YUYV to IYUV - 现金网注册平台,现金网博e百,真人百家乐游戏开户

ThexFyuyv2iyuvfunction converts a single-channel YUYV (YUV 4:2:2) image format to IYUV(4:2:0) format. Outputs of the function are separate Y, U, and V planes. YUYV is a sub-sampled format, 1 set of YUYV value gives 2 Y values and 1 U and V value each. U, V values of the odd rows are dropped as U, V values are sampled once for 2 rows and 2 colums in the IYUV(4:2:0) format.

API Syntax

template void xFyuyv2iyuv(xF::Mat & _src, xF::Mat & _y_image, xF::Mat & _u_image, xF::Mat & _v_image)

Parameter Descriptions

The following table describes the template and the function parameters.

Table 1.xFyuyv2iyuv Function Parameter Descriptions
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, 1 channel is supported (XF_8UC1).
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 and XF_NPPC8 for 1 pixel and 8 pixel operations respectively.
_src	Input image of size (ROWS, COLS).
_y_image	Output Y plane of size (ROWS, COLS).
_u_image	Output U plane of size (ROWS/4, COLS).
_v_image	Output V plane of size (ROWS/4, COLS).

Resource Utilization

The following table summarizes the resource utilization of YUYV to IYUV for different configurations, generated usingVivado HLS 2017.1tool for the Xilinx Xczu9eg-ffvb1156-1-i-es1 FPGA, to process a HD (1080x1920) image.

Table 2.xFyuyv2iyuv Function Resource Utilization Summary
Operating Mode	Operating Frequency (MHz)	Utilization Estimate
Operating Mode	Operating Frequency (MHz)	BRAM_18K	DSP_48Es	FF	LUT	CLB
1pixel	300	0	0	835	497	149
8pixel	150	0	0	1428	735	210

Performance Estimate

The following table summarizes the performance of YUYV to IYUV for different configurations, as generated usingVivado HLS 2017.1tool for the Xilinx Xczu9eg-ffvb1156-1-i-es1, to process a grayscale HD (1080x1920) image.

Table 3.xFyuyv2iyuv Function Performance Estimate
Operating Mode	Latency Estimate
Operating Mode	Max Latency(ms)
1 pixel operation(300Mhz)	6.9
8 pixel operation(150Mhz)	1.7