Test Grayscale Jpeg

{
  "actions": [
    {
      "action": "configure",
      "streams": [
        {
          "sources": [
            {
              "source": "any",
              "pixelFormats": [
                {
                  "pixelFormat": "gray8",
                  "attributes": [
                    {
                      "attribute": "compression",
                      "values": [
                        {
                          "value": "jpeg"
                        }
                      ]
                    },
                    {
                      "attribute": "resolution",
                      "values": [
                        {
                          "value": 150
                        },
                        {
                          "value": 300
                        },
                        {
                          "value": 600
                        }
                      ]
                    },
                    {
                      "attribute": "imagecount",
                      "values": [
                        {
                          "value": 2
                        }
                      ]
                    }
                  ]
                }
              ]
            }
          ]
        }
      ]
    },
    {
      "action": "scan"
    }
  ]
}