First Non Empty Or Default

Class: FirstNonEmptyOrDefaultBlockV1

Source: inference.core.workflows.core_steps.formatters.first_non_empty_or_default.v1.FirstNonEmptyOrDefaultBlockV1

Takes input data which may not be present due to filtering or conditional execution and fills with default value to make it compliant with further processing.

Type identifier

Use the following identifier in step "type" field: roboflow_core/first_non_empty_or_default@v1to add the block as as step in your workflow.

Properties

Name	Type	Description	Refs
name	str	Enter a unique identifier for this step..	❌
default	Any	Default value that will be placed whenever there is no data found.	❌

The Refs column marks possibility to parametrise the property with dynamic values available in workflow runtime. See Bindings for more info.

Available Connections

Compatible Blocks

Check what blocks you can connect to First Non Empty Or Default in version v1.

• inputs: Llama 3.2 Vision, SAM 3, Polygon Zone Visualization, Distance Measurement, Pixelate Visualization, Roboflow Custom Metadata, Trace Visualization, QR Code Detection, Detections Transformation, Image Threshold, Rate Limiter, Image Slicer, Icon Visualization, Stability AI Outpainting, Dynamic Zone, Clip Comparison, Model Comparison Visualization, Single-Label Classification Model, Cache Get, Stitch Images, Size Measurement, Florence-2 Model, Single-Label Classification Model, Environment Secrets Store, Relative Static Crop, Absolute Static Crop, SIFT Comparison, SAM 3, Moondream2, Florence-2 Model, LMM For Classification, Anthropic Claude, Image Blur, Stability AI Image Generation, Camera Calibration, Local File Sink, Keypoint Detection Model, VLM as Detector, First Non Empty Or Default, Detections Filter, Gaze Detection, Background Color Visualization, Keypoint Detection Model, Delta Filter, Multi-Label Classification Model, Google Gemini, Model Monitoring Inference Aggregator, Roboflow Dataset Upload, Byte Tracker, Instance Segmentation Model, VLM as Classifier, CSV Formatter, Motion Detection, Morphological Transformation, Data Aggregator, OpenAI, Barcode Detection, YOLO-World Model, JSON Parser, Clip Comparison, CogVLM, Expression, Identify Changes, CLIP Embedding Model, Path Deviation, Crop Visualization, Grid Visualization, Buffer, Bounding Rectangle, SIFT, SAM 3, Anthropic Claude, Time in Zone, Detection Offset, Qwen2.5-VL, SIFT Comparison, OpenAI, Line Counter, Detections Consensus, Cosine Similarity, Path Deviation, Blur Visualization, Perception Encoder Embedding Model, Dimension Collapse, Perspective Correction, Bounding Box Visualization, QR Code Generator, Velocity, Segment Anything 2 Model, Polygon Visualization, Dynamic Crop, Identify Outliers, LMM, OpenAI, Classification Label Visualization, Mask Visualization, Time in Zone, Google Gemini, Circle Visualization, Ellipse Visualization, Image Convert Grayscale, Time in Zone, Object Detection Model, OCR Model, SmolVLM2, Image Preprocessing, Color Visualization, Google Vision OCR, Keypoint Visualization, EasyOCR, Image Slicer, Property Definition, Line Counter, VLM as Detector, Email Notification, Detections Combine, Byte Tracker, Roboflow Dataset Upload, Overlap Filter, Triangle Visualization, Slack Notification, Halo Visualization, Detections Stabilizer, Corner Visualization, Object Detection Model, Dot Visualization, Image Contours, Detections Merge, Multi-Label Classification Model, Twilio SMS Notification, Seg Preview, Reference Path Visualization, Byte Tracker, Webhook Sink, PTZ Tracking (ONVIF).md), Detections Classes Replacement, Instance Segmentation Model, Detections Stitch, Contrast Equalization, Camera Focus, Stitch OCR Detections, Stability AI Inpainting, Line Counter Visualization, Cache Set, Template Matching, Email Notification, VLM as Classifier, OpenAI, Depth Estimation, Continue If, Background Subtraction, Label Visualization, Pixel Color Count, Dominant Color
• outputs: Llama 3.2 Vision, SAM 3, Polygon Zone Visualization, Distance Measurement, Pixelate Visualization, Trace Visualization, Roboflow Custom Metadata, QR Code Detection, Detections Transformation, Image Threshold, Rate Limiter, Image Slicer, Icon Visualization, Stability AI Outpainting, Model Comparison Visualization, Single-Label Classification Model, Dynamic Zone, Clip Comparison, Stitch Images, Cache Get, Size Measurement, Florence-2 Model, Single-Label Classification Model, Relative Static Crop, SIFT Comparison, SAM 3, Absolute Static Crop, Moondream2, Florence-2 Model, LMM For Classification, Anthropic Claude, Image Blur, Stability AI Image Generation, VLM as Detector, Camera Calibration, Keypoint Detection Model, Local File Sink, First Non Empty Or Default, Detections Filter, Gaze Detection, Background Color Visualization, Keypoint Detection Model, Delta Filter, Multi-Label Classification Model, Google Gemini, Model Monitoring Inference Aggregator, Roboflow Dataset Upload, Byte Tracker, Instance Segmentation Model, VLM as Classifier, CSV Formatter, Motion Detection, Morphological Transformation, Data Aggregator, OpenAI, Barcode Detection, YOLO-World Model, JSON Parser, CogVLM, Clip Comparison, Expression, Identify Changes, Path Deviation, CLIP Embedding Model, Crop Visualization, Grid Visualization, Buffer, Bounding Rectangle, SIFT, SAM 3, Anthropic Claude, Time in Zone, Detection Offset, Qwen2.5-VL, SIFT Comparison, OpenAI, Line Counter, Path Deviation, Detections Consensus, Cosine Similarity, Perception Encoder Embedding Model, Blur Visualization, Dimension Collapse, Perspective Correction, Bounding Box Visualization, QR Code Generator, Velocity, Segment Anything 2 Model, Polygon Visualization, Dynamic Crop, Identify Outliers, LMM, OpenAI, Classification Label Visualization, Mask Visualization, Time in Zone, Google Gemini, Circle Visualization, Ellipse Visualization, Time in Zone, Image Convert Grayscale, Object Detection Model, OCR Model, SmolVLM2, Image Preprocessing, Color Visualization, Google Vision OCR, Keypoint Visualization, EasyOCR, Image Slicer, Line Counter, Email Notification, VLM as Detector, Property Definition, Detections Combine, Byte Tracker, Overlap Filter, Roboflow Dataset Upload, Triangle Visualization, Slack Notification, Halo Visualization, Detections Stabilizer, Corner Visualization, Object Detection Model, Dot Visualization, Image Contours, Twilio SMS Notification, Detections Merge, Multi-Label Classification Model, Seg Preview, Reference Path Visualization, Byte Tracker, Webhook Sink, PTZ Tracking (ONVIF).md), Detections Classes Replacement, Instance Segmentation Model, Detections Stitch, Contrast Equalization, Camera Focus, Stitch OCR Detections, Stability AI Inpainting, Line Counter Visualization, Cache Set, Template Matching, Email Notification, VLM as Classifier, OpenAI, Background Subtraction, Depth Estimation, Continue If, Pixel Color Count, Label Visualization, Dominant Color

Input and Output Bindings

The available connections depend on its binding kinds. Check what binding kinds First Non Empty Or Default in version v1 has.

Bindings

• input

  • data (*): Reference data to replace empty values.

• output

  • output (*): Equivalent of any element.

Example JSON definition of step First Non Empty Or Default in version v1

{
    "name": "<your_step_name_here>",
    "type": "roboflow_core/first_non_empty_or_default@v1",
    "data": "$steps.my_step.predictions",
    "default": "empty"
}