mxpi_channelimagesstitcher

Function	Combines multiple images into a large image, dynamically outputs the preprocessing information of each image, and provides the information to the coordinate assembly plugin.
Synchronous/Asynchronous (Status)	Synchronous
Constraints	The value of channelIds cannot be empty. The width and height of images from all channels must be the same. The value of the width of the output image is an integer within the range of [32, 4096]. The default value is 1920. The value of the height of the output image is an integer within the range of [32, 4096]. The default value is 1080.
Plugin Base Class (Factory)	mxpi_channelimagesstitcher
Input/Output	Input: buffer (data type: MxpiBuffer), metadata (data type: MxpiVisionList) Output: buffer (data type: MxpiBuffer), metadata (data type: MxpiVisionList)
Port Format (Caps)	Dynamic input: {"image/yuv"} Static output: {"image/yuv"}; dynamic output: {"metadata/stitch-info"}
Property	For details, see Table Properties of the mxpi_channelimagesstitcher plugin.

**Table 1** Properties of the mxpi_channelimagesstitcher plugin
Property Name	Description	Mandatory or Not	Modifiable or Not
dataSource	Index of the input data. Multiple indexes can be configured, but the number of indexes must be the same as that of input ports. The default value is the key value of the output port of the upstream plugin.	No	Yes
channelIds	Input channel IDs, which are separated by commas (,). Each channel ID must be unique. Example: "channelIds":"0,1"	Yes	Yes
outputWidth	The value of the width of the output image is an integer within the range of [32, 4096]. The default value is 1920.	Yes	Yes
outputHeight	The value of the height of the output image is an integer within the range of [32, 4096]. The default value is 1080.	Yes	Yes
RGBValue	Background color value. Enter the R, G, and B values in sequence, for example, 255,255,255. By default, the value is empty and color padding is not performed. The default background color of DVPP is used.	Yes	Yes

Example

Input buffer 1 to N from multiple channels, specify a channel, and filter out buffers of other channels. Then, the input images are combined into a large image and the preprocessing information of each image is dynamically output to the coordinate assembly plugin.

Pipeline sample:

      
           "mxpi_channelimagesstitcher0":{
    "props":{
         "channelIds":"0,1",
         "outputWidth": "1920",
         "outputHeight": "1080",
         "RGBValue": "255,255,255"
    },
    "factory":"mxpi_channelimagesstitcher",
    "next":["queue8","queue9"]
},

Parent topic: On-Screen Display (OSD) Plugins