The yuyv2rgba function converts a single-channel YUYV (YUV 4:2:2)
image format to a 4-channel RGBA image. YUYV is a sub-sampled format, a
set of YUYV value gives 2 RGBA pixel values. YUYV is represented in
16-bit values where as, RGBA is represented in 32-bit values.
API Syntax
template<int SRC_T, int DST_T, int ROWS, int COLS, int NPC=1, int XFCVDEPTH_IN = _XFCVDEPTH_DEFAULT, int XFCVDEPTH_OUT = _XFCVDEPTH_DEFAULT>
void yuyv2rgba(xf::cv::Mat<SRC_T, ROWS, COLS, NPC, XFCVDEPTH_IN> & _src, xf::cv::Mat<DST_T, ROWS, COLS, NPC, XFCVDEPTH_OUT> & _dst)
Parameter Descriptions
The following table describes the template and the function parameters.
| Parameter | Description |
|---|---|
| SRC_T | Input pixel type. Only 16-bit, unsigned, 1-channel is supported (XF_16UC1). |
| DST_T | Output pixel type. Only 8-bit, unsigned, 4-channel is supported (XF_8UC4). |
| ROWS | Maximum height of input and output image. |
| COLS | Maximum width of input and output image. Must be a multiple of 8 incase of 8 pixel mode. |
| NPC | Number of pixels to be processed per cycle; possible options are XF_NPPC1 and XF_NPPC8 for 1 pixel and 8 pixel operations respectively. |
| XFCVDEPTH_IN | Depth of input image |
| XFCVDEPTH_OUT | Depth of output image |
| _src | Input image of size (ROWS, COLS). |
| _dst | Output image of size (ROWS, COLS). |
Resource Utilization
The following table summarizes the resource utilization of YUYV to RGBA for different configurations, generated using Vivado HLS 2019.1 tool for the Xczu9eg-ffvb1156-1-i-es1 FPGA, to process a HD (1080x1920) image.
| Operating Mode | Operating Frequency (MHz) | Utilization Estimate | ||||
|---|---|---|---|---|---|---|
| BRAM_18K | DSP_48Es | FF | LUT | CLB | ||
| 1 Pixel | 300 | 0 | 6 | 765 | 705 | 165 |
Performance Estimate
The following table summarizes the performance of UYVY to RGBA for different configurations, as generated using Vivado HLS 2019.1 tool for the Xczu9eg-ffvb1156-1-i-es1, to process a grayscale HD (1080x1920) image.
| Operating Mode | Latency Estimate |
|---|---|
| Max Latency (ms) | |
| 1 pixel operation (300 MHz) | 6.9 |