Frame-difference image implementation of vivado HLS using ip in vivado

1. Frame Difference Method The frame difference method is very simple to implement:

As can be seen from the figure, the motion change area caused by the target motion includes three parts of the common position (black area in the figure) of the motion target in the front and rear two frames, the newly revealed background area in the current frame, and the newly covered background area.
Mathematical principles:

2.vivado HLS implementation

Vivado HSL is a high-level synthesis tool that Xilinx Company introduces, can use C/C++ to be able to realize the development of the traditional verilog language, has reduced the difficulty of development, the built-in hls video storehouse has realized the basic opencv function, the direct call can realize and change.
(1) Open the HLS as shown below

(2) Create a new project

(3) Keep clicking next and the following figure appears

(4) choose the FPGA chip type mine is 7020-2

(5) After the selection is completed as shown below

(6) After clicking finish, as shown below

(7) right key source select new file input file name top.cpp

#include "top.h"

#include "hls_math.h"

Void hls_counter_color1(AXI_STREAM_IN & INPUT_STREAM1,

AXI_STREAM_IN& INPUT_STREAM2, AXI_STREAM_OUT& OUTPUT_STREAM, int rows,

Int cols) {

#pragma HLS INTERFACE axis port=INPUT_STREAM1

#pragma HLS INTERFACE axis port=INPUT_STREAM2

#pragma HLS INTERFACE axis port=OUTPUT_STREAM

#pragma HLS RESOURCE core=AXI_SLAVE variable=rows metadata=“-bus_bundle CONTROL_BUS”

#pragma HLS RESOURCE core=AXI_SLAVE variable=cols metadata=“-bus_bundle CONTROL_BUS”

#pragma HLS RESOURCE core=AXI_SLAVE variable=return metadata=“-bus_bundle CONTROL_BUS”

#pragma HLS INTERFACE ap_stable port=rows

#pragma HLS INTERFACE ap_stable port=cols

RGB_IMAGE img_01(rows, cols);

RGB_IMAGE img_02(rows, cols);

GRAY_IMAGE img_1(rows, cols);

GRAY_IMAGE img_2(rows, cols);

GRAY_IMAGE img_4(rows, cols);

GRAY_IMAGE img_5(rows, cols);

RGB_IMAGE img_3(rows, cols);

#pragma HLS dataflow

Hls::AXIvideo2Mat(INPUT_STREAM1, img_01);

Hls::AXIvideo2Mat(INPUT_STREAM2, img_02);

Hls::CvtColor(img_01, img_1);

Hls::CvtColor(img_02, img_2);

Hls::AbsDiff(img_1,img_2,img_4);

Hls::Mat2AXIvideo(img_4, OUTPUT_STREAM);

}

(8) continue right-source select new file input top.h

#ifndef _TOP_H_

#define _TOP_H_

#include "hls_video.h"

//#include "ap_int.h"

//#include

#define MAX_WIDTH 2048

#define MAX_HEIGHT 1536

#define INPUT_IMAGE1 "a1.jpg"

#define INPUT_IMAGE2 "a2.jpg"

//#define INPUT_IMAGE "test_1080p.bmp"

#define OUTPUT_IMAGE "result_1080p.jpg"

#define OUTPUT_IMAGE_GOLDEN "result_1080p_golden.bmp"

// typedef video library core structures

Typedef hls::stream 》 AXI_STREAM_IN;

Typedef hls::stream 》 AXI_STREAM_OUT;

Typedef hls::Mat RGB_IMAGE;

Typedef hls::Mat GRAY_IMAGE;

// Top level synthesis function

Void hls_counter_color1(AXI_STREAM_IN& src_axi1, AXI_STREAM_IN& src_axi2, AXI_STREAM_OUT& dst_axi, int rows, int cols);

#endif

(9) Click Test Bench Right click new file input file name test.cpp

#include "top.h"

#include "hls_opencv.h"

#include "iostream"

Using namespace std;

Using namespace cv;

Const int N = 2;

Int main(int argc, char** argv) {

For (int i = 0; i "N"//Get Image Data

IplImage* src1 = cvLoadImage(INPUT_IMAGE1);

IplImage* src2 = cvLoadImage(INPUT_IMAGE2);

IplImage* dst1 = cvCreateImage(cvGetSize(src1), 8,1);

AXI_STREAM_IN src_axi1;

AXI_STREAM_IN src_axi2;

AXI_STREAM_OUT dst_axi;

IplImage2AXIvideo(src1, src_axi1);

IplImage2AXIvideo(src2, src_axi2);

Hls_counter_color1(src_axi1, src_axi2, dst_axi, src1-"height,

Src1-"width);

AXIvideo2IplImage(dst_axi, dst1);

cvSaveImage(OUTPUT_IMAGE, dst1);

// Release memory

cvReleaseImage (&src1);

cvReleaseImage (&src2);

cvReleaseImage (&dst1);

}

}

(10) Click Test Bench and right click add file to add two motion images, the file name and top.h

#define INPUT_IMAGE1 "a1.jpg"

#define INPUT_IMAGE2 "a2.jpg"

the same

(11) Add a top-level file

Right Project Project SetTIngs ---Synthesis

Click OK as above

(12) SoluTIon

Select AcTIve SoluTIon to wait for completion as shown below

(13)C Simulation

Click ok to wait for completion

(14)View generated picture

Project file in the solution1 folder under csim build

Generate image as above

Project completed

(15) generate IP file click on the button

Click OK to complete the IP generation

Generated IP

Then you can call IP in vivado.

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