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We successfully finish receiving video from the drone camera and streaming it on the webcam.

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In this lesson we will be creating the face recognition part.

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First I want you to go to the tools folder where we set the hard cascade example.

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Right click on the file and copy this next go pasted in the model's folder and press OK.

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You can see that the hard cascade excel file has been set under the model's folder.

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Now go to the drone manager p y will be using the excel file to create the face recognition function.

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Let's start by setting the example path on the top set face detect XM alpha with Slash drone app slash

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models slash since the file name is long let's right click on the Excel file choose refactor and rename

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once you see the file name.

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Copy that and paste it to the path.

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Next we want to receive an error.

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If the example file doesn't exist so let's set a class named error.

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No face deduct XM Alpha as an exception followed by a message.

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Error no phase detect XM Alpha.

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Here I said exception class to be inherited with the straightforward class name so we can easily detect

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what the area is now scroll down to send command.

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We can also add if not statement.

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If not the OS path exist for the XM Alpha raisin error with the message that there is no XM Alpha.

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Let's go on and set self face cascade to see V cascade classifier and set the XM Alpha.

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We also want to set a flag to determine if we will enable the face detection or not.

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Initially we will set to false.

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Now scroll down so we can add some codes to the video method.

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Here we see the video JPEG generator will add the face detection method in here before we go into the

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face detection.

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We need to enable the face detection set that is enable face detect to true.

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Also let's add a disabled face to tech method so we can switch off the face detect.

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Here we need to set the self is enable face deductibles.

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Now let's go onto the video JPEG generator go into the video binary generator and add an if statement.

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If the face detectors enable if the patrol is on we need to stop the patrol.

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We've done this part in the open CV but we'll set it again.

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Grey will be set with CV CBT color first argument with the frame followed by CV color BGR to Gray next

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faces will be set to sell face cascade detect multi scale and the color gray followed by one point three

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and five which was determined in the sample code.

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If the face was detected we need to get the x y point width and height to set and faces

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once the face is detected we want to enclose it with the square.

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So we set the CV rectangle function and set the frame with x y x plus width and Y plus height followed

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by the color blue which will be 2 5 5.

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Come on 0 come on 0.

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The line thickness will be 2.

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In this example we will detect just one face.

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So once a face is detected we will break the for loop.

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Next go to server P Why go to where the patrol command is under the stop patrol command.

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Let's set the face detect.

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Command this command will be faced detect and track command.

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We still haven't set the tracking method but we'll get to it later on set to run drone enable face detect.

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Copy this command to create the stop face detect and track set to run drone disable face detect

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once we set the server IP why.

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Let's go to the controller HDMI out go to the events mode and copy the stop patrol button code and paste

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to twice change the button word to face detect and track and stop face detect and track.

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Remember to change the content to face detect and track and stop face detect and track

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now we've finished the code.

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So let's run the script and go for a test fly.

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Once we run the code go to the controller site let's press take off and wait until the video stream

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starts

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you can see that the camera is too low so I'll press on up to fly the drone so the height of my face

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once the camera fits my face I'll press the face detect and track button.

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Let me turn around so you can see the blue rectangles set on my face.

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I can move my face around and the rectangle will follow me.

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We've succeeded in setting the face detect function to our system.

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Now let's hit the stop phase detect and track button.

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I'm going to turn around again this time.

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You can see that the blue rectangle doesn't show up as the face detectors disabled press the land button

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to finish the process.

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Okay.

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Great job.

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Next we will go on to setting the tracking part see at the next lesson.