FaceLandmark68TinyNet(),
   faceRecognitionNet: new FaceRecognitionNet(),
-  faceExpressionNet: new FaceExpressionNet()
+  faceExpressionNet: new FaceExpressionNet(),
+  ageGenderNet: new AgeGenderNet()
 }
 
 /**
@@ -107,16 +110,25 @@ export const computeFaceDescriptor = (input: TNetInput): Promise<Float32Array |
 
 
 /**
- * Recognizes the facial expressions of a face and returns the likelyhood of
- * each facial expression.
+ * Recognizes the facial expressions from a face image.
  *
  * @param inputs The face image extracted from the bounding box of a face. Can
  * also be an array of input images, which will be batch processed.
- * @returns An array of facial expressions with corresponding probabilities or array thereof in case of batch input.
+ * @returns Facial expressions with corresponding probabilities or array thereof in case of batch input.
  */
 export const recognizeFaceExpressions = (input: TNetInput): Promise<FaceExpressions | FaceExpressions[]> =>
   nets.faceExpressionNet.predictExpressions(input)
 
+/**
+ * Predicts age and gender from a face image.
+ *
+ * @param inputs The face image extracted from the bounding box of a face. Can
+ * also be an array of input images, which will be batch processed.
+ * @returns Predictions with age, gender and gender probability or array thereof in case of batch input.
+ */
+export const predictAgeAndGender = (input: TNetInput): Promise<AgeAndGenderPrediction | AgeAndGenderPrediction[]> =>
+  nets.ageGenderNet.predictAgeAndGender(input)
+
 export const loadSsdMobilenetv1Model = (url: string) => nets.ssdMobilenetv1.load(url)
 export const loadTinyFaceDetectorModel = (url: string) => nets.tinyFaceDetector.load(url)
 export const loadMtcnnModel = (url: string) => nets.mtcnn.load(url)