dora-opencv-image-splitter

A dora-rs node to split one image into multiple images.

Usage

Inputs

ID	Type	Metadata	Description
image	UInt8 Arrow array	encoding, width, height	Raw image as a flat array of shape H × W × channels

Supported encodings: bgr8, rgb8, jpeg, jpg, jpe, bmp, webp, png.

Outputs

The outputs are dynamically named by index: image_0, image_1, ..., image_N-1.

ID	Type	Metadata	Description
image_N	UInt8 Arrow array	encoding, width, height	JPEG-encoded sub-image cropped from the input image

Each output carries the same metadata as the input, with encoding set to "jpeg" and width/height updated to the sub-image dimensions.

Configuration

The node can be configured via environment variables or command-line arguments:

Environment variable	CLI argument	Default	Description
SPLIT_MODE	--split-mode	"vertical"	Split strategy: "horizontal" (rows), "vertical" (columns), or "bbox"
NUM_SPLITS	--num-splits	2	Number of equal splits for horizontal/vertical mode
JPEG_QUALITY	--jpeg-quality	90	JPEG quality for output encoding, 0–100
IMAGE_WIDTH	--image-width	640	Fallback image width when metadata is absent
IMAGE_HEIGHT	--image-height	480	Fallback image height when metadata is absent
IMAGE_ENCODING	--image-encoding	(none)	Fallback image encoding when metadata is absent
BBOXES	--bboxes	(none)	Bounding boxes for bbox mode as a flat list: x1 y1 x2 y2 ...

Example dataflow

See example/dataflow.yaml for an example that splits a camera image into two vertical halves and displays each half separately.

License

Licensed under the Apache License 2.0. See LICENSE for details.

Copyright 2026 Enactic, Inc.

Code of Conduct

All participation in the OpenArm project is governed by our Code of Conduct.