Channel Combine
ThexFmergefunction, merges single channel images into a multi-channel image. The number of channels to be merged should be four.
API Syntax
template void xFmerge(xF::Mat &_src1, xF::Mat &_src2, xF::Mat &_src3, xF::Mat &_src4, xF::Mat &_dst) Parameter Descriptions
The following table describes the template and the function parameters.
| Parameter | Description |
|---|---|
| SRC_T | Input pixel type. Only 8-bit, unsigned, 4 channel is supported (XF_8UC1) |
| DST_T | Output pixel type. Only 8-bit, unsigned,1 channel is supported (XF_8UC4) |
| ROWS | Maximum height of input and output image (must be a multiple of 8) |
| COLS | Maximum width of input and output image (must be a multiple of 8) |
| NPC | Number of pixels to be processed per cycle; possible options are XF_NPPC1 for 1 pixel operation. |
| _src1 | Input single-channel image |
| _src2 | Input single-channel image |
| _src3 | Input single-channel image |
| _src4 | Input single-channel image |
| _dst | Output multi-channel image |
Resource Utilization
The following table summarizes the resource utilization of the xFmerge function, generated usingVivado HLS 2017.1tool for theXilinx Xczu9eg-ffvb1156-1-i-es1FPGA, to process 4 single-channel HD (1080x1920) images.
| Operating Mode | Operating Frequency (MHz) |
Utilization Estimate | ||||
|---|---|---|---|---|---|---|
| BRAM_18K | DSP_48Es | FF | LUT | CLB | ||
| 1 pixel | 300 | 0 | 8 | 494 | 386 | 85 |
Performance Estimate
The following table summarizes the performance in different configurations, as generated usingVivado HLS 2017.1tool for theXilinx Xczu9eg-ffvb1156-1-i-es1, to process 4 single channel HD (1080x1920) images.
| Operating Mode | Latency Estimate |
|---|---|
| Max Latency | |
| 1 pixel operation (300 MHz) | 6.92 ms |