Flood fill (cv::floodFill). From (seed_x, seed_y), replaces the connected region within lo_diff/up_diff color tolerance with new_value and reports the filled mask.

Module：OpenCV segmentation · Task type：opencv_flood_fill

Ports

Inputs

PortTypeRequired
inImage / cv::Mat✓

Outputs

PortTypeRequired
outcv::Mat✓

Parameters

参数类型默认值范围 / 选项说明
seed_xint-1[0, 16384]seed point x
seed_yint-1[0, 16384]seed point y
new_valueint255[0, 255]fill color
lo_difffloat4[0, 255]lower tolerance
up_difffloat4[0, 255]upper tolerance
connectivityenum4C4 / C8

Example graph

A minimal runnable pipeline (read → process → write). Drag it into GraphStudio or open via --open; replace data/test.png with a real path.

{
  "version": "2.0",
  "tasks": [
    {
      "id": "read",
      "type": "opencv_image_read",
      "params": {
        "file_path": "data/test.png"
      }
    },
    {
      "id": "node",
      "type": "opencv_flood_fill",
      "params": {
        "seed_x": -1,
        "seed_y": -1,
        "new_value": 255,
        "lo_diff": 4,
        "up_diff": 4,
        "connectivity": 4
      }
    },
    {
      "id": "save",
      "type": "opencv_image_write",
      "params": {
        "file_path": "out_out.png"
      }
    }
  ],
  "edges": [
    {
      "from": "read",
      "from_port": "out",
      "to": "node",
      "to_port": "in"
    },
    {
      "from": "node",
      "from_port": "out",
      "to": "save",
      "to_port": "in"
    }
  ]
}

Part of the GraphStudio node guide series; parameters reflect the latest release.