基于EBAZ4205矿板的图像处理:12图像二值化(阈值可调)

先看效果

板卡拿回寝室了,明天晚上再补充实际运行效果

我的项目是可以通过按键调整二值化的阈值的,key1为阈值加1,key2为阈值减1,key3为阈值加10,key4为阈值减10,key5为阈值重置为128。

项目解读

我的blockdesign,你不按照我的接,按照正点原子的开源代码接也是可以的,只是我有强迫症,能接的我都接了。
基于EBAZ4205矿板的图像处理:12图像二值化(阈值可调)-LMLPHP
就是在标准的ov5640->VDMA->DDR->VDMA->DVI_Driver->HDMI的流程(可以点击这个超链接看我说的标准流程)的第一个箭头哪里加了三个模块,一个负责将图像从RGB格式转化为灰度图像,一个负责对灰度图像进行二值化处理,最后一个为PS提供了访问PL端reg的AXILite端口,以便实时调整阈值。

下面的代码里我都添加了(* X_INTERFACE_IGNORE = “true” *) ,是禁用vivado的interface自动推断,可以不加

rgb2gray模块

该模块负责将图像从RGB格式转化为灰度图像
公式:
Y = 0.299R +0.587G + 0.114B
Y = (77 R + 150G + 29 *B)>>8

`timescale 1ns / 1ps
//作者:抢公主的大魔王
//功能:将来自ov5640视频流从RGB格式转化为灰度图像
//日期:24.5.5
//版本:1v0
//联系方式:2376635586@qq.com
module rgb2gray(
    
(* X_INTERFACE_IGNORE = "true" *)  input           cmos_frame_vsync,
(* X_INTERFACE_IGNORE = "true" *)  input [23:0]    cmos_frame_data,
(* X_INTERFACE_IGNORE = "true" *)  input           cmos_frame_href,

(* X_INTERFACE_IGNORE = "true" *)  input           cmos_frame_clk,
(* X_INTERFACE_IGNORE = "true" *)  input           cmos_rstn,//同步复位
(* X_INTERFACE_IGNORE = "true" *)  input           cmos_frame_ce,

(* X_INTERFACE_IGNORE = "true" *)  output          dataout_frame_vsync,
(* X_INTERFACE_IGNORE = "true" *)  output [23:0]   dataout_frame_data,
(* X_INTERFACE_IGNORE = "true" *)  output          dataout_frame_href,
(* X_INTERFACE_IGNORE = "true" *)  output          dataout_frame_ce
    );
    // Y = 0.299R +0.587G + 0.114B
    // Y = (77 *R + 150*G + 29 *B)>>8
    reg [15:0] r_gray1;
    reg [15:0] g_gray1;
    reg [15:0] b_gray1;
    reg [15:0] y1;
    reg [7:0] y2;
    reg [2:0] dataout_frame_vsync_r;
    reg [2:0] dataout_frame_href_r;
    reg [2:0] dataout_frame_ce_r;


    always@(posedge cmos_frame_clk)begin
        if(!cmos_rstn)begin
            r_gray1 <= 8'h00;
            g_gray1 <= 8'h00;
            b_gray1 <= 8'h00;
        end
        else begin
            r_gray1 <= cmos_frame_data[23:16]  * 8'd77 ;
            g_gray1 <= cmos_frame_data[15:8]   * 8'd150;
            b_gray1 <= cmos_frame_data[7:0]    * 8'd29 ;
        end
    end

    always@(posedge cmos_frame_clk)begin
        if(!cmos_rstn)begin
            y1 <= 16'h0000;
        end
        else begin
            y1 <= r_gray1 + g_gray1 + b_gray1;
        end
    end

    always@(posedge cmos_frame_clk)begin
        if(!cmos_rstn)begin
            y2 <= 8'h0000;
        end
        else begin
            y2 <= y1[15:8];
        end
    end

    

    always@(posedge cmos_frame_clk)begin
        if(!cmos_rstn)begin
            dataout_frame_ce_r      <= 3'b000;
            dataout_frame_vsync_r   <= 3'b000;
            dataout_frame_href_r    <= 3'b000;
        end
        else begin
            dataout_frame_ce_r      <= {dataout_frame_ce_r[1:0]     ,cmos_frame_ce};
            dataout_frame_vsync_r   <= {dataout_frame_vsync_r[1:0]  ,cmos_frame_vsync};
            dataout_frame_href_r    <= {dataout_frame_href_r[1:0]   ,cmos_frame_href};
        end
    end
    assign dataout_frame_data = {y2,y2,y2};
    assign dataout_frame_ce = dataout_frame_ce_r[2];
    assign dataout_frame_vsync = dataout_frame_vsync_r[2];
    assign dataout_frame_href = dataout_frame_href_r[2];


endmodule

global_binary模块

负责根据阈值对灰度图像进行二值化处理

`timescale 1ns / 1ps
//作者:抢公主的大魔王
//功能:根据阈值对灰度图像进行二值化处理
//日期:24.5.5
//版本:1v0
//联系方式:2376635586@qq.com
module global_binary(
(* X_INTERFACE_IGNORE = "true" *)  input           datain_vsync,
(* X_INTERFACE_IGNORE = "true" *)  input [23:0]    datain,
(* X_INTERFACE_IGNORE = "true" *)  input           datain_href,

(* X_INTERFACE_IGNORE = "true" *)  input           datain_clk,
(* X_INTERFACE_IGNORE = "true" *)  input           datain_rstn,//同步复位
(* X_INTERFACE_IGNORE = "true" *)  input           datain_frame_ce,

(* X_INTERFACE_IGNORE = "true" *)  input      [7:0]threshold,

(* X_INTERFACE_IGNORE = "true" *)  output          dataout_vsync,
(* X_INTERFACE_IGNORE = "true" *)  output reg [23:0]   dataout,
(* X_INTERFACE_IGNORE = "true" *)  output          dataout_vaild,

(* X_INTERFACE_IGNORE = "true" *)  output          dataout_frame_ce
    );

reg [1:0] dataout_vsync_r;
reg [1:0] dataout_valid_r;
reg [1:0] dataout_frame_ce_r;
always@(posedge datain_clk)begin
    if(!datain_rstn)
        dataout <= 24'hff_ff_ff;
    else if(datain[7:0]>=threshold)
        dataout <= 24'hff_ff_ff;
    else
        dataout  <= 24'h00_00_00;
end
always@(posedge datain_clk)begin
    if(!datain_rstn) begin
        dataout_vsync_r     <=  3'b000;
        dataout_valid_r     <=  3'b000;
        dataout_frame_ce_r  <=  3'b000;
    end
    else begin
        dataout_vsync_r     <=  {dataout_vsync_r[0]     , datain_vsync};
        dataout_valid_r     <=  {dataout_valid_r[0]     , datain_href};
        dataout_frame_ce_r  <=  {dataout_frame_ce_r[0]  , datain_frame_ce};
    end
end

assign dataout_vsync        = dataout_vsync_r[1];
assign dataout_vaild        = dataout_valid_r[1];
assign dataout_frame_ce     = dataout_frame_ce_r[1];

endmodule

AXICtrlThreshold模块

基于EBAZ4205矿板的图像处理:12图像二值化(阈值可调)-LMLPHP
这个就是自己打包的标准的AXILite IP核,然后加了两句代码,一句是将threshold的0到7为连接到这个IP内部的第一个reg的低八位,另一句就是让这个reg复位是被复位为128,而不是0,因为我的图像阈值二值化算法的缺省阈值为128。
打包过程如下
基于EBAZ4205矿板的图像处理:12图像二值化(阈值可调)-LMLPHP
基于EBAZ4205矿板的图像处理:12图像二值化(阈值可调)-LMLPHP
下面要改名字和描述哦。
基于EBAZ4205矿板的图像处理:12图像二值化(阈值可调)-LMLPHP
基于EBAZ4205矿板的图像处理:12图像二值化(阈值可调)-LMLPHP
然后到了这个AXILite IP内部添加下面的代码

assign threshold = slv_reg0[7:0];

然后更改复位值

	  if ( S_AXI_ARESETN == 1'b0 )
	    begin
	      slv_reg0 <= 32'd128;
	      slv_reg1 <= 0;
	      slv_reg2 <= 0;
	      slv_reg3 <= 0;
	    end 

最后把它output出去

output wire [7:0] threshold

IP代码本身,和她的top层都要output
基于EBAZ4205矿板的图像处理:12图像二值化(阈值可调)-LMLPHP

然后在这一栏,所有不是对号的要挨个点一遍,挨个更新一下,最后全是对号之后,就可以打包了。
基于EBAZ4205矿板的图像处理:12图像二值化(阈值可调)-LMLPHP

vitis端代码

IntrHandler是中断回调函数,触发中断后会调用这个函数。
SetupInterruptSystem负责初始化中断,配置触发中断方式,使能中断。
Gpio_Init初始化GPIO,包括key1-5,led1-3和sccb总线(配置OV5640的)
binary_threshold就是我的图像阈值二值化的阈值啦,可以通过按键进行调整。

//作者:抢公主的大魔王
//功能:阈值可调的图像二值化
//日期:24.5.5
//版本:1v0
//联系方式:2376635586@qq.com

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "xil_types.h"
#include "xil_cache.h"
#include "xparameters.h"
#include "xgpiops.h"
#include "xscugic.h"
#include "xil_exception.h"
#include "xplatform_info.h"
#include "xaxivdma.h"
#include "xaxivdma_i.h"
#include "display_ctrl_hdmi/display_ctrl.h"
#include "vdma_api/vdma_api.h"
#include "emio_sccb_cfg/emio_sccb_cfg.h"
#include "ov5640/ov5640_init.h"
#include "sleep.h"

//宏定义
#define DYNCLK_BASEADDR  	XPAR_AXI_DYNCLK_0_BASEADDR  //动态时钟基地址
#define VDMA_ID          	XPAR_AXIVDMA_0_DEVICE_ID    //VDMA器件ID
#define DISP_VTC_ID      	XPAR_VTC_0_DEVICE_ID        //VTC器件ID
#define THRESHOLD_BASEADDR 	XPAR_AXICTRLTHRESHOLD_0_S00_AXI_BASEADDR

#define EMIO_SCL_NUM 54
#define EMIO_SDA_NUM 55
#define KEY1 56 //T19
#define KEY2 57 //P19
#define KEY3 58 //U20
#define KEY4 59 //U19
#define KEY5 60 //V20
#define LED1 61 //H18
#define LED2 62 //K17
#define LED3 63 //E19

#define GPIO_DEVICE_ID  	XPAR_XGPIOPS_0_DEVICE_ID
XGpioPs Gpio;
#define GPIO_BANK	XGPIOPS_BANK0  /* Bank 0 of the GPIO Device */
#define INTC_DEVICE_ID		XPAR_SCUGIC_SINGLE_DEVICE_ID
#define GPIO_INTERRUPT_ID	XPAR_XGPIOPS_0_INTR

//全局变量
//frame buffer的起始地址
unsigned int const frame_buffer_addr = (XPAR_PS7_DDR_0_S_AXI_BASEADDR
										+ 0x1000000);
u8 binary_threshold = 128;
XAxiVdma     vdma;
DisplayCtrl  dispCtrl;
VideoMode    vd_mode;

static XScuGic Intc; /* The Instance of the Interrupt Controller Driver */


static void IntrHandler(void *CallBackRef, u32 Bank, u32 Status)
{
	XGpioPs *Gpio_cb = (XGpioPs *)CallBackRef;
	if (XGpioPs_IntrGetStatusPin(Gpio_cb, KEY1)){
		binary_threshold++;
		Xil_Out32(THRESHOLD_BASEADDR, binary_threshold);
		xil_printf("The threshold has been changed\n\r The threshold now is %d\n\r",binary_threshold);
	}
	else if (XGpioPs_IntrGetStatusPin(Gpio_cb, KEY2)){
		binary_threshold--;
		Xil_Out32(THRESHOLD_BASEADDR, binary_threshold);
		xil_printf("The threshold has been changed\n\r The threshold now is %d\n\r",binary_threshold);
	}
	else if (XGpioPs_IntrGetStatusPin(Gpio_cb, KEY3)){
		binary_threshold = binary_threshold+10;
		Xil_Out32(THRESHOLD_BASEADDR, binary_threshold);
		xil_printf("The threshold has been changed\n\r The threshold now is %d\n\r",binary_threshold);
	}
	else if (XGpioPs_IntrGetStatusPin(Gpio_cb, KEY4)){
		binary_threshold = binary_threshold-10;
		Xil_Out32(THRESHOLD_BASEADDR, binary_threshold);
		xil_printf("The threshold has been changed\n\r The threshold now is %d\n\r",binary_threshold);
	}
	else if (XGpioPs_IntrGetStatusPin(Gpio_cb, KEY5)){
		binary_threshold = 128;
		Xil_Out32(THRESHOLD_BASEADDR, binary_threshold);
		xil_printf("The threshold has been reset\n\r The threshold now is %d\n\r",binary_threshold);
	}
	XGpioPs_WritePin(&Gpio, LED1, !XGpioPs_ReadPin(&Gpio, LED1));
}



void SetupInterruptSystem(XScuGic *GicInstancePtr, XGpioPs *Gpio,
				u16 GpioIntrId){

	XScuGic_Config *IntcConfig;
	Xil_ExceptionInit();

	IntcConfig = XScuGic_LookupConfig(INTC_DEVICE_ID);

	XScuGic_CfgInitialize(GicInstancePtr, IntcConfig,
					IntcConfig->CpuBaseAddress);

	Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,
				(Xil_ExceptionHandler)XScuGic_InterruptHandler,
				GicInstancePtr);
	XScuGic_Connect(GicInstancePtr, GpioIntrId,
				(Xil_ExceptionHandler)IntrHandler,
				(void *)Gpio);


	XScuGic_Enable(GicInstancePtr, GpioIntrId);

	XGpioPs_SetIntrTypePin(Gpio, KEY1,  XGPIOPS_IRQ_TYPE_EDGE_FALLING);
	XGpioPs_SetIntrTypePin(Gpio, KEY2,  XGPIOPS_IRQ_TYPE_EDGE_FALLING);
	XGpioPs_SetIntrTypePin(Gpio, KEY3,  XGPIOPS_IRQ_TYPE_EDGE_FALLING);
	XGpioPs_SetIntrTypePin(Gpio, KEY4,  XGPIOPS_IRQ_TYPE_EDGE_FALLING);
	XGpioPs_SetIntrTypePin(Gpio, KEY5,  XGPIOPS_IRQ_TYPE_EDGE_FALLING);

	XGpioPs_IntrEnablePin(Gpio, KEY1);
	XGpioPs_IntrEnablePin(Gpio, KEY2);
	XGpioPs_IntrEnablePin(Gpio, KEY3);
	XGpioPs_IntrEnablePin(Gpio, KEY4);
	XGpioPs_IntrEnablePin(Gpio, KEY5);

	Xil_ExceptionEnableMask(XIL_EXCEPTION_IRQ);
}


void Gpio_Init(void){
	XGpioPs_Config *ConfigPtr;

	ConfigPtr = XGpioPs_LookupConfig(GPIO_DEVICE_ID);
	XGpioPs_CfgInitialize(&Gpio, ConfigPtr,ConfigPtr->BaseAddr);

	XGpioPs_SetDirectionPin(&Gpio, LED1, 1);
	XGpioPs_SetOutputEnablePin(&Gpio, LED1, 1);
	XGpioPs_WritePin(&Gpio, LED1, 0);

	XGpioPs_SetDirectionPin(&Gpio, LED2, 1);
	XGpioPs_SetOutputEnablePin(&Gpio, LED2, 1);
	XGpioPs_WritePin(&Gpio, LED2, 0);

	XGpioPs_SetDirectionPin(&Gpio, LED3, 1);
	XGpioPs_SetOutputEnablePin(&Gpio, LED3, 1);
	XGpioPs_WritePin(&Gpio, LED3, 0);

	XGpioPs_SetDirectionPin(&Gpio, KEY1, 0);
	XGpioPs_SetDirectionPin(&Gpio, KEY2, 0);
	XGpioPs_SetDirectionPin(&Gpio, KEY3, 0);
	XGpioPs_SetDirectionPin(&Gpio, KEY4, 0);
	XGpioPs_SetDirectionPin(&Gpio, KEY5, 0);

	//设置 sccb端口 为输出
	XGpioPs_SetDirectionPin(&Gpio, EMIO_SCL_NUM, 1);
	XGpioPs_SetDirectionPin(&Gpio, EMIO_SDA_NUM, 1);

	//使能sccb端口 输出
	XGpioPs_SetOutputEnablePin(&Gpio, EMIO_SCL_NUM, 1);
	XGpioPs_SetOutputEnablePin(&Gpio, EMIO_SDA_NUM, 1);

	//将sccb的SCLK和SDA都拉高
	XGpioPs_WritePin(&Gpio, EMIO_SCL_NUM, 1);
	XGpioPs_WritePin(&Gpio, EMIO_SDA_NUM, 1);

	SetupInterruptSystem(&Intc, &Gpio, GPIO_INTERRUPT_ID);
}


int main(void)
{
	u32 status;
	u16 cmos_h_pixel;                    //ov5640 DVP 输出水平像素点数
	u16 cmos_v_pixel;                    //ov5640 DVP 输出垂直像素点数
	u16 total_h_pixel;                   //ov5640 水平总像素大小
	u16 total_v_pixel;                   //ov5640 垂直总像素大小

	cmos_h_pixel = 1280;
	cmos_v_pixel = 720;
	total_h_pixel = 2570;
	total_v_pixel = 980;


	Gpio_Init();                         //初始化EMIO
	status = ov5640_init( cmos_h_pixel,  //初始化ov5640
						  cmos_v_pixel,
						 total_h_pixel,
						 total_v_pixel);//设置OV5640输出分辨率为1280*720  PCLK = 72Mhz
	if(status == 0)
		xil_printf("OV5640 detected successful!\r\n");
	else
		xil_printf("OV5640 detected failed!\r\n");

	vd_mode = VMODE_1280x720;

	//配置VDMA
	run_vdma_frame_buffer(&vdma, VDMA_ID, vd_mode.width, vd_mode.height,
							frame_buffer_addr,0,0,BOTH);
    //初始化Display controller
	DisplayInitialize(&dispCtrl, DISP_VTC_ID, DYNCLK_BASEADDR);
    //设置VideoMode
	DisplaySetMode(&dispCtrl, &vd_mode);
	DisplayStart(&dispCtrl);

	while(1){
		XGpioPs_WritePin(&Gpio, LED3, !XGpioPs_ReadPin(&Gpio, LED3));
		sleep(1);
	}
    return 0;
}


05-06 02:34