ImageZeroPadding

The ImageZeroPadding node is used to zero-fill a 2D image. That is, first create a basic image with the length and width specified by the parameters and the gray value is all 0, and then “stick” the input graph in the basic graph and output according to the starting coordinates specified by the parameters.

The node is often used to ImageCrop after the size of the recovery.

Node parameter

  • ImgWidthOffset：Image zero fills the column coordinates of the starting point.

  • ImgHeightOffset：Image zero fills the starting line coordinates.

  • ImgWidth：The width of the target resulting image after image zero filling.

  • ImgHeight：The height of the target resulting image after image zero filling.

  • image：Sets the visual properties of an image in a 2D view.

    • icon_visOn Open image visualization.

    • icon_visOff Turn off image visualization.

  • image_list：Sets the visual properties of the image list in 2D view. The property value description is consistent with image.

Data signal input and output

Input：

Note：Select one of the data signals to input according to the requirements.

  • image :

    • Data type：Image

    • Input content：Image processing to be zero filled

  • image_list :

    • Data type：ImageList

    • Input content：List of images to be processed with zero fill

Output：

  • image :

  • Data type：Image

  • Output content：Zero-fill image after processing

  • image_list :

    • Data type：ImageList

    • Output content：List of images after zero padding processing

Functional Demo

The ImageZeroPadding node was used to zero-fill the cut 2D image, create a base image with 1918*1076 and all gray values of 0 according to the original size of the image, and “paste” the cut image in the original position.

Image cutting part of the reference ImageCrop function demonstration part of the node.

Step 1: node preparation

Add Trigger, Load, ImageZeroPadding nodes to the node graph.

Step 2: Set the node parameters

  1. Set the Load node parameters:

    • node_name → LoadCropImage

    • type → Image

    • filename → icon_more → Select the cut file name （ example_data/images/banana.png )

    • image → icon_visOn

  2. Set the Load_1 node parameters：

    • node_name → ImageOriginal

    • type → Image

    • filename → icon_more → Select the image file name before cutting （ example_data/images/image.png )

    • image → icon_visOn

  3. Set the ImageZeroPadding node parameter:

  • ImgWidthOffset → 0

  • ImgHeightOffset → 0

  • ImgWidth → 1918

  • ImgHeight → 1076

  • image → icon_visOn

Step 3: Connect node

image-20231229153442708

Step 4: Run

Click the Run button of RVS to Trigger the trigger node.

Running result

The result of the Load node and the ImageZeroPadding node is shown in the 2D view as shown in the following figure. The base image size of the output of the ImageZeroPadding node: 1918*1076, the “paste” part of the graph starts at the origin.

image-20231229152113942