Linear blend (cv::addWeighted): out = alpha·in + beta·in2 + gamma. Two input ports; typical for exposure blending, watermark overlays and animated transitions.

Module：OpenCV enhancement · Task type：opencv_add_weighted

Ports

Inputs

PortTypeRequired
in1Image / cv::Mat✓
in2Image / cv::Mat✓

Outputs

PortTypeRequired
outcv::Mat✓

Parameters

参数类型默认值范围 / 选项说明
alphafloat0.5[-10, 10]weight of the first input
betafloat0.5[-10, 10]weight of the second input
gammafloat0[-255, 255]additive offset

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": "read1",
      "type": "opencv_image_read",
      "params": {
        "file_path": "data/test.png"
      }
    },
    {
      "id": "read2",
      "type": "opencv_image_read",
      "params": {
        "file_path": "data/test.png"
      }
    },
    {
      "id": "node",
      "type": "opencv_add_weighted",
      "params": {
        "alpha": 0.5,
        "beta": 0.5,
        "gamma": 0
      }
    },
    {
      "id": "save",
      "type": "opencv_image_write",
      "params": {
        "file_path": "out_out.png"
      }
    }
  ],
  "edges": [
    {
      "from": "read1",
      "from_port": "out",
      "to": "node",
      "to_port": "in1"
    },
    {
      "from": "read2",
      "from_port": "out",
      "to": "node",
      "to_port": "in2"
    },
    {
      "from": "node",
      "from_port": "out",
      "to": "save",
      "to_port": "in"
    }
  ]
}

Notes

  • Both inputs need identical size and channel count.

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