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软件版本:Anlogic -TD5.6.1-64bit 操作系统:WIN10 64bit 硬件平台:适用安路(Anlogic)FPGA 1概述本文简述了图像Gamma伽马变换的算法,讲解如何进行Verilog的算法实现,并进行上板实验。 2算法原理简介伽马变换主要用于图像的校正,将灰度过高或者灰度过低的图片进行修正,增强对比度。变换公式就是对原图像上每一个像素值做乘积运算: g=c*r^y
其中c为常数系数,r为图像像素值,取值范围0~255,为伽马变换因子,值以1为分界,值越小,对图像低灰度部分的扩展作用就越强,值越大,对图像高灰度部分的扩展作用就越强,通过不同的值,就可以达到增强低灰度或高灰度部分细节的作用。伽马变换对于图像对比度偏低,并且整体亮度值偏高(对于于相机过曝)情况下的图像增强效果明显。 伽马变换对图像的修正作用其实就是通过增强低灰度或高灰度的细节实现的,从伽马曲线可以直观理解: 3算法仿真 3.1Matlab算法仿真 3.1.1Matlab算法代码分析
- clear;clear all;clc;
-
- image_in = imread('lena_1280x720.jpg');
- [row,col,n] = size(image_in);
-
- image_out =imadjust(image_in,[],[],0.75);
- image_out1=imadjust(image_in,[],[],1.5);
-
- figure
- subplot(131);
- imshow(image_in), title('the original image');
- subplot(132);
- imshow(image_out), title('the translated image ');
- subplot(133);
- imshow(image_out1), title('the translated image 1');
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- clear;clear all;clc;
- num = 256;
-
- r = [0:1:255];
-
- c =16;
-
- g = c*sqrt(r);
-
- %=================================================================
- fid = fopen('gamma_sqrt_para_256.coe','w');
-
- fprintf(fid,'memory_initialization_radix = 10;\n');
- fprintf(fid,'memory_initialization_vector =\n');
-
- for n = 1:num
- gamma(n) = round(g(n));
- end
-
- for n = 1: num - 1
- fprintf(fid,'%d, \n',gamma(n));
- end
-
- fprintf(fid,'%d;',gamma(256));
- fclose(fid);
-
- %=================================================================
- fid1 = fopen('../src/image_rom_gamma_sqrt_para.v','w');
-
- fprintf(fid1,'module image_rom_gamma_sqrt_para\n');
- fprintf(fid1,'(\n');
- fprintf(fid1,' input clka,\n');
- fprintf(fid1,' input [7:0] addra,\n');
- fprintf(fid1,' input ena,\n');
- fprintf(fid1,' output [7:0] douta\n');
- fprintf(fid1,');\n');
- fprintf(fid1,'reg [7:0] DATA;\n');
- fprintf(fid1,'assign douta = DATA;\n');
- fprintf(fid1,'always@(*)\n');
- fprintf(fid1,'begin\n');
- fprintf(fid1,' case(addra)\n');
-
- for n = 1:num
- gamma(n) = round(g(n));
- end
-
- for n = 1: num
- fprintf(fid1,'%d : DATA <= %d; \n',n-1,gamma(n));
- end
- fprintf(fid1,' default: DATA<= 0;\n');
- fprintf(fid1,' endcase\n');
- fprintf(fid1,'end\n');
- fprintf(fid1,'endmodule\n');
- fclose(fid1);
- %=================================================================
-
- g1 = (r.^2)/255;
- %=================================================================
- fid = fopen('gamma_square_para_256.coe','w');
-
- fprintf(fid,'memory_initialization_radix = 10;\n');
- fprintf(fid,'memory_initialization_vector =\n');
-
- for n = 1:num
- gamma(n) = round(g1(n));
- end
-
- for n = 1: num - 1
- fprintf(fid,'%d, \n',gamma(n));
- end
-
- fprintf(fid,'%d;',gamma(256));
- fclose(fid);
-
- %=================================================================
- fid1 = fopen('../src/image_rom_gamma_square_para.v','w');
-
- fprintf(fid1,'module image_rom_gamma_square_para\n');
- fprintf(fid1,'(\n');
- fprintf(fid1,' input clka,\n');
- fprintf(fid1,' input [7:0] addra,\n');
- fprintf(fid1,' input ena,\n');
- fprintf(fid1,' output [7:0] douta\n');
- fprintf(fid1,');\n');
- fprintf(fid1,'reg [7:0] DATA;\n');
- fprintf(fid1,'assign douta = DATA;\n');
- fprintf(fid1,'always@(*)\n');
- fprintf(fid1,'begin\n');
- fprintf(fid1,' case(addra)\n');
-
- for n = 1:num
- gamma(n) = round(g1(n));
- end
-
- for n = 1: num
- fprintf(fid1,'%d : DATA <= %d; \n',n-1,gamma(n));
- end
- fprintf(fid1,' default: DATA<= 0;\n');
- fprintf(fid1,' endcase\n');
- fprintf(fid1,'end\n');
- fprintf(fid1,'endmodule\n');
- fclose(fid1);
- %================================================================
-
- hold on
- plot(r);
- plot(g);
- plot(g1);
- legend('f','gamma g','gamma g1');
- hold off
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3.1.2Matlab实验结果
3.2Verilog算法仿真
3.2.1Modelsim仿真
3.2.1.1仿真执行在件夹Algorithm_simulation下进行算法的仿真,分为sim,src和tb三个子文件夹。在sim文件夹下有win系统的快捷执行文件sim.bat,可以一键进行仿真,src文件下放的是Verilog的核心图像算法及其顶层与输入图像激励,tb文件下放的是测试激励文件及输出图像的保存。 双击执行sim文件夹下sim.bat,自动打开Modelsim仿真,自动添加仿真波形,执行完成后自动保存图像,仿真波形如图所示:
图像数据通过摄像头采集进来,先缓存在fifo中,然后通过写状态机,将图像数据送进DDR进行缓存,缓存后的图像数据从DDR中取出,通过读状态机送出到fifo中,然后算法处理模块在fifo中取出数据,完成数据处理后送到LCD进行显示输出。 3.2.1.2仿真关键部分代码解析- #
- # Create work library
- #
- vlib work
- #
- # Compile sources
- #
- vlog "../src/*.v"
- vlog "../tb/*.v"
- #
- # Call vsim to invoke simulator
- #
- vsim -voptargs=+acc work.top_tb
- #
- # Add waves
- #
- do wave.do
- #
- # Run simulation
- #
- run -all
- #
- # End
-
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- reg en;
- reg [12:0] h_syn_cnt = 'd0;
- reg [12:0] v_syn_cnt = 'd0;
- reg [23:0] image [0 : H_ACTIVE*V_ACTIVE-1];
- reg [31:0] image_cnt = 'd0;
-
- //读取txt文件到image数组中
- initial begin
- $readmemh("../../matlab_src/image_720_1280_3.txt", image);
- end
-
- // 行扫描计数器
- always@(posedge i_clk)
- begin
- if(h_syn_cnt == H_TOTAL_TIME-1)
- h_syn_cnt <= 0;
- else
- h_syn_cnt <= h_syn_cnt + 1;
- end
-
- // 列扫描计数器
- always@(posedge i_clk)
- begin
- if(h_syn_cnt == H_TOTAL_TIME-1)
- begin
- if(v_syn_cnt == V_TOTAL_TIME-1)
- v_syn_cnt <= 0;
- else
- v_syn_cnt <= v_syn_cnt + 1;
- end
- end
-
- // 行同步控制
- always@(posedge i_clk)
- begin
- if(h_syn_cnt < H_SYNC_TIME)
- o_hsyn <= 0;
- else
- o_hsyn <= 1;
- end
-
- // 场同步控制
- always@(posedge i_clk)
- begin
- if(v_syn_cnt < V_SYNC_TIME)
- o_vsyn <= 0;
- else
- o_vsyn <= 1;
- end
-
- // 坐标使能.
- always@(posedge i_clk)
- begin
- if(v_syn_cnt >= V_SYNC_TIME + V_BACK_PORCH && v_syn_cnt < V_SYNC_TIME + V_BACK_PORCH + V_ACTIVE)
- begin
- if(h_syn_cnt >= H_SYNC_TIME + H_BACK_PORCH && h_syn_cnt < H_SYNC_TIME + H_BACK_PORCH + H_ACTIVE)
- en <= 1;
- else
- en <= 0;
- end
- else
- en <= 0;
- end
-
- always@(posedge i_clk)
- begin
- if(en)
- begin
- o_r <= image[image_cnt][23:16];
- o_g <= image[image_cnt][15:8];
- o_b <= image[image_cnt][7:0];
- image_cnt <= image_cnt + 1;
- end
- else if(image_cnt == H_ACTIVE*V_ACTIVE)
- begin
- o_r <= 8'h00;
- o_g <= 8'h00;
- o_b <= 8'h00;
- image_cnt <= 'd0;
- end
- else
- begin
- o_r <= 8'h00;
- o_g <= 8'h00;
- o_b <= 8'h00;
- image_cnt <= image_cnt;
- end
- end
-
- always@(posedge i_clk)
- begin
- o_en <= en;
- end
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- reg clk;
- reg rst_n;
-
- integer image_txt;
-
- reg [31:0] pixel_cnt;
- wire[23:0] data;
- wire de;
-
-
- top u_top
- (
- .i_clk (clk ),
- .i_rst_n (rst_n ),
- .o_gray_data (data ),
- .o_gray_de (de )
- );
-
- always #(1) clk = ~clk;
-
- initial
- begin
- clk = 1;
- rst_n = 0;
- #100
- rst_n = 1;
-
- end
-
- initial
- begin
- image_txt = $fopen("../matlab_src/image_720_1280_3_out.txt");
- end
-
- always@(posedge clk or negedge rst_n)
- begin
- if(!rst_n)
- begin
- pixel_cnt <= 0;
- end
- else if(de)
- begin
- pixel_cnt = pixel_cnt + 1;
- $fwrite(image_txt,"%h\n",data);
- end
- end
-
- always@(posedge clk )
- begin
- if(pixel_cnt == 720*1280)
- begin
- $display("*******************************************************************************");
- $display("*** Success:image_720_1280_3_out.txt is output complete! %t", $realtime, "ps***");
- $display("*******************************************************************************");
- $fclose(image_txt);
- $stop;
- end
- end
-
- endmodule
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3.2.2Modelsim实验结果- clear;clear all;clc;
-
- row = 720;
- col = 1280;
- n = 3;
-
- image_sim_pass = uint8(zeros(row,col,n));
- fid = fopen('image_720_1280_3_out.txt','r');
- for x = 1:row
- for y = 1:col
- RGB = fscanf(fid,'%s',1);
- image_sim_pass(x,y,1) = uint8(hex2dec(RGB(1:2)));
- image_sim_pass(x,y,2) = uint8(hex2dec(RGB(3:4)));
- image_sim_pass(x,y,3) = uint8(hex2dec(RGB(5:6)));
- end
- end
- fclose(fid);
-
- image_1 = imread('lena_1280x720.jpg');
-
- subplot(121);
- imshow(image_1), title('The original image');
-
- subplot(122);
- imshow(image_sim_pass),title('After processing images');
-
- imwrite(image_sim_pass,'lena_1280x720_sim_pass.jpg');
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4工程实现4.1Verilog代码分析- parameter GAMMA_ALGORITHM = "GAMMA_SQRT";//"GAMMA_SQUARE"
-
- //同步输出使能信号
- assign o_hs = i_hsyn;
- assign o_vs = i_vsyn;
- assign o_en = i_en;
- 参数选择综合
- generate
- if (GAMMA_ALGORITHM == "GAMMA_SQUARE")
- begin
- image_rom_gamma_square_para u_i_r
- (
- .clka (i_clk ),
- .addra (i_r ),
- .ena (1'b1 ),
- .douta (o_r )
- );
-
- image_rom_gamma_square_para u_i_g
- (
- .clka (i_clk ),
- .addra (i_g ),
- .ena (1'b1 ),
- .douta (o_g )
- );
-
- image_rom_gamma_square_para u_i_b
- (
- .clka (i_clk ),
- .addra (i_b ),
- .ena (1'b1 ),
- .douta (o_b )
- );
- end
- else if(GAMMA_ALGORITHM == "GAMMA_SQRT")
- begin
- image_rom_gamma_sqrt_para u_i_r
- (
- .clka (i_clk ),
- .addra (i_r ),
- .ena (1'b1 ),
- .douta (o_r )
- );
-
- image_rom_gamma_sqrt_para u_i_g
- (
- .clka (i_clk ),
- .addra (i_b ),
- .ena (1'b1 ),
- .douta (o_g )
- );
-
- image_rom_gamma_sqrt_para u_i_b
- (
- .clka (i_clk ),
- .addra (i_g ),
- .ena (1'b1 ),
- .douta (o_b )
- );
- end
- endgenerate
- sqrt_para查表数据
- module image_rom_gamma_sqrt_para
- (
- input clka,
- input [7:0] addra,
- input ena,
- output [7:0] douta
- );
- reg [7:0] DATA;
- assign douta = DATA;
- always@(*)
- begin
- case(addra)
- 0 : DATA <= 0;
- 1 : DATA <= 16;
- 2 : DATA <= 23;
- 3 : DATA <= 28;
- 4 : DATA <= 32;
- 5 : DATA <= 36;
- 6 : DATA <= 39;
- 7 : DATA <= 42;
- 8 : DATA <= 45;
- 9 : DATA <= 48;
- 10 : DATA <= 51;
- 11 : DATA <= 53;
- 12 : DATA <= 55;
- 13 : DATA <= 58;
- 14 : DATA <= 60;
- 15 : DATA <= 62;
- 16 : DATA <= 64;
- 17 : DATA <= 66;
- 18 : DATA <= 68;
- 19 : DATA <= 70;
- 20 : DATA <= 72;
- 21 : DATA <= 73;
- 22 : DATA <= 75;
- 23 : DATA <= 77;
- 24 : DATA <= 78;
- 25 : DATA <= 80;
- 26 : DATA <= 82;
- 27 : DATA <= 83;
- 28 : DATA <= 85;
- 29 : DATA <= 86;
- 30 : DATA <= 88;
- 31 : DATA <= 89;
- 32 : DATA <= 91;
- 33 : DATA <= 92;
- 34 : DATA <= 93;
- 35 : DATA <= 95;
- 36 : DATA <= 96;
- 37 : DATA <= 97;
- 38 : DATA <= 99;
- 39 : DATA <= 100;
- 40 : DATA <= 101;
- 41 : DATA <= 102;
- 42 : DATA <= 104;
- 43 : DATA <= 105;
- 44 : DATA <= 106;
- 45 : DATA <= 107;
- 46 : DATA <= 109;
- 47 : DATA <= 110;
- 48 : DATA <= 111;
- 49 : DATA <= 112;
- 50 : DATA <= 113;
- 51 : DATA <= 114;
- 52 : DATA <= 115;
- 53 : DATA <= 116;
- 54 : DATA <= 118;
- 55 : DATA <= 119;
- 56 : DATA <= 120;
- 57 : DATA <= 121;
- 58 : DATA <= 122;
- 59 : DATA <= 123;
- 60 : DATA <= 124;
- 61 : DATA <= 125;
- 62 : DATA <= 126;
- 63 : DATA <= 127;
- 64 : DATA <= 128;
- 65 : DATA <= 129;
- 66 : DATA <= 130;
- 67 : DATA <= 131;
- 68 : DATA <= 132;
- 69 : DATA <= 133;
- 70 : DATA <= 134;
- 71 : DATA <= 135;
- 72 : DATA <= 136;
- 73 : DATA <= 137;
- 74 : DATA <= 138;
- 75 : DATA <= 139;
- 76 : DATA <= 139;
- 77 : DATA <= 140;
- 78 : DATA <= 141;
- 79 : DATA <= 142;
- 80 : DATA <= 143;
- 81 : DATA <= 144;
- 82 : DATA <= 145;
- 83 : DATA <= 146;
- 84 : DATA <= 147;
- 85 : DATA <= 148;
- 86 : DATA <= 148;
- 87 : DATA <= 149;
- 88 : DATA <= 150;
- 89 : DATA <= 151;
- 90 : DATA <= 152;
- 91 : DATA <= 153;
- 92 : DATA <= 153;
- 93 : DATA <= 154;
- 94 : DATA <= 155;
- 95 : DATA <= 156;
- 96 : DATA <= 157;
- 97 : DATA <= 158;
- 98 : DATA <= 158;
- 99 : DATA <= 159;
- 100 : DATA <= 160;
- 101 : DATA <= 161;
- 102 : DATA <= 162;
- 103 : DATA <= 162;
- 104 : DATA <= 163;
- 105 : DATA <= 164;
- 106 : DATA <= 165;
- 107 : DATA <= 166;
- 108 : DATA <= 166;
- 109 : DATA <= 167;
- 110 : DATA <= 168;
- 111 : DATA <= 169;
- 112 : DATA <= 169;
- 113 : DATA <= 170;
- 114 : DATA <= 171;
- 115 : DATA <= 172;
- 116 : DATA <= 172;
- 117 : DATA <= 173;
- 118 : DATA <= 174;
- 119 : DATA <= 175;
- 120 : DATA <= 175;
- 121 : DATA <= 176;
- 122 : DATA <= 177;
- 123 : DATA <= 177;
- 124 : DATA <= 178;
- 125 : DATA <= 179;
- 126 : DATA <= 180;
- 127 : DATA <= 180;
- 128 : DATA <= 181;
- 129 : DATA <= 182;
- 130 : DATA <= 182;
- 131 : DATA <= 183;
- 132 : DATA <= 184;
- 133 : DATA <= 185;
- 134 : DATA <= 185;
- 135 : DATA <= 186;
- 136 : DATA <= 187;
- 137 : DATA <= 187;
- 138 : DATA <= 188;
- 139 : DATA <= 189;
- 140 : DATA <= 189;
- 141 : DATA <= 190;
- 142 : DATA <= 191;
- 143 : DATA <= 191;
- 144 : DATA <= 192;
- 145 : DATA <= 193;
- 146 : DATA <= 193;
- 147 : DATA <= 194;
- 148 : DATA <= 195;
- 149 : DATA <= 195;
- 150 : DATA <= 196;
- 151 : DATA <= 197;
- 152 : DATA <= 197;
- 153 : DATA <= 198;
- 154 : DATA <= 199;
- 155 : DATA <= 199;
- 156 : DATA <= 200;
- 157 : DATA <= 200;
- 158 : DATA <= 201;
- 159 : DATA <= 202;
- 160 : DATA <= 202;
- 161 : DATA <= 203;
- 162 : DATA <= 204;
- 163 : DATA <= 204;
- 164 : DATA <= 205;
- 165 : DATA <= 206;
- 166 : DATA <= 206;
- 167 : DATA <= 207;
- 168 : DATA <= 207;
- 169 : DATA <= 208;
- 170 : DATA <= 209;
- 171 : DATA <= 209;
- 172 : DATA <= 210;
- 173 : DATA <= 210;
- 174 : DATA <= 211;
- 175 : DATA <= 212;
- 176 : DATA <= 212;
- 177 : DATA <= 213;
- 178 : DATA <= 213;
- 179 : DATA <= 214;
- 180 : DATA <= 215;
- 181 : DATA <= 215;
- 182 : DATA <= 216;
- 183 : DATA <= 216;
- 184 : DATA <= 217;
- 185 : DATA <= 218;
- 186 : DATA <= 218;
- 187 : DATA <= 219;
- 188 : DATA <= 219;
- 189 : DATA <= 220;
- 190 : DATA <= 221;
- 191 : DATA <= 221;
- 192 : DATA <= 222;
- 193 : DATA <= 222;
- 194 : DATA <= 223;
- 195 : DATA <= 223;
- 196 : DATA <= 224;
- 197 : DATA <= 225;
- 198 : DATA <= 225;
- 199 : DATA <= 226;
- 200 : DATA <= 226;
- 201 : DATA <= 227;
- 202 : DATA <= 227;
- 203 : DATA <= 228;
- 204 : DATA <= 229;
- 205 : DATA <= 229;
- 206 : DATA <= 230;
- 207 : DATA <= 230;
- 208 : DATA <= 231;
- 209 : DATA <= 231;
- 210 : DATA <= 232;
- 211 : DATA <= 232;
- 212 : DATA <= 233;
- 213 : DATA <= 234;
- 214 : DATA <= 234;
- 215 : DATA <= 235;
- 216 : DATA <= 235;
- 217 : DATA <= 236;
- 218 : DATA <= 236;
- 219 : DATA <= 237;
- 220 : DATA <= 237;
- 221 : DATA <= 238;
- 222 : DATA <= 238;
- 223 : DATA <= 239;
- 224 : DATA <= 239;
- 225 : DATA <= 240;
- 226 : DATA <= 241;
- 227 : DATA <= 241;
- 228 : DATA <= 242;
- 229 : DATA <= 242;
- 230 : DATA <= 243;
- 231 : DATA <= 243;
- 232 : DATA <= 244;
- 233 : DATA <= 244;
- 234 : DATA <= 245;
- 235 : DATA <= 245;
- 236 : DATA <= 246;
- 237 : DATA <= 246;
- 238 : DATA <= 247;
- 239 : DATA <= 247;
- 240 : DATA <= 248;
- 241 : DATA <= 248;
- 242 : DATA <= 249;
- 243 : DATA <= 249;
- 244 : DATA <= 250;
- 245 : DATA <= 250;
- 246 : DATA <= 251;
- 247 : DATA <= 251;
- 248 : DATA <= 252;
- 249 : DATA <= 252;
- 250 : DATA <= 253;
- 251 : DATA <= 253;
- 252 : DATA <= 254;
- 253 : DATA <= 254;
- 254 : DATA <= 255;
- 255 : DATA <= 255;
- default: DATA<= 0;
- endcase
- end
- endmodule
- square_para查表数据
- module image_rom_gamma_square_para
- (
- input clka,
- input [7:0] addra,
- input ena,
- output [7:0] douta
- );
- reg [7:0] DATA;
- assign douta = DATA;
- always@(*)
- begin
- case(addra)
- 0 : DATA <= 0;
- 1 : DATA <= 0;
- 2 : DATA <= 0;
- 3 : DATA <= 0;
- 4 : DATA <= 0;
- 5 : DATA <= 0;
- 6 : DATA <= 0;
- 7 : DATA <= 0;
- 8 : DATA <= 0;
- 9 : DATA <= 0;
- 10 : DATA <= 0;
- 11 : DATA <= 0;
- 12 : DATA <= 1;
- 13 : DATA <= 1;
- 14 : DATA <= 1;
- 15 : DATA <= 1;
- 16 : DATA <= 1;
- 17 : DATA <= 1;
- 18 : DATA <= 1;
- 19 : DATA <= 1;
- 20 : DATA <= 2;
- 21 : DATA <= 2;
- 22 : DATA <= 2;
- 23 : DATA <= 2;
- 24 : DATA <= 2;
- 25 : DATA <= 2;
- 26 : DATA <= 3;
- 27 : DATA <= 3;
- 28 : DATA <= 3;
- 29 : DATA <= 3;
- 30 : DATA <= 4;
- 31 : DATA <= 4;
- 32 : DATA <= 4;
- 33 : DATA <= 4;
- 34 : DATA <= 5;
- 35 : DATA <= 5;
- 36 : DATA <= 5;
- 37 : DATA <= 5;
- 38 : DATA <= 6;
- 39 : DATA <= 6;
- 40 : DATA <= 6;
- 41 : DATA <= 7;
- 42 : DATA <= 7;
- 43 : DATA <= 7;
- 44 : DATA <= 8;
- 45 : DATA <= 8;
- 46 : DATA <= 8;
- 47 : DATA <= 9;
- 48 : DATA <= 9;
- 49 : DATA <= 9;
- 50 : DATA <= 10;
- 51 : DATA <= 10;
- 52 : DATA <= 11;
- 53 : DATA <= 11;
- 54 : DATA <= 11;
- 55 : DATA <= 12;
- 56 : DATA <= 12;
- 57 : DATA <= 13;
- 58 : DATA <= 13;
- 59 : DATA <= 14;
- 60 : DATA <= 14;
- 61 : DATA <= 15;
- 62 : DATA <= 15;
- 63 : DATA <= 16;
- 64 : DATA <= 16;
- 65 : DATA <= 17;
- 66 : DATA <= 17;
- 67 : DATA <= 18;
- 68 : DATA <= 18;
- 69 : DATA <= 19;
- 70 : DATA <= 19;
- 71 : DATA <= 20;
- 72 : DATA <= 20;
- 73 : DATA <= 21;
- 74 : DATA <= 21;
- 75 : DATA <= 22;
- 76 : DATA <= 23;
- 77 : DATA <= 23;
- 78 : DATA <= 24;
- 79 : DATA <= 24;
- 80 : DATA <= 25;
- 81 : DATA <= 26;
- 82 : DATA <= 26;
- 83 : DATA <= 27;
- 84 : DATA <= 28;
- 85 : DATA <= 28;
- 86 : DATA <= 29;
- 87 : DATA <= 30;
- 88 : DATA <= 30;
- 89 : DATA <= 31;
- 90 : DATA <= 32;
- 91 : DATA <= 32;
- 92 : DATA <= 33;
- 93 : DATA <= 34;
- 94 : DATA <= 35;
- 95 : DATA <= 35;
- 96 : DATA <= 36;
- 97 : DATA <= 37;
- 98 : DATA <= 38;
- 99 : DATA <= 38;
- 100 : DATA <= 39;
- 101 : DATA <= 40;
- 102 : DATA <= 41;
- 103 : DATA <= 42;
- 104 : DATA <= 42;
- 105 : DATA <= 43;
- 106 : DATA <= 44;
- 107 : DATA <= 45;
- 108 : DATA <= 46;
- 109 : DATA <= 47;
- 110 : DATA <= 47;
- 111 : DATA <= 48;
- 112 : DATA <= 49;
- 113 : DATA <= 50;
- 114 : DATA <= 51;
- 115 : DATA <= 52;
- 116 : DATA <= 53;
- 117 : DATA <= 54;
- 118 : DATA <= 55;
- 119 : DATA <= 56;
- 120 : DATA <= 56;
- 121 : DATA <= 57;
- 122 : DATA <= 58;
- 123 : DATA <= 59;
- 124 : DATA <= 60;
- 125 : DATA <= 61;
- 126 : DATA <= 62;
- 127 : DATA <= 63;
- 128 : DATA <= 64;
- 129 : DATA <= 65;
- 130 : DATA <= 66;
- 131 : DATA <= 67;
- 132 : DATA <= 68;
- 133 : DATA <= 69;
- 134 : DATA <= 70;
- 135 : DATA <= 71;
- 136 : DATA <= 73;
- 137 : DATA <= 74;
- 138 : DATA <= 75;
- 139 : DATA <= 76;
- 140 : DATA <= 77;
- 141 : DATA <= 78;
- 142 : DATA <= 79;
- 143 : DATA <= 80;
- 144 : DATA <= 81;
- 145 : DATA <= 82;
- 146 : DATA <= 84;
- 147 : DATA <= 85;
- 148 : DATA <= 86;
- 149 : DATA <= 87;
- 150 : DATA <= 88;
- 151 : DATA <= 89;
- 152 : DATA <= 91;
- 153 : DATA <= 92;
- 154 : DATA <= 93;
- 155 : DATA <= 94;
- 156 : DATA <= 95;
- 157 : DATA <= 97;
- 158 : DATA <= 98;
- 159 : DATA <= 99;
- 160 : DATA <= 100;
- 161 : DATA <= 102;
- 162 : DATA <= 103;
- 163 : DATA <= 104;
- 164 : DATA <= 105;
- 165 : DATA <= 107;
- 166 : DATA <= 108;
- 167 : DATA <= 109;
- 168 : DATA <= 111;
- 169 : DATA <= 112;
- 170 : DATA <= 113;
- 171 : DATA <= 115;
- 172 : DATA <= 116;
- 173 : DATA <= 117;
- 174 : DATA <= 119;
- 175 : DATA <= 120;
- 176 : DATA <= 121;
- 177 : DATA <= 123;
- 178 : DATA <= 124;
- 179 : DATA <= 126;
- 180 : DATA <= 127;
- 181 : DATA <= 128;
- 182 : DATA <= 130;
- 183 : DATA <= 131;
- 184 : DATA <= 133;
- 185 : DATA <= 134;
- 186 : DATA <= 136;
- 187 : DATA <= 137;
- 188 : DATA <= 139;
- 189 : DATA <= 140;
- 190 : DATA <= 142;
- 191 : DATA <= 143;
- 192 : DATA <= 145;
- 193 : DATA <= 146;
- 194 : DATA <= 148;
- 195 : DATA <= 149;
- 196 : DATA <= 151;
- 197 : DATA <= 152;
- 198 : DATA <= 154;
- 199 : DATA <= 155;
- 200 : DATA <= 157;
- 201 : DATA <= 158;
- 202 : DATA <= 160;
- 203 : DATA <= 162;
- 204 : DATA <= 163;
- 205 : DATA <= 165;
- 206 : DATA <= 166;
- 207 : DATA <= 168;
- 208 : DATA <= 170;
- 209 : DATA <= 171;
- 210 : DATA <= 173;
- 211 : DATA <= 175;
- 212 : DATA <= 176;
- 213 : DATA <= 178;
- 214 : DATA <= 180;
- 215 : DATA <= 181;
- 216 : DATA <= 183;
- 217 : DATA <= 185;
- 218 : DATA <= 186;
- 219 : DATA <= 188;
- 220 : DATA <= 190;
- 221 : DATA <= 192;
- 222 : DATA <= 193;
- 223 : DATA <= 195;
- 224 : DATA <= 197;
- 225 : DATA <= 199;
- 226 : DATA <= 200;
- 227 : DATA <= 202;
- 228 : DATA <= 204;
- 229 : DATA <= 206;
- 230 : DATA <= 207;
- 231 : DATA <= 209;
- 232 : DATA <= 211;
- 233 : DATA <= 213;
- 234 : DATA <= 215;
- 235 : DATA <= 217;
- 236 : DATA <= 218;
- 237 : DATA <= 220;
- 238 : DATA <= 222;
- 239 : DATA <= 224;
- 240 : DATA <= 226;
- 241 : DATA <= 228;
- 242 : DATA <= 230;
- 243 : DATA <= 232;
- 244 : DATA <= 233;
- 245 : DATA <= 235;
- 246 : DATA <= 237;
- 247 : DATA <= 239;
- 248 : DATA <= 241;
- 249 : DATA <= 243;
- 250 : DATA <= 245;
- 251 : DATA <= 247;
- 252 : DATA <= 249;
- 253 : DATA <= 251;
- 254 : DATA <= 253;
- 255 : DATA <= 255;
- default: DATA<= 0;
- endcase
- end
- endmodule
复制代码
4.2工程结构图像数据通过摄像头采集进来,先缓存在fifo中,然后通过写状态机,将图像数据送进DDR进行缓存,缓存后的图像数据从DDR中取出,通过读状态机送出到fifo中,然后算法处理模块在fifo中取出数据,完成数据处理后送到LCD进行显示输出。 5上板实验
点击下载后,可以看到正常的输出如下所示,摄像头的分辨率为640x480
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