IYUV to YUV4 - 现金网注册平台,现金网博e百,真人百家乐游戏开户

ThexFiyuv2yuv4function converts a single channel IYUV image to a YUV444 format. Y plane is same for both the formats. The inputs are separate U and V planes of IYUV image and the outputs are separate U and V planes of YUV4 image. IYUV stores subsampled U,V values. YUV format stores U and V values for every pixel. The same U, V values are duplicated for 2 rows and 2 columns (2x2) pixels in order to get the required data in the YUV444 format.

API Syntax

template void xFiyuv2yuv4(xF::Mat & src_y, xF::Mat & src_u,xF::Mat & src_v,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.xFiyuv2yuv4 Function Parameter Descriptions
Parameter	Description
SRC_T	Input 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_y	Input Y plane of size (ROWS, COLS).
src_u	Input U plane of size (ROWS/4, COLS).
src_v	Input V plane of size (ROWS/4, COLS).
_y_image	Output Y image of size (ROWS, COLS).
_u_image	Output U image of size (ROWS, COLS).
_v_image	Output V image of size (ROWS, COLS).

Resource Utilization

The following table summarizes the resource utilization of IYUV to YUV4 for different configurations, generated usingVivado HLS 2017.1tool for theXilinx Xczu9eg-ffvb1156-1-i-es1FPGA, to process a HD (1080x1920) image.

Table 2.xFiyuv2yuv4 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	1398	870	232
8pixel	150	0	0	2134	1214	304

Performance Estimate

The following table summarizes the performance of IYUV to YUV4 for different configurations, as generated using theVivado HLS 2017.1version tool for theXilinx Xczu9eg-ffvb1156-1-i-es1, to process a grayscale HD (1080x1920) image.

Table 3.xFiyuv2yuv4 Function Performance Estimate Summary
Operating Mode	Latency Estimate
Operating Mode	Max Latency (ms)
1 pixel operation(300Mhz)	13.8
8 pixel operation(150Mhz)	3.4