matlab一维条形码码字识别程序讲解学习

m a t l a b一维条形码码字识别程序close allI = imread('E:\txm.jpg');J= rgb2gray(I);figure(1)imshow(J);title('灰度化图像 ');[e1,e2]=size(J);Im=imcrop(J,[e2/2-200,e1/2-200,400,400]); figure(2)subplot(1,2,1),imshow(Im)title('中心区域 ');subplot(1,2,2),imhist(Im)title('中心区域直方图');[xa,ya]=size(Im);b=double(Im);zd=double(max(Im)) ;zx=double(min(Im)) ;T=double((zd+zx))/2;count=double(0);while 1count=count+1;S0=0.0; n0=0.0;S1=0.0; n1=0.0;for i=1:xafor j=1:yaif double(Im(i,j))>=TS1=S1+double(Im(i,j));n1=n1+1;elseS0=S0+double(Im(i,j));n0=n0+1;endendendT0=S0/n0;T1=S1/n1;if abs(T-((T0+T1)/2))<0.1break;elseT=(T0+T1)/2;endendcountTK=find(J<T);J(K)=0;K=find(J>=T);J(K)=255;figure(3)imshow(J)title(' 图像二值化 ');B=medfilt2(J,[5,1]);figure(4)imshow(B)title('中值滤波后图像');[y0,x0]=size(B);BW = edge(B,'log');figure(5);imshow(BW);title('边缘检测图像')%function code = barcode(pic) %条形码识别check_left = [13,25,19,61,35,49,47,59,55,11;... %左边数据编码，奇39,51,27,33,29,57, 5,17, 9,23]; %左边数据编码，偶check_right = [114,102,108,66,92,78,80,68,72,116]; %右边数据编码first_num = [31,20,18,17,12,6,3,10,9,5];%第一位数据编码bar = imread('E:\txm.jpg');%读输入条形码图片bar_Gray = rgb2gray(bar);%将RGB图片转换灰度图[a_hist x] = imhist(bar_Gray);hist_max = [];if a_hist(1)>a_hist(2)hist_max = [hist_max 1];endx = max(x);for i=2:xif a_hist(i)>a_hist(i-1) && a_hist(i)>a_hist(i+1)hist_max = [hist_max i];endendif a_hist(x)<a_hist(x+1)hist_max = [hist_max x+1];end[m,n] = size(hist_max);k = 0;max_1 = 0;max_2 = 0;for i=1:nif k<a_hist(hist_max(i))k = a_hist(hist_max(i));max_1 = hist_max(i);endendtemp = a_hist(max_1);a_hist(max_1) = 0;k = 0;for i=1:nif k<a_hist(hist_max(i))k = a_hist(hist_max(i));max_2 = hist_max(i);endenda_hist(max_1) = temp;if max_1>max_2k = max_1;max_1 = max_2;max_2 = k;endT = max_1;k = a_hist(max_1);for i=max_1:max_2if k>a_hist(i)k = a_hist(i);T = i;endend[m,n] = size(bar_Gray); %求灰度图的大小for i=1:m %对图像进行二值化处理for j=1:nif bar_Gray(i,j)>T%选择适当的阈值进行二值化处理bar_10(i,j) = 1;elsebar_10(i,j) = 0;endendend%imshow(bar_10);l = 0;%检测59根条形码for i=1:mk = 1;l = l+1;for j=1:n-1if bar_10(i,j)~=bar_10(i,j+1)%比较同一行相邻两点的颜色是否一致%bar_x(l,k) = i;bar_y(l,k) = j; %记录转折点的纵坐标k = k+1;%准备记录下一个数据点endif k>61 %点数大于60，该行应该删掉l = l-1;breakendendif k<61 %点数小于60，该行应该删掉l = l-1;endend[m,n] = size(bar_y);if m<=1 %查看条形码是否有效code = '0';fprintf(1,'GameOver!\n');returnendfor i=1:m%计算每根条形码的宽度for j=1:n-1bar_num(i,j) = bar_y(i,j+1) - bar_y(i,j);if bar_num(i,j)<0bar_num(i,j) = 0;endendendbar_sum = sum(bar_num)/m;%求每根条形码宽度的平均值k = 0;for i=1:59%计算59根条形码的总宽度k = k + bar_sum(i);endk = k/95;%计算单位条形码的宽度for i=1:59%计算每根条形码所占位数bar_int(i) = round(bar_sum(i)/k);endk = 1;for i=1:59%将条形码转换成二进制数if rem(i,2)for j=1:bar_int(i)%黑色条用1表示bar_01(k) = 1;k = k+1;endelsefor j=1:bar_int(i) %白色条用0表示bar_01(k) = 0;k = k+1;endendendif ((bar_01(1)&&~bar_01(2)&&bar_01(3))...%判断起始符是否正确&&(~bar_01(46)&&bar_01(47)&&~bar_01(48)&&bar_01(49)&&~bar_01(50))... %判断中间分隔符是否正确&&(bar_01(95)&&~bar_01(94)&&bar_01(93))) %判断终止符是否正确l = 1;for i=1:6 %将左侧42位二进制数转换为十进制数bar_left(l) = 0;for k=1:7bar_left(l) = bar_left(l)+bar_01(7*(i-1)+k+3)*(2^(7-k));endendl = 1;for i=1:6 %将右侧42位二进制数转换为十进制数bar_right(l) = 0;for k=1:7bar_right(l) = bar_right(l)+bar_01(7*(i+6)+k+1)*(2^(7-k)); k = k-1;endl = l+1;endendnum_bar = '';num_first = 0;first = 2;for i=1:6%从左边数据编码表中查出条形码编码数字for j=0:1for k=0:9if bar_left(i)==check_left(j+1,k+1)num_bar = strcat(num_bar , num2str(k));switch first%记录左边数据的奇偶顺序case 2first = j;break;case 1num_first = num_first + j*(2^(6-i));break;case 0num_first = num_first + ~j*(2^(6-i));break;otherwisebreak;endendendendendfor i=1:6%从右边数据编码表中查出条形码编码数字if bar_right(i)==check_right(j+1)num_bar = strcat(num_bar , num2str(j));endendendfor i=0:9%从第一位数据编码表中查出第一位数字if num_first==first_num(i+1)num_bar = strcat(num2str(i) , num_bar);break;endendif numel(num_bar)~=13fprintf(1,'Please Turn It Around!\n');returnendcheck_code = 0;for i=1:12 %计算校验码if rem(i,2)check_code = check_code + str2double(num_bar(i));elsecheck_code = check_code + str2double(num_bar(i))*3;endendcheck_code = rem(check_code,10);if check_code>0check_code = 10 - check_code;endif check_code==str2double(num_bar(13)) %判断校验码是否正确code = num_bar;elsefprintf(1,'Please Turn It Around!\n');returnend。