Recognize Barcodes Node

Recognizes Barcodes detected by an AI model in the video stream


The Recognize Barcodes node decodes barcodes detected by an AI model, and adds metadata to the frame metadata.

Suggested use : AI Model Node (with Barcode model) -> Track Objects Node -> Recognize Barcodes Node

Inputs & Outputs

  • Inputs : 1, Media Format : Raw Video
  • Outputs : 1, Media Format: Raw Video
  • Output Metadata : Barcode Information


barcode_typesComma separated list of barcode types to recognize. Empty will search for all types.

preprocessEnables preprocessing to enhance image quality, which might improve detection rates.

none : Disabled
upscale : Upscale detected barcode upscale.sharpen : Upscale + Apply image sharpening. Helps if barcodes are blurry.
upscale.sharpen.rotate : Upscale + Sharpen + Autorotate.
display_info Boolean. If true, detected Barcode info will be drawn on video

Ex. true / false
process_detected_barcodes_onlyEnable to only process barcodes detected by a prior model inference node. Turning off scans entire image for barcodes, and increases processing time but may be useful if the model doesn't detect barcodes well.

Ex. true / false


Metadata PropertyDescription
nodes.<node_id>Describes Barcode information for any decoded barcodes.
Format : as defined in the table below.

<node_id> for Recognize Barcode Nodes is of the form annotate_barcodeX (ex. annotate_barcode1)


"nodes": {
    "annotate_barcode1": {
        "type": "annotate_barcode",
        "barcodes" : [
            "type": "EAN13",
            "data": "124314072131",
            "coords": [104,205,100,300],
            "id": 1203112309710239
            "type": "CODE128",
            "data": "203927812",
            "coords": [410,445,120,340],
            "id": 102397932481
        "barcode_count": 2,
        "barcode_count_delta": 1


barcodesArrayTrue if motion is currently detected, else False
barcodes[].typeEnumType of recognized barcode.
One of the supported barcode_types values.
barcodes[].dataStringContents of the Barcode
barcodes[].coordsArrayWhere in the image the barcode is detected.

Format: [x,y,width,height]
barcodes[].idLong IntegerUnique tracking ID for the detected barcode if a tracker is used and process_detected_barcodes_only is set to True.

Else -1.
barcode_countIntegerNumber of barcodes recognized.
barcode_count_deltaIntegerNumber of new barcodes recognized in this frame.

Objects metadata augmentation

The following information is added to the detected object's "attributes" array:

"class_id" field"label" field"probability" field
10100The recognized barcode result (string)The barcode recognition confidence
10101The recognized barcode type (string)The barcode recognition confidence
"objects": [{
    "id": 5750484150146564100,
    "label": "barcode",
    "class_id": 0,
    "probability": 0.98,
    "rect": {
        "width": 47,
        "top": 201,
        "left": 656,
        "height": 25.
    "attributes": [{
        "label": "124314072131",
        "class_id": 10100,
        "probability": 1.0,
        "label": "EAN13",
        "class_id": 10101,
        "probability": 1.0,