Bitwise NOT

The xFbitwise_notfunction performs the pixel wise bitwise NOT operation for the pixels in the input image, and returns an output image.
Where,
  • is the intensity of output image at (x, y) position
  • is the intensity of input image at (x, y) position

API Syntax

template void xFbitwise_not ( xF::Mat src, xF::Mat dst )

Parameter Descriptions

The following table describes the template and the function parameters.

Table 1.xFbitwise_not Function Parameter Descriptions
Parameter Description
SRC_T Input and 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
dst Output image

Resource Utilization

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

Table 2.xFbitwise_not Function Resource Utilization Summary
Operating Mode

Operating Frequency (MHz)

 Utilization Estimate
BRAM_18K DSP_48Es FF LUT CLB
1 pixel 300 0 0 97 78 20
8 pixel 150 0 0 88 97 21

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 a grayscale HD (1080x1920) image.

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