CODEWITHSUNDEEP
androidkotlinfirebase-mlkit
nutella_eater
nutella_eater

Reputation: 3582

Read barcode info from bitmap using ML kit

I want to get some info from barcode using my camera. It works when I use png image downloaded from site, but when I try to get it work with a photo I took, it outputs me the empty array. Seems like I need to make some preps with the image in order to make it work. Here is my code:

fun getTheBarCode(bitmap: Bitmap) {
    val options = FirebaseVisionBarcodeDetectorOptions.Builder()
            .setBarcodeFormats(
                    FirebaseVisionBarcode.FORMAT_AZTEC)
            .build()

    val detector = FirebaseVision.getInstance().getVisionBarcodeDetector(options)
    val bm = BitmapFactory.decodeResource(getResources(), R.drawable.barcode) //this is the place where I can load my downloaded barcode to make everything work!
    val newBitmap = Bitmap.createScaledBitmap(bitmap, 300, 500, false)
    val image = FirebaseVisionImage.fromBitmap(newBitmap)

    photoImage.setImageBitmap(newBitmap)

    detector.detectInImage(image)
            .addOnSuccessListener {
                Log.d("Success", "Success")
                //empty array here, when I take picture.
            }
            .addOnFailureListener {
                Log.d("Failed", it.message)
            }
}

This is how I get the image from the camera

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent) {
        super.onActivityResult(requestCode, resultCode, data)
        if (requestCode == CAMERA_REQUEST_CODE && resultCode == Activity.RESULT_OK) {
            val photo = data.extras.get("data") as Bitmap

            getTheBarCode(photo)

        }
    }

Edit:

I've take a picture with my phone, scale it down to 1500x1000px and put it inside my app directory, then loaded it as a bitmap. Still not working.

Upvotes: 2

Views: 1311

Answers (1)

John O'Reilly
John O'Reilly

Reputation: 10330

The approach you're using will only give you back thumbnail of photo (as per https://developer.android.com/training/camera/photobasics) ...that may not be sufficient for what you're trying to do. That link also contains info on how to get access to full size photo.

Upvotes: 1

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