I want to detect images taken with a camera with FaceAPI.

Question

I am implementing it in kotlin.

I want to detect the captured image taken by the camera with FaceAPI.
I'm using Detect With Stream, but I'm getting an "image format unsupported" error.

Please tell me how to use Detect With Stream.

//Convert the captured image to Bitmap.
var imageUri = intent.getParcelableExtra<Uri>("image")
val imageBitmap: Bitmap? = decodeUriToBitmap(imageUri)

//Convert imageBitmap to ByteArrayOutputStream.
val baos = ByteArrayOutputStream()
val compress = imageBitmap!!.compress(Bitmap.CompressFormat.PNG, 100, baos)

//Run Detect With Stream.
val faceId = FaceApi.detectWithStream("""{"""+baos+"""}""")    
	?:return@launch
	


URI Parameters
Endpoint:"endpoint"/detect

Request Header
Ocp-Apim-Subscription-Key："SUBSCRIPTION_KEY"

Request Body
Media Types: "application/octet-stream"
image:{"baos"}  // baos:ByteArrayOutputStream

Answer 1

笹岡　愛 As per the REST API reference, I think the image binary should be in base 64 format.

I do not have experience in using kotlin or bitmap images, but I found a reference of this conversion in Java from this page on internet.

val baos = ByteArrayOutputStream()
val compress = imageBitmap!!.compress(Bitmap.CompressFormat.PNG, 100, baos)

byte[] bytes=baos.toByteArray();
sImage= Base64.encodeToString(bytes,Base64.DEFAULT);

val faceId = FaceApi.detectWithStream(sImage)

?:return@launch

The above syntax may be incorrect but I think if you use it base64 format the API should detect the stream data as valid.

Ref: https://www.geeksforgeeks.org/how-to-encode-and-decode-image-in-base64-in-android/

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