vx_tutorial_graph_image_gradients.c

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#include <stdio.h>
#include <VX/vx.h>
#include <TI/tivx.h>
#include <utility.h>

#define IN_FILE_NAME         "${VX_TEST_DATA_PATH}/colors.bmp"

#define PHASE_FILE_NAME      "${VX_TEST_DATA_PATH}/vx_tutorial_graph_image_gradients_phase_out.bmp"

#define MAGNITUDE_FILE_NAME  "${VX_TEST_DATA_PATH}/vx_tutorial_graph_image_gradients_magnitude_out.bmp"

#define GRAD_X_FILE_NAME     "${VX_TEST_DATA_PATH}/vx_tutorial_graph_image_gradients_grad_x_out.bmp"

#define GRAD_Y_FILE_NAME     "${VX_TEST_DATA_PATH}/vx_tutorial_graph_image_gradients_grad_y_out.bmp"

#define NUM_NODES    (6u)

void vx_tutorial_graph_image_gradients()
{
    vx_context context;
    vx_image in_image = NULL;
    vx_image grad_x = NULL;
    vx_image grad_y = NULL;
    vx_image magnitude = NULL;
    vx_image phase = NULL;
    vx_image magnitude_image = NULL;
    vx_image grad_x_image = NULL;
    vx_image grad_y_image = NULL;
    vx_graph graph = NULL;
    vx_scalar shift = NULL;
    vx_node node[NUM_NODES] = {NULL};
    int32_t shift_value = 0;
    vx_uint32 width, height;
    vx_status status;
    uint32_t i;

    printf(" vx_tutorial_graph_image_gradients: Tutorial Started !!! \n");

    context = vxCreateContext();
    printf(" Loading file %s ...\n", IN_FILE_NAME);

    in_image = tivx_utils_create_vximage_from_bmpfile(context, IN_FILE_NAME, (vx_bool)vx_true_e);
    vxSetReferenceName((vx_reference)in_image, "INPUT");

    show_image_attributes(in_image);
    vxQueryImage(in_image, (vx_enum)VX_IMAGE_WIDTH, &width, sizeof(vx_uint32));
    vxQueryImage(in_image, (vx_enum)VX_IMAGE_HEIGHT, &height, sizeof(vx_uint32));

    grad_x = vxCreateImage(context, width, height, (vx_df_image)VX_DF_IMAGE_S16);
    vxSetReferenceName((vx_reference)grad_x, "GRAD_X");

    show_image_attributes(grad_x);
    grad_y = vxCreateImage(context, width, height, (vx_df_image)VX_DF_IMAGE_S16);
    vxSetReferenceName((vx_reference)grad_y, "GRAD_Y");

    show_image_attributes(grad_y);
    magnitude = vxCreateImage(context, width, height, (vx_df_image)VX_DF_IMAGE_S16);
    vxSetReferenceName((vx_reference)magnitude, "MAGNITUDE");

    show_image_attributes(magnitude);
    magnitude_image = vxCreateImage(context, width, height, (vx_df_image)VX_DF_IMAGE_U8);
    vxSetReferenceName((vx_reference)magnitude_image, "MAGNITUDE_IMAGE");

    show_image_attributes(magnitude_image);
    grad_x_image = vxCreateImage(context, width, height, (vx_df_image)VX_DF_IMAGE_U8);
    vxSetReferenceName((vx_reference)grad_x_image, "GRAD_X_IMAGE");

    show_image_attributes(grad_x_image);
    grad_y_image = vxCreateImage(context, width, height, (vx_df_image)VX_DF_IMAGE_U8);
    vxSetReferenceName((vx_reference)grad_y_image, "GRAD_Y_IMAGE");

    show_image_attributes(grad_y_image);
    shift = vxCreateScalar(context, (vx_enum)VX_TYPE_INT32, &shift_value);

    phase = vxCreateImage(context, width, height, (vx_df_image)VX_DF_IMAGE_U8);
    vxSetReferenceName((vx_reference)phase, "PHASE");

    show_image_attributes(phase);
    graph = vxCreateGraph(context);
    i = 0;

    node[i] = vxSobel3x3Node(graph, in_image, grad_x, grad_y);
    vxSetReferenceName((vx_reference)node[i], "SOBEL3x3");

    vxSetNodeTarget(node[i], (vx_enum)VX_TARGET_STRING, TIVX_TARGET_DSP1);
    i++;

    node[i] = vxMagnitudeNode(graph, grad_x, grad_y, magnitude);
    vxSetReferenceName((vx_reference)node[i], "MAGNITUDE");

    vxSetNodeTarget(node[i], (vx_enum)VX_TARGET_STRING, TIVX_TARGET_DSP1);
    i++;

    node[i] = vxPhaseNode(graph, grad_x, grad_y, phase);
    vxSetReferenceName((vx_reference)node[i], "PHASE");
    if ((vx_bool)vx_true_e == tivxIsTargetEnabled(TIVX_TARGET_DSP2))
    {
        vxSetNodeTarget(node[i], (vx_enum)VX_TARGET_STRING, TIVX_TARGET_DSP2);
    }
    else /* DSP2 is not present on some platforms, so changing target to DSP1 */
    {
        vxSetNodeTarget(node[i], (vx_enum)VX_TARGET_STRING, TIVX_TARGET_DSP1);
    }
    i++;

    node[i] = vxConvertDepthNode(graph,
                    magnitude, magnitude_image,
                    (vx_enum)VX_CONVERT_POLICY_SATURATE,
                    shift);
    vxSetReferenceName((vx_reference)node[i], "MAGNITUDE_IMAGE");

    vxSetNodeTarget(node[i], (vx_enum)VX_TARGET_STRING, TIVX_TARGET_DSP1);
    i++;

    node[i] = vxConvertDepthNode(graph,
                    grad_x, grad_x_image,
                    (vx_enum)VX_CONVERT_POLICY_SATURATE,
                    shift);
    vxSetReferenceName((vx_reference)node[i], "GRAD_X_IMAGE");

    vxSetNodeTarget(node[i], (vx_enum)VX_TARGET_STRING, TIVX_TARGET_DSP1);
    i++;

    node[i] = vxConvertDepthNode(graph,
                    grad_y, grad_y_image,
                    (vx_enum)VX_CONVERT_POLICY_SATURATE,
                    shift);
    vxSetReferenceName((vx_reference)node[i], "GRAD_Y_IMAGE");

    if ((vx_bool)vx_true_e == tivxIsTargetEnabled(TIVX_TARGET_DSP2))
    {
        vxSetNodeTarget(node[i], (vx_enum)VX_TARGET_STRING, TIVX_TARGET_DSP2);
    }
    else /* DSP2 is not present on some platforms, so changing target to DSP1 */
    {
        vxSetNodeTarget(node[i], (vx_enum)VX_TARGET_STRING, TIVX_TARGET_DSP1);
    }
    i++;

    status = vxVerifyGraph(graph);
    tivxExportGraphToDot(graph, ".", "vx_tutorial_graph_image_gradients");
    show_graph_attributes(graph);
    for(i=0; i<sizeof(node)/sizeof(node[0]); i++)
    {
        if(node[i])
        {
            show_node_attributes(node[i]);
        }
    }

    if(status==(vx_status)VX_SUCCESS)
    {
        printf(" Executing graph ...\n");

        vxScheduleGraph(graph);
        vxWaitGraph(graph);
        printf(" Executing graph ... Done !!!\n");

        show_graph_attributes(graph);
        for(i=0; i<sizeof(node)/sizeof(node[0]); i++)
        {
            if(node[i])
            {
                show_node_attributes(node[i]);
            }
        }

        printf(" Saving to file %s ...\n", PHASE_FILE_NAME);
        tivx_utils_save_vximage_to_bmpfile(PHASE_FILE_NAME, phase);
        printf(" Saving to file %s ...\n", MAGNITUDE_FILE_NAME);
        tivx_utils_save_vximage_to_bmpfile(MAGNITUDE_FILE_NAME, magnitude_image);
        printf(" Saving to file %s ...\n", GRAD_X_FILE_NAME);
        tivx_utils_save_vximage_to_bmpfile(GRAD_X_FILE_NAME, grad_x_image);
        printf(" Saving to file %s ...\n", GRAD_Y_FILE_NAME);
        tivx_utils_save_vximage_to_bmpfile(GRAD_Y_FILE_NAME, grad_y_image);
    }

    vxReleaseImage(&in_image);
    vxReleaseImage(&grad_x);
    vxReleaseImage(&grad_y);
    vxReleaseImage(&grad_x_image);
    vxReleaseImage(&grad_y_image);
    vxReleaseImage(&phase);
    vxReleaseImage(&magnitude);
    vxReleaseImage(&magnitude_image);
    vxReleaseScalar(&shift);
    for(i=0; i<sizeof(node)/sizeof(node[0]); i++)
    {
        if(node[i])
        {
            vxReleaseNode(&node[i]);
        }
    }

    vxReleaseGraph(&graph);
    vxReleaseContext(&context);
    printf(" vx_tutorial_graph_image_gradients: Tutorial Done !!! \n");
    printf(" \n");
}