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(Go) Amazon Rekognition - Detect Faces in an Image
Detects faces within an image that is provided as input. This example passes theimage as base64-encoded image bytes. For more information, see https://docs.aws.amazon.com/rekognition/latest/dg/API_DetectFaces.html
rest := chilkat.NewRest()
var success bool
authAws := chilkat.NewAuthAws()
authAws.SetAccessKey("AWS_ACCESS_KEY")
authAws.SetSecretKey("AWS_SECRET_KEY")
// Don't forget to change the region to your particular region. (Also make the same change in the call to Connect below.)
authAws.SetRegion("us-west-2")
authAws.SetServiceName("rekognition")
// SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
rest.SetAuthAws(authAws)
// URL: https://rekognition.us-west-2.amazonaws.com/
bTls := true
port := 443
bAutoReconnect := true
// Don't forget to change the region domain (us-west-2.amazonaws.com) to your particular region.
success = rest.Connect("rekognition.us-west-2.amazonaws.com",port,bTls,bAutoReconnect)
if success != true {
fmt.Println("ConnectFailReason: ", rest.ConnectFailReason())
fmt.Println(rest.LastErrorText())
rest.DisposeRest()
authAws.DisposeAuthAws()
return
}
// Note: The above code does not need to be repeatedly called for each REST request.
// The rest object can be setup once, and then many requests can be sent. Chilkat will automatically
// reconnect within a FullRequest* method as needed. It is only the very first connection that is explicitly
// made via the Connect method.
// Load the JPG to be passed as base64 in the JSON.
bdJpg := chilkat.NewBinData()
success = bdJpg.LoadFile("qa_data/jpg/kid_blue_coat.jpg")
if success != true {
fmt.Println("Failed to load the input JPG file.")
rest.DisposeRest()
authAws.DisposeAuthAws()
bdJpg.DisposeBinData()
return
}
// We wish to send the following JSON in the body of our HTTP request:
// {
// "Image": {
// "Bytes": "base64_image_bytes"
// }
// "Attributes": [
// "ALL"
// ]
// }
// Here is the image we used for testing:
// Convert binary image bytes to base64.
// Note: We are explicitly keeping the data inside Chilkat to avoid having to pass large strings
// as arguments to function calls. This is important for some programming languages.
sbJpg := chilkat.NewStringBuilder()
bdJpg.GetEncodedSb("base64",sbJpg)
json := chilkat.NewJsonObject()
json.UpdateSb("Image.Bytes",sbJpg)
json.UpdateString("Attributes[0]","ALL")
rest.AddHeader("Content-Type","application/x-amz-json-1.1")
rest.AddHeader("X-Amz-Target","RekognitionService.DetectFaces")
sbRequestBody := chilkat.NewStringBuilder()
json.EmitSb(sbRequestBody)
sbResponseBody := chilkat.NewStringBuilder()
success = rest.FullRequestSb("POST","/",sbRequestBody,sbResponseBody)
if success != true {
fmt.Println(rest.LastErrorText())
rest.DisposeRest()
authAws.DisposeAuthAws()
bdJpg.DisposeBinData()
sbJpg.DisposeStringBuilder()
json.DisposeJsonObject()
sbRequestBody.DisposeStringBuilder()
sbResponseBody.DisposeStringBuilder()
return
}
respStatusCode := rest.ResponseStatusCode()
fmt.Println("response status code = ", respStatusCode)
if respStatusCode >= 400 {
fmt.Println("Response Status Code = ", respStatusCode)
fmt.Println("Response Header:")
fmt.Println(rest.ResponseHeader())
fmt.Println("Response Body:")
fmt.Println(*sbResponseBody.GetAsString())
rest.DisposeRest()
authAws.DisposeAuthAws()
bdJpg.DisposeBinData()
sbJpg.DisposeStringBuilder()
json.DisposeJsonObject()
sbRequestBody.DisposeStringBuilder()
sbResponseBody.DisposeStringBuilder()
return
}
jResp := chilkat.NewJsonObject()
jResp.LoadSb(sbResponseBody)
jResp.SetEmitCompact(false)
fmt.Println(*jResp.Emit())
// Sample JSON response:
// (Sample code for parsing the JSON response is shown below)
// {
// "FaceDetails": [
// {
// "AgeRange": {
// "High": 18,
// "Low": 8
// },
// "Beard": {
// "Confidence": 98.06282806396484,
// "Value": false
// },
// "BoundingBox": {
// "Height": 0.327279269695282,
// "Left": 0.5339247584342957,
// "Top": 0.23660442233085632,
// "Width": 0.35611653327941895
// },
// "Confidence": 99.99732971191406,
// "Emotions": [
// {
// "Confidence": 99.5849380493164,
// "Type": "HAPPY"
// },
// {
// "Confidence": 0.15533843636512756,
// "Type": "CALM"
// },
// {
// "Confidence": 0.08864031732082367,
// "Type": "SURPRISED"
// },
// {
// "Confidence": 0.05476664379239082,
// "Type": "SAD"
// },
// {
// "Confidence": 0.042048510164022446,
// "Type": "CONFUSED"
// },
// {
// "Confidence": 0.038942769169807434,
// "Type": "DISGUSTED"
// },
// {
// "Confidence": 0.021463459357619286,
// "Type": "FEAR"
// },
// {
// "Confidence": 0.013858155347406864,
// "Type": "ANGRY"
// }
// ],
// "Eyeglasses": {
// "Confidence": 98.5116195678711,
// "Value": false
// },
// "EyesOpen": {
// "Confidence": 99.65477752685547,
// "Value": true
// },
// "Gender": {
// "Confidence": 97.1164321899414,
// "Value": "Female"
// },
// "Landmarks": [
// {
// "Type": "eyeLeft",
// "X": 0.6554790735244751,
// "Y": 0.35153862833976746
// },
// {
// "Type": "eyeRight",
// "X": 0.7940073609352112,
// "Y": 0.38292214274406433
// },
// {
// "Type": "mouthLeft",
// "X": 0.6188991069793701,
// "Y": 0.46431097388267517
// },
// {
// "Type": "mouthRight",
// "X": 0.7352844476699829,
// "Y": 0.490242063999176
// },
// {
// "Type": "nose",
// "X": 0.7125006914138794,
// "Y": 0.44607019424438477
// },
// {
// "Type": "leftEyeBrowLeft",
// "X": 0.6096581220626831,
// "Y": 0.3071737587451935
// },
// {
// "Type": "leftEyeBrowRight",
// "X": 0.6628581285476685,
// "Y": 0.3133310079574585
// },
// {
// "Type": "leftEyeBrowUp",
// "X": 0.7027584314346313,
// "Y": 0.33200803399086
// },
// {
// "Type": "rightEyeBrowLeft",
// "X": 0.7813941240310669,
// "Y": 0.35023579001426697
// },
// {
// "Type": "rightEyeBrowRight",
// "X": 0.8213478922843933,
// "Y": 0.34993964433670044
// },
// {
// "Type": "rightEyeBrowUp",
// "X": 0.8495538234710693,
// "Y": 0.36189284920692444
// },
// {
// "Type": "leftEyeLeft",
// "X": 0.629088282585144,
// "Y": 0.34286588430404663
// },
// {
// "Type": "leftEyeRight",
// "X": 0.6820939183235168,
// "Y": 0.3586524724960327
// },
// {
// "Type": "leftEyeUp",
// "X": 0.6580297946929932,
// "Y": 0.3468707501888275
// },
// {
// "Type": "leftEyeDown",
// "X": 0.6537532210350037,
// "Y": 0.35663917660713196
// },
// {
// "Type": "rightEyeLeft",
// "X": 0.7655976414680481,
// "Y": 0.3776427209377289
// },
// {
// "Type": "rightEyeRight",
// "X": 0.8166338801383972,
// "Y": 0.38544225692749023
// },
// {
// "Type": "rightEyeUp",
// "X": 0.7969376444816589,
// "Y": 0.37844377756118774
// },
// {
// "Type": "rightEyeDown",
// "X": 0.7909533977508545,
// "Y": 0.3877102732658386
// },
// {
// "Type": "noseLeft",
// "X": 0.6727234721183777,
// "Y": 0.44030481576919556
// },
// {
// "Type": "noseRight",
// "X": 0.7237889170646667,
// "Y": 0.45200300216674805
// },
// {
// "Type": "mouthUp",
// "X": 0.6882695555686951,
// "Y": 0.4740942418575287
// },
// {
// "Type": "mouthDown",
// "X": 0.6720560789108276,
// "Y": 0.5046101808547974
// },
// {
// "Type": "leftPupil",
// "X": 0.6554790735244751,
// "Y": 0.35153862833976746
// },
// {
// "Type": "rightPupil",
// "X": 0.7940073609352112,
// "Y": 0.38292214274406433
// },
// {
// "Type": "upperJawlineLeft",
// "X": 0.5517005324363708,
// "Y": 0.30355724692344666
// },
// {
// "Type": "midJawlineLeft",
// "X": 0.5320234894752502,
// "Y": 0.43352627754211426
// },
// {
// "Type": "chinBottom",
// "X": 0.6419994831085205,
// "Y": 0.5531964302062988
// },
// {
// "Type": "midJawlineRight",
// "X": 0.7752369046211243,
// "Y": 0.48957017064094543
// },
// {
// "Type": "upperJawlineRight",
// "X": 0.8515444397926331,
// "Y": 0.37258899211883545
// }
// ],
// "MouthOpen": {
// "Confidence": 68.26280212402344,
// "Value": false
// },
// "Mustache": {
// "Confidence": 99.73213195800781,
// "Value": false
// },
// "Pose": {
// "Pitch": -11.299633026123047,
// "Roll": 17.6924991607666,
// "Yaw": 13.582314491271973
// },
// "Quality": {
// "Brightness": 83.72581481933594,
// "Sharpness": 67.22731018066406
// },
// "Smile": {
// "Confidence": 98.4793930053711,
// "Value": true
// },
// "Sunglasses": {
// "Confidence": 99.3582992553711,
// "Value": false
// }
// }
// ]
// }
// Sample code for parsing the JSON response...
// Use the following online tool to generate parsing code from sample JSON:
// Generate Parsing Code from JSON
var AgeRangeHigh int
var AgeRangeLow int
Beard var Confidence *string = new(string)
var BeardValue bool
var BoundingBoxHeight *string = new(string)
var BoundingBoxLeft *string = new(string)
var BoundingBoxTop *string = new(string)
var BoundingBoxWidth *string = new(string)
var Confidence *string = new(string)
var EyeglassesConfidence *string = new(string)
var EyeglassesValue bool
EyesOpen var Confidence *string = new(string)
var EyesOpenValue bool
Gender var Confidence *string = new(string)
var GenderValue *string = new(string)
MouthOpen var Confidence *string = new(string)
var MouthOpenValue bool
var MustacheConfidence *string = new(string)
var MustacheValue bool
var PosePitch *string = new(string)
var PoseRoll *string = new(string)
var PoseYaw *string = new(string)
var QualityBrightness *string = new(string)
var QualitySharpness *string = new(string)
Smile var Confidence *string = new(string)
var SmileValue bool
Sunglasses var Confidence *string = new(string)
var SunglassesValue bool
var j int
var count_j int
var v_Type *string = new(string)
var X *string = new(string)
var Y *string = new(string)
i := 0
count_i := jResp.SizeOfArray("FaceDetails")
for i < count_i {
jResp.SetI(i)
AgeRangeHigh = jResp.IntOf("FaceDetails[i].AgeRange.High")
AgeRangeLow = jResp.IntOf("FaceDetails[i].AgeRange.Low")
BeardConfidence = jResp.StringOf("FaceDetails[i].Beard.Confidence")
BeardValue = jResp.BoolOf("FaceDetails[i].Beard.Value")
BoundingBoxHeight = jResp.StringOf("FaceDetails[i].BoundingBox.Height")
BoundingBoxLeft = jResp.StringOf("FaceDetails[i].BoundingBox.Left")
BoundingBoxTop = jResp.StringOf("FaceDetails[i].BoundingBox.Top")
BoundingBoxWidth = jResp.StringOf("FaceDetails[i].BoundingBox.Width")
Confidence = jResp.StringOf("FaceDetails[i].Confidence")
EyeglassesConfidence = jResp.StringOf("FaceDetails[i].Eyeglasses.Confidence")
EyeglassesValue = jResp.BoolOf("FaceDetails[i].Eyeglasses.Value")
EyesOpenConfidence = jResp.StringOf("FaceDetails[i].EyesOpen.Confidence")
EyesOpenValue = jResp.BoolOf("FaceDetails[i].EyesOpen.Value")
GenderConfidence = jResp.StringOf("FaceDetails[i].Gender.Confidence")
GenderValue = jResp.StringOf("FaceDetails[i].Gender.Value")
MouthOpenConfidence = jResp.StringOf("FaceDetails[i].MouthOpen.Confidence")
MouthOpenValue = jResp.BoolOf("FaceDetails[i].MouthOpen.Value")
MustacheConfidence = jResp.StringOf("FaceDetails[i].Mustache.Confidence")
MustacheValue = jResp.BoolOf("FaceDetails[i].Mustache.Value")
PosePitch = jResp.StringOf("FaceDetails[i].Pose.Pitch")
PoseRoll = jResp.StringOf("FaceDetails[i].Pose.Roll")
PoseYaw = jResp.StringOf("FaceDetails[i].Pose.Yaw")
QualityBrightness = jResp.StringOf("FaceDetails[i].Quality.Brightness")
QualitySharpness = jResp.StringOf("FaceDetails[i].Quality.Sharpness")
SmileConfidence = jResp.StringOf("FaceDetails[i].Smile.Confidence")
SmileValue = jResp.BoolOf("FaceDetails[i].Smile.Value")
SunglassesConfidence = jResp.StringOf("FaceDetails[i].Sunglasses.Confidence")
SunglassesValue = jResp.BoolOf("FaceDetails[i].Sunglasses.Value")
j = 0
count_j = jResp.SizeOfArray("FaceDetails[i].Emotions")
for j < count_j {
jResp.SetJ(j)
Confidence = jResp.StringOf("FaceDetails[i].Emotions[j].Confidence")
v_Type = jResp.StringOf("FaceDetails[i].Emotions[j].Type")
j = j + 1
}
j = 0
count_j = jResp.SizeOfArray("FaceDetails[i].Landmarks")
for j < count_j {
jResp.SetJ(j)
v_Type = jResp.StringOf("FaceDetails[i].Landmarks[j].Type")
X = jResp.StringOf("FaceDetails[i].Landmarks[j].X")
Y = jResp.StringOf("FaceDetails[i].Landmarks[j].Y")
j = j + 1
}
i = i + 1
}
rest.DisposeRest()
authAws.DisposeAuthAws()
bdJpg.DisposeBinData()
sbJpg.DisposeStringBuilder()
json.DisposeJsonObject()
sbRequestBody.DisposeStringBuilder()
sbResponseBody.DisposeStringBuilder()
jResp.DisposeJsonObject()
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