Gaussian Pyramid Extensions

Adds various extensions to the Gaussian Pyramid vision function.

This section describes extensions to the standard Gaussian Image Pyramid vision function.

Level 0 of the Output as Input

VisionWorks extends the Gaussian Pyramid function so that it accepts level 0 of the output pyramid as an input image.

Note

Since VisionWorks slightly relaxes the OpenVX single writer rule in graphs, the level 0 image of the output pyramid object can be generated by an other node in the same graph.

Example Code

    vx_image input_image = vxCreateImage(context, 640, 480, VX_DF_IMAGE_RGB);
    vx_pyramid pyramid = vxCreatePyramid(context, 6, VX_SCALE_PYRAMID_HALF, 640, 480, VX_DF_IMAGE_U8);
    vx_image level0 = vxGetPyramidLevel(pyramid, 0);

    // Dependency [ColorConvert] -> level0 -> [GaussianPyramid]
    vx_graph graph = vxCreateGraph(context);
    vxColorConvertNode(graph, input_image, level0);
    vxGaussianPyramidNode(graph,level0, pyramid);

    vxVerifyGraph(graph);