Lianja
Lianja
Amazon Rekognition - Detect Faces in an Image
See more Amazon Rekognition Examples
Detects faces within an image that is provided as input. This example passes theimage as base64-encoded image bytes.Chilkat Lianja Downloads
llSuccess = .F.
loRest = createobject("CkRest")
loAuthAws = createobject("CkAuthAws")
loAuthAws.AccessKey = "AWS_ACCESS_KEY"
loAuthAws.SecretKey = "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.)
loAuthAws.Region = "us-west-2"
loAuthAws.ServiceName = "rekognition"
// SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
loRest.SetAuthAws(loAuthAws)
// URL: https://rekognition.us-west-2.amazonaws.com/
llBTls = .T.
lnPort = 443
llBAutoReconnect = .T.
// Don't forget to change the region domain (us-west-2.amazonaws.com) to your particular region.
llSuccess = loRest.Connect("rekognition.us-west-2.amazonaws.com",lnPort,llBTls,llBAutoReconnect)
if (llSuccess <> .T.) then
? "ConnectFailReason: " + str(loRest.ConnectFailReason)
? loRest.LastErrorText
release loRest
release loAuthAws
return
endif
// 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.
loBdJpg = createobject("CkBinData")
llSuccess = loBdJpg.LoadFile("qa_data/jpg/kid_blue_coat.jpg")
if (llSuccess <> .T.) then
? "Failed to load the input JPG file."
release loRest
release loAuthAws
release loBdJpg
return
endif
// 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:
// (image:https://example-code.com/images/kid_blue_coat.jpg/endImage)
// 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.
loSbJpg = createobject("CkStringBuilder")
loBdJpg.GetEncodedSb("base64",loSbJpg)
loJson = createobject("CkJsonObject")
loJson.UpdateSb("Image.Bytes",loSbJpg)
loJson.UpdateString("Attributes[0]","ALL")
loRest.AddHeader("Content-Type","application/x-amz-json-1.1")
loRest.AddHeader("X-Amz-Target","RekognitionService.DetectFaces")
loSbRequestBody = createobject("CkStringBuilder")
loJson.EmitSb(loSbRequestBody)
loSbResponseBody = createobject("CkStringBuilder")
llSuccess = loRest.FullRequestSb("POST","/",loSbRequestBody,loSbResponseBody)
if (llSuccess <> .T.) then
? loRest.LastErrorText
release loRest
release loAuthAws
release loBdJpg
release loSbJpg
release loJson
release loSbRequestBody
release loSbResponseBody
return
endif
lnRespStatusCode = loRest.ResponseStatusCode
? "response status code = " + str(lnRespStatusCode)
if (lnRespStatusCode >= 400) then
? "Response Status Code = " + str(lnRespStatusCode)
? "Response Header:"
? loRest.ResponseHeader
? "Response Body:"
? loSbResponseBody.GetAsString()
release loRest
release loAuthAws
release loBdJpg
release loSbJpg
release loJson
release loSbRequestBody
release loSbResponseBody
return
endif
loJResp = createobject("CkJsonObject")
loJResp.LoadSb(loSbResponseBody)
loJResp.EmitCompact = .F.
? loJResp.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
i = 0
lnCount_i = loJResp.SizeOfArray("FaceDetails")
do while i < lnCount_i
loJResp.I = i
lnAgeRangeHigh = loJResp.IntOf("FaceDetails[i].AgeRange.High")
lnAgeRangeLow = loJResp.IntOf("FaceDetails[i].AgeRange.Low")
lcBeardConfidence = loJResp.StringOf("FaceDetails[i].Beard.Confidence")
llBeardValue = loJResp.BoolOf("FaceDetails[i].Beard.Value")
lcBoundingBoxHeight = loJResp.StringOf("FaceDetails[i].BoundingBox.Height")
lcBoundingBoxLeft = loJResp.StringOf("FaceDetails[i].BoundingBox.Left")
lcBoundingBoxTop = loJResp.StringOf("FaceDetails[i].BoundingBox.Top")
lcBoundingBoxWidth = loJResp.StringOf("FaceDetails[i].BoundingBox.Width")
lcConfidence = loJResp.StringOf("FaceDetails[i].Confidence")
lcEyeglassesConfidence = loJResp.StringOf("FaceDetails[i].Eyeglasses.Confidence")
llEyeglassesValue = loJResp.BoolOf("FaceDetails[i].Eyeglasses.Value")
lcEyesOpenConfidence = loJResp.StringOf("FaceDetails[i].EyesOpen.Confidence")
llEyesOpenValue = loJResp.BoolOf("FaceDetails[i].EyesOpen.Value")
lcGenderConfidence = loJResp.StringOf("FaceDetails[i].Gender.Confidence")
lcGenderValue = loJResp.StringOf("FaceDetails[i].Gender.Value")
lcMouthOpenConfidence = loJResp.StringOf("FaceDetails[i].MouthOpen.Confidence")
llMouthOpenValue = loJResp.BoolOf("FaceDetails[i].MouthOpen.Value")
lcMustacheConfidence = loJResp.StringOf("FaceDetails[i].Mustache.Confidence")
llMustacheValue = loJResp.BoolOf("FaceDetails[i].Mustache.Value")
lcPosePitch = loJResp.StringOf("FaceDetails[i].Pose.Pitch")
lcPoseRoll = loJResp.StringOf("FaceDetails[i].Pose.Roll")
lcPoseYaw = loJResp.StringOf("FaceDetails[i].Pose.Yaw")
lcQualityBrightness = loJResp.StringOf("FaceDetails[i].Quality.Brightness")
lcQualitySharpness = loJResp.StringOf("FaceDetails[i].Quality.Sharpness")
lcSmileConfidence = loJResp.StringOf("FaceDetails[i].Smile.Confidence")
llSmileValue = loJResp.BoolOf("FaceDetails[i].Smile.Value")
lcSunglassesConfidence = loJResp.StringOf("FaceDetails[i].Sunglasses.Confidence")
llSunglassesValue = loJResp.BoolOf("FaceDetails[i].Sunglasses.Value")
j = 0
lnCount_j = loJResp.SizeOfArray("FaceDetails[i].Emotions")
do while j < lnCount_j
loJResp.J = j
lcConfidence = loJResp.StringOf("FaceDetails[i].Emotions[j].Confidence")
lcV_Type = loJResp.StringOf("FaceDetails[i].Emotions[j].Type")
j = j + 1
enddo
j = 0
lnCount_j = loJResp.SizeOfArray("FaceDetails[i].Landmarks")
do while j < lnCount_j
loJResp.J = j
lcV_Type = loJResp.StringOf("FaceDetails[i].Landmarks[j].Type")
X = loJResp.StringOf("FaceDetails[i].Landmarks[j].X")
Y = loJResp.StringOf("FaceDetails[i].Landmarks[j].Y")
j = j + 1
enddo
i = i + 1
enddo
release loRest
release loAuthAws
release loBdJpg
release loSbJpg
release loJson
release loSbRequestBody
release loSbResponseBody
release loJResp