Bilateral filter (cv::bilateralFilter). sigma_color decides how large a color difference still counts as the same color; sigma_space sets the spatial reach — together they set the smoothing strength. A staple for skin smoothing and cartoon-like preprocessing.

Module：OpenCV filtering · Task type：opencv_bilateral_filter

Ports

Inputs

PortTypeRequired
inImage / cv::Mat✓

Outputs

PortTypeRequired
outcv::Mat✓

Parameters

参数类型默认值范围 / 选项说明
dint9[1, 50]
sigma_colorfloat75[0, 300]color-space filter strength (larger = wider color ranges are averaged)
sigma_spacefloat75[0, 300]coordinate-space filter strength (larger = farther pixels influence each other)

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_bilateral_filter",
      "params": {
        "d": 9,
        "sigma_color": 75,
        "sigma_space": 75
      }
    },
    {
      "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.