【分享】一个FPGA实现sobel边缘检测的例子(含matlab和verilog源码)

img_txt.m

clear all
close all
clc
img1 = imread('sobel.jpg');
img2 = imread('sobel.jpg');
img3 = imread('sobel.jpg');
img4 = imread('sobel.jpg');
img5 = imread('sobel.jpg');

R1=img1(:,:,1);
G1=img1(:,:,2);
B1=img1(:,:,3);

R2=img2(:,:,1);
G2=img2(:,:,2);
B2=img2(:,:,3);

R3=img3(:,:,1);
G3=img3(:,:,2);
B3=img3(:,:,3);

R4=img4(:,:,1);
G4=img4(:,:,2);
B4=img4(:,:,3);

R5=img5(:,:,1);
G5=img5(:,:,2);
B5=img5(:,:,3);

%**************************
[a,b,c]= size(img1);
fidR1= fopen('R_frame1.txt','w');
fidG1= fopen('G_frame1.txt','w');
fidB1= fopen('B_frame1.txt','w');

fidR2= fopen('R_frame2.txt','w');
fidG2= fopen('G_frame2.txt','w');
fidB2= fopen('B_frame2.txt','w');

fidR3= fopen('R_frame3.txt','w');
fidG3= fopen('G_frame3.txt','w');
fidB3= fopen('B_frame3.txt','w');

fidR4= fopen('R_frame4.txt','w');
fidG4= fopen('G_frame4.txt','w');
fidB4= fopen('B_frame4.txt','w');

fidR5= fopen('R_frame5.txt','w');
fidG5= fopen('G_frame5.txt','w');
fidB5= fopen('B_frame5.txt','w');

for i=1:a
    for j= 1:b
      fprintf(fidR1,'%d\n',R1(i,j)); %frame1
      fprintf(fidG1,'%d\n',G1(i,j));
      fprintf(fidB1,'%d\n',B1(i,j));

      fprintf(fidR2,'%d\n',R2(i,j)); %frame2
      fprintf(fidG2,'%d\n',G2(i,j));
      fprintf(fidB2,'%d\n',B2(i,j));

      fprintf(fidR3,'%d\n',R3(i,j)); %frame3
      fprintf(fidG3,'%d\n',G3(i,j));
      fprintf(fidB3,'%d\n',B3(i,j));

      fprintf(fidR4,'%d\n',R4(i,j)); %frame4
      fprintf(fidG4,'%d\n',G4(i,j));
      fprintf(fidB4,'%d\n',B4(i,j));

      fprintf(fidR5,'%d\n',R5(i,j)); %frame5
      fprintf(fidG5,'%d\n',G5(i,j));
      fprintf(fidB5,'%d\n',B5(i,j));
    end
end

fclose(fidR1);
fclose(fidG1);
fclose(fidB1);

fclose(fidR2);
fclose(fidG2);
fclose(fidB2);

fclose(fidR3);
fclose(fidG3);
fclose(fidB3);

fclose(fidR4);
fclose(fidG4);
fclose(fidB4);

fclose(fidR5);
fclose(fidG5);
fclose(fidB5);
figure,
subplot(331),imshow(img1),title('img1');
subplot(332),imshow(img2),title('img2');
subplot(333),imshow(img3),title('img3');
subplot(334),imshow(img4),title('img4');
subplot(335),imshow(img5),title('img5');

txt_img.m

clear all
close all
clc
img = imread('sobel.jpg');
[a,b,c]= size(img);

img2R = uint8(textread('Result_Frame1_R.txt','%u'));
img2G = uint8(textread('Result_Frame1_G.txt','%u'));
img2B = uint8(textread('Result_Frame1_B.txt','%u'));

img3R = uint8(textread('Result_Frame2_R.txt','%u'));
img3G = uint8(textread('Result_Frame2_G.txt','%u'));
img3B = uint8(textread('Result_Frame2_B.txt','%u'));

img4R = uint8(textread('Result_Frame3_R.txt','%u'));
img4G = uint8(textread('Result_Frame3_G.txt','%u'));
img4B = uint8(textread('Result_Frame3_B.txt','%u'));

img5R = uint8(textread('Result_Frame4_R.txt','%u'));
img5G = uint8(textread('Result_Frame4_G.txt','%u'));
img5B = uint8(textread('Result_Frame4_B.txt','%u'));

img6R = uint8(textread('Result_Frame5_R.txt','%u'));
img6G = uint8(textread('Result_Frame5_G.txt','%u'));
img6B = uint8(textread('Result_Frame5_B.txt','%u'));


img2(:,:,1) = reshape(img2R,[b,a]);
img2(:,:,2) = reshape(img2G,[b,a]);
img2(:,:,3) = reshape(img2B,[b,a]);

img3(:,:,1) = reshape(img3R,[b,a]);
img3(:,:,2) = reshape(img3G,[b,a]);
img3(:,:,3) = reshape(img3B,[b,a]);

img4(:,:,1) = reshape(img4R,[b,a]);
img4(:,:,2) = reshape(img4G,[b,a]);
img4(:,:,3) = reshape(img4B,[b,a]);

img5(:,:,1) = reshape(img5R,[b,a]);
img5(:,:,2) = reshape(img5G,[b,a]);
img5(:,:,3) = reshape(img5B,[b,a]);

img6(:,:,1) = reshape(img6R,[b,a]);
img6(:,:,2) = reshape(img6G,[b,a]);
img6(:,:,3) = reshape(img6B,[b,a]);

figure,
subplot(331),imshow(img),title('img');
subplot(332),imshow(fliplr(imrotate(img2,-90))),title('img2');
subplot(333),imshow(fliplr(imrotate(img3,-90))),title('img3');
subplot(334),imshow(fliplr(imrotate(img4,-90))),title('img4');
subplot(335),imshow(fliplr(imrotate(img5,-90))),title('img5');
subplot(336),imshow(fliplr(imrotate(img6,-90))),title('img6');

figure,imshow(fliplr(imrotate(img6,-90))),title('img6');

sobel.jpg

FPGA 的verilog源码如下

vga_parameter.vh
vga_ctl.v
tb_image.v
Sobel.v
rgb2ycbcr.v
linebuffer.v
line.v
imwrite_frame5.v
imwrite_frame4.v
imwrite_frame3.v
imwrite_frame2.v
imread_frame1.v
fifo_linebuffer.v