SDI Technologies iH30 Especificações descarregar pdf (Página 50)

Video Compositing

Quadro SDI Output PG-03776-001_v06 | 45

7.3 LUMA-KEYING

For luma keying, the application specifies up to two pairs of luma (Y) values via the API.

These values represent the starting and ending luma values for replacement. Luma

keying is enabled with the range specified as follows.

// Y composite ranges

l_vioConfig.fields = 0; // reset fields

l_vioConfig.fields = NVVIOCONFIG_COMPOSITE |

NVVIOCONFIG_COMPOSITE_Y;

l_vioConfig.vioConfig.outConfig.enableComposite = TRUE;

l_vioConfig.vioConfig.outConfig.compRange.uEnabled = TRUE;

l_vioConfig.vioConfig.outConfig.compRange.uRange = 0;

l_vioConfig.vioConfig.outConfig.compRange.uMin = yCompRange[0];

l_vioConfig.vioConfig.outConfig.compRange.uMax = yCompRange[1];

if (NvAPI_VIO_SetConfig(m_vioHandle, &l_vioConfig)!= NVAPI_OK) {

return E_FAIL;

}

l_vioConfig.vioConfig.outConfig.compRange.uRange = 1;

l_vioConfig.vioConfig.outConfig.compRange.uMin = yCompRange[2];

l_vioConfig.vioConfig.outConfig.compRange.uMax = yCompRange[3];

if (NvAPI_VIO_SetConfig(m_vioHandle, &l_vioConfig)!= NVAPI_OK) {

return E_FAIL;

}

When luma compositing is enabled, the Quadro SDI compares the luma (Y) for each

incoming video pixel to the specified ranges. If the value for that pixel is within a

specified range, the color or that pixel is replaced with the pixel color from the GPU.

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SDI Technologies iH30 Especificações Página 50