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FaceRecognizer.cs
executable file
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FaceRecognizer.cs
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/*
* Copyright (c) 2016 Samsung Electronics Co., Ltd All Rights Reserved
*
* Licensed under the Apache License, Version 2.0 (the License);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
using System;
using System.Runtime.InteropServices;
using System.Threading.Tasks;
using InteropFace = Interop.MediaVision.Face;
namespace Tizen.Multimedia.Vision
{
/// <summary>
/// Provides the ability to recognize faces, face expressions, and eye condition on image sources.
/// </summary>
/// <since_tizen> 4 </since_tizen>
public static class FaceRecognizer
{
/// <summary>
/// Performs face recognition on the source with <see cref="FaceRecognitionModel"/>.
/// </summary>
/// <param name="source">The <see cref="MediaVisionSource"/> of the media to recognize faces for.</param>
/// <param name="recognitionModel">The <see cref="FaceRecognitionConfiguration"/> to be used for recognition.</param>
/// <returns>A task that represents the asynchronous recognition operation.</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="source"/> is null.<br/>
/// -or-<br/>
/// <paramref name="recognitionModel"/> is null.
/// </exception>
/// <exception cref="NotSupportedException">The feature is not supported.</exception>
/// <exception cref="ObjectDisposedException"><paramref name="source"/> has already been disposed of.</exception>
/// <exception cref="InvalidOperationException"><paramref name="recognitionModel"/> is untrained model.</exception>
/// <feature>http://tizen.org/feature/vision.face_recognition</feature>
/// <since_tizen> 4 </since_tizen>
public static async Task<FaceRecognitionResult> RecognizeAsync(MediaVisionSource source,
FaceRecognitionModel recognitionModel)
{
return await InvokeRecognizeAsync(source, recognitionModel, null, null);
}
/// <summary>
/// Performs face recognition on the source with <see cref="FaceRecognitionModel"/> and a bounding box.
/// </summary>
/// <param name="source">The <see cref="MediaVisionSource"/> of the media to recognize faces for.</param>
/// <param name="recognitionModel">The <see cref="FaceRecognitionModel"/> to be used for recognition.</param>
/// <param name="bound">Rectangular box bounding face image on the source.</param>
/// <returns>A task that represents the asynchronous recognition operation.</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="source"/> is null.<br/>
/// -or-<br/>
/// <paramref name="recognitionModel"/> is null.
/// </exception>
/// <exception cref="NotSupportedException">The feature is not supported.</exception>
/// <exception cref="ObjectDisposedException"><paramref name="source"/> has already been disposed of.</exception>
/// <exception cref="InvalidOperationException"><paramref name="recognitionModel"/> is untrained model.</exception>
/// <feature>http://tizen.org/feature/vision.face_recognition</feature>
/// <since_tizen> 4 </since_tizen>
public static async Task<FaceRecognitionResult> RecognizeAsync(MediaVisionSource source,
FaceRecognitionModel recognitionModel, Rectangle bound)
{
return await InvokeRecognizeAsync(source, recognitionModel, bound, null);
}
/// <summary>
/// Performs face recognition on the source with <see cref="FaceRecognitionModel"/> and <see cref="FaceRecognitionConfiguration"/>.
/// </summary>
/// <param name="source">The <see cref="MediaVisionSource"/> of the media to recognize faces for.</param>
/// <param name="recognitionModel">The <see cref="FaceRecognitionModel"/> to be used for recognition.</param>
/// <param name="config">The configuration used for recognition. This value can be null.</param>
/// <returns>A task that represents the asynchronous recognition operation.</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="source"/> is null.<br/>
/// -or-<br/>
/// <paramref name="recognitionModel"/> is null.
/// </exception>
/// <exception cref="NotSupportedException">The feature is not supported.</exception>
/// <exception cref="ObjectDisposedException">
/// <paramref name="source"/> has already been disposed of.<br/>
/// -or-<br/>
/// <paramref name="config"/> has already been disposed of.
/// </exception>
/// <exception cref="InvalidOperationException"><paramref name="recognitionModel"/> is untrained model.</exception>
/// <feature>http://tizen.org/feature/vision.face_recognition</feature>
/// <since_tizen> 4 </since_tizen>
public static async Task<FaceRecognitionResult> RecognizeAsync(MediaVisionSource source,
FaceRecognitionModel recognitionModel, FaceRecognitionConfiguration config)
{
return await InvokeRecognizeAsync(source, recognitionModel, null, config);
}
/// <summary>
/// Performs face recognition on the source with <see cref="FaceRecognitionModel"/>, <see cref="FaceRecognitionConfiguration"/>
/// and a bounding box.
/// </summary>
/// <param name="source">The <see cref="MediaVisionSource"/> of the media to recognize faces for.</param>
/// <param name="recognitionModel">The <see cref="FaceRecognitionModel"/> to be used for recognition.</param>
/// <param name="bound">Rectangular box bounding face image on the source.</param>
/// <param name="config">The <see cref="FaceRecognitionConfiguration"/> used for recognition. This value can be null.</param>
/// <returns>A task that represents the asynchronous recognition operation.</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="source"/> is null.<br/>
/// -or-<br/>
/// <paramref name="recognitionModel"/> is null.
/// </exception>
/// <exception cref="NotSupportedException">The feature is not supported.</exception>
/// <exception cref="ObjectDisposedException">
/// <paramref name="source"/> has already been disposed of.<br/>
/// -or-<br/>
/// <paramref name="config"/> has already been disposed of.
/// </exception>
/// <exception cref="InvalidOperationException"><paramref name="recognitionModel"/> is untrained model.</exception>
/// <feature>http://tizen.org/feature/vision.face_recognition</feature>
/// <since_tizen> 4 </since_tizen>
public static async Task<FaceRecognitionResult> RecognizeAsync(MediaVisionSource source,
FaceRecognitionModel recognitionModel, Rectangle bound, FaceRecognitionConfiguration config)
{
return await InvokeRecognizeAsync(source, recognitionModel, bound, config);
}
private static MediaVisionError InvokeRecognize(IntPtr sourceHandle, IntPtr modelHandle,
IntPtr configHandle, InteropFace.RecognizedCallback cb, Rectangle? area)
{
if (area == null)
{
return InteropFace.Recognize(sourceHandle, modelHandle, configHandle, IntPtr.Zero, cb);
}
var rect = area.Value.ToMarshalable();
return InteropFace.Recognize(sourceHandle, modelHandle, configHandle, ref rect, cb);
}
private static async Task<FaceRecognitionResult> InvokeRecognizeAsync(MediaVisionSource source,
FaceRecognitionModel recognitionModel, Rectangle? area,
FaceRecognitionConfiguration config)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (recognitionModel == null)
{
throw new ArgumentNullException(nameof(recognitionModel));
}
TaskCompletionSource<FaceRecognitionResult> tcs = new TaskCompletionSource<FaceRecognitionResult>();
using (var cb = ObjectKeeper.Get(GetRecognizedCallback(tcs)))
{
InvokeRecognize(source.Handle, recognitionModel.Handle, EngineConfiguration.GetHandle(config),
cb.Target, area).Validate("Failed to perform face recognition.");
return await tcs.Task;
}
}
private static FaceRecognitionResult CreateRecognitionResult(
IntPtr faceLocationPtr, IntPtr faceLabelPtr, double confidence)
{
int faceLabel = 0;
if (faceLabelPtr != IntPtr.Zero)
{
faceLabel = Marshal.ReadInt32(faceLabelPtr);
}
Rectangle? faceLocation = null;
if (faceLocationPtr != IntPtr.Zero)
{
var area = Marshal.PtrToStructure<global::Interop.MediaVision.Rectangle>(faceLocationPtr);
faceLocation = area.ToApiStruct();
}
return new FaceRecognitionResult(faceLabelPtr != IntPtr.Zero, confidence, faceLabel, faceLocation);
}
private static InteropFace.RecognizedCallback GetRecognizedCallback(
TaskCompletionSource<FaceRecognitionResult> tcs)
{
return (IntPtr sourceHandle, IntPtr recognitionModelHandle,
IntPtr engineCfgHandle, IntPtr faceLocationPtr, IntPtr faceLabelPtr, double confidence, IntPtr _) =>
{
try
{
if (!tcs.TrySetResult(CreateRecognitionResult(faceLocationPtr, faceLabelPtr, confidence)))
{
Log.Error(MediaVisionLog.Tag, "Failed to set result");
}
}
catch (Exception e)
{
MultimediaLog.Error(MediaVisionLog.Tag, "Setting recognition result failed.", e);
tcs.TrySetException(e);
}
};
}
/// <summary>
/// Determines eye-blink condition on media source.
/// </summary>
/// <param name="source">The source of the media to recognize eye-blink condition for.</param>
/// <param name="bound">The bounding the face at the source.</param>
/// <returns>A task that represents the asynchronous recognition operation.</returns>
/// <exception cref="ArgumentNullException"><paramref name="source"/> is null.</exception>
/// <exception cref="ObjectDisposedException"><paramref name="source"/> has already been disposed of.</exception>
/// <exception cref="NotSupportedException">The feature is not supported.</exception>
/// <feature>http://tizen.org/feature/vision.face_recognition</feature>
/// <since_tizen> 4 </since_tizen>
public static async Task<EyeCondition> RecognizeEyeConditionAsync(MediaVisionSource source,
Rectangle bound)
{
return await RecognizeEyeConditionAsync(source, bound, null);
}
/// <summary>
/// Determines eye-blink condition on the media source.
/// </summary>
/// <param name="source">The source of the media to recognize eye-blink condition for.</param>
/// <param name="bound">The bounding the face at the source.</param>
/// <param name="config">The configuration used for eye-blink condition recognition. This value can be null.</param>
/// <returns>A task that represents the asynchronous recognition operation.</returns>
/// <exception cref="ArgumentNullException"><paramref name="source"/> is null.</exception>
/// <exception cref="ObjectDisposedException">
/// <paramref name="source"/> has already been disposed of.<br/>
/// -or-<br/>
/// <paramref name="config"/> has already been disposed of.
/// </exception>
/// <exception cref="NotSupportedException">The feature is not supported.</exception>
/// <feature>http://tizen.org/feature/vision.face_recognition</feature>
/// <since_tizen> 4 </since_tizen>
public static async Task<EyeCondition> RecognizeEyeConditionAsync(MediaVisionSource source,
Rectangle bound, FaceRecognitionConfiguration config)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
TaskCompletionSource<EyeCondition> tcs = new TaskCompletionSource<EyeCondition>();
InteropFace.EyeConditionRecognizedCallback cb = (IntPtr sourceHandle, IntPtr engineCfgHandle,
global::Interop.MediaVision.Rectangle faceLocation, EyeCondition eyeCondition, IntPtr _) =>
{
Log.Info(MediaVisionLog.Tag, $"Eye condition recognized, eye condition : {eyeCondition}");
if (!tcs.TrySetResult(eyeCondition))
{
Log.Error(MediaVisionLog.Tag, "Failed to set eye condition result");
}
};
using (var cbKeeper = ObjectKeeper.Get(cb))
{
InteropFace.RecognizeEyeCondition(source.Handle, EngineConfiguration.GetHandle(config),
bound.ToMarshalable(), cb).Validate("Failed to perform eye condition recognition.");
return await tcs.Task;
}
}
/// <summary>
/// Determines facial expression on media source.
/// </summary>
/// <param name="source">The source of the media to recognize facial expression for.</param>
/// <param name="bound">The location bounding the face at the source.</param>
/// <returns>A task that represents the asynchronous recognition operation.</returns>
/// <exception cref="ArgumentNullException"><paramref name="source"/> is null.</exception>
/// <exception cref="ObjectDisposedException"><paramref name="source"/> has already been disposed of.</exception>
/// <exception cref="NotSupportedException">The feature is not supported.</exception>
/// <feature>http://tizen.org/feature/vision.face_recognition</feature>
/// <since_tizen> 4 </since_tizen>
public static async Task<FacialExpression> RecognizeFacialExpressionAsync(MediaVisionSource source,
Rectangle bound)
{
return await RecognizeFacialExpressionAsync(source, bound, null);
}
/// <summary>
/// Determines facial expression on media source.
/// </summary>
/// <param name="source">The source of the media to recognize facial expression for.</param>
/// <param name="bound">The location bounding the face at the source.</param>
/// <param name="config">The configuration used for expression recognition. This value can be null.</param>
/// <returns>A task that represents the asynchronous recognition operation.</returns>
/// <exception cref="ArgumentNullException"><paramref name="source"/> is null.</exception>
/// <exception cref="ObjectDisposedException">
/// <paramref name="source"/> has already been disposed of.<br/>
/// -or-<br/>
/// <paramref name="config"/> has already been disposed of.
/// </exception>
/// <exception cref="NotSupportedException">The feature is not supported.</exception>
/// <feature>http://tizen.org/feature/vision.face_recognition</feature>
/// <since_tizen> 4 </since_tizen>
public static async Task<FacialExpression> RecognizeFacialExpressionAsync(MediaVisionSource source,
Rectangle bound, FaceRecognitionConfiguration config)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
TaskCompletionSource<FacialExpression> tcsResult = new TaskCompletionSource<FacialExpression>();
InteropFace.MvFaceFacialExpressionRecognizedCallback cb = (IntPtr sourceHandle, IntPtr engineCfgHandle,
global::Interop.MediaVision.Rectangle faceLocation, FacialExpression facialExpression, IntPtr _) =>
{
Log.Info(MediaVisionLog.Tag, $"Facial expression recognized, expression : {facialExpression}");
if (!tcsResult.TrySetResult(facialExpression))
{
Log.Error(MediaVisionLog.Tag, "Failed to set facial result");
}
};
using (var cbKeeper = ObjectKeeper.Get(cb))
{
InteropFace.RecognizeFacialExpression(source.Handle, EngineConfiguration.GetHandle(config),
bound.ToMarshalable(), cb).
Validate("Failed to perform facial expression recognition.");
return await tcsResult.Task;
}
}
}
}