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Feature_Extraction_SpO2.m

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+clear;
+clc;
+close all;
+format short
+
+mypath1 = '..\Forehead_Att\Forehead\Day1\03\';
+info1 = dir(mypath1);
+
+mypath2 = '..\Forehead_Amp\Forehead\Day1\03\';
+info2 = dir(mypath2);
+
+mypath3 = '..\Left_Cheek_Att\Left_Cheek\Day1\03\';
+info3 = dir(mypath3);
+
+mypath4 = '..\Left_Cheek_Amp\Left_Cheek\Day1\03\';
+info4 = dir(mypath4);
+
+mypath5 = '..\Right_Cheek_Att\Right_Cheek\Day1\03\';
+info5 = dir(mypath5);
+
+mypath6 = '..\Right_Cheek_Amp\Right_Cheek\Day1\03\';
+info6 = dir(mypath6);
+
+M =[];
+channel_sel = 2;
+
+for i = 1:length(info4)-2
+
+    str1 = string(mypath1);
+    str2 = string(info1(i+2).name);
+    str = strcat(str1,str2);
+    vidObj = VideoReader(str);
+    allFrames1 = read(vidObj);
+    var1 = vidObj.Duration*vidObj.FrameRate;
+
+    str1 = string(mypath2);
+    str2 = string(info2(i+2).name);
+    str = strcat(str1,str2);
+    vidObj = VideoReader(str);
+    allFrames2 = read(vidObj);
+    var2 = vidObj.Duration*vidObj.FrameRate;
+
+    str1 = string(mypath3);
+    str2 = string(info3(i+2).name);
+    str = strcat(str1,str2);
+    vidObj = VideoReader(str);
+    allFrames3 = read(vidObj);
+    var3 = vidObj.Duration*vidObj.FrameRate;
+
+    str1 = string(mypath4);
+    str2 = string(info4(i+2).name);
+    str = strcat(str1,str2);
+    vidObj = VideoReader(str);
+    allFrames4 = read(vidObj);
+    var4 = vidObj.Duration*vidObj.FrameRate;
+
+    str1 = string(mypath5);
+    str2 = string(info5(i+2).name);
+    str = strcat(str1,str2);
+    vidObj = VideoReader(str);
+    allFrames5 = read(vidObj);
+    var5 = vidObj.Duration*vidObj.FrameRate;
+
+    str1 = string(mypath6);
+    str2 = string(info6(i+2).name);
+    str = strcat(str1,str2);
+    vidObj = VideoReader(str);
+    allFrames6 = read(vidObj);
+    var6 = vidObj.Duration*vidObj.FrameRate;
+
+    varm1 = min([var1,var2]);
+    varm2 = min([var3,var4]);
+    varm3 = min([var5,var6]);    
+
+    for j=1:varm1
+        if channel_sel==2
+            G1 = rgb2gray(allFrames2(:,:,:,j));
+        else
+            G1 = rgb2gray(allFrames1(:,:,:,j)) + rgb2gray(allFrames2(:,:,:,j));
+        end
+        G1 = im2double(G1);
+        meanG1(j) = mean(G1(:));
+        stdevG1(j) = std(G1(:));   
+    end
+
+    for j=1:varm2
+        if channel_sel==2
+            G2 = rgb2gray(allFrames4(:,:,:,j));
+        else
+            G2 = rgb2gray(allFrames3(:,:,:,j)) + rgb2gray(allFrames4(:,:,:,j));
+        end
+        G2 = im2double(G2);
+        meanG2(j) = mean(G2(:));
+        stdevG2(j) = std(G2(:));
+    end
+
+    for j=1:varm3
+        if channel_sel==2
+            G3 = rgb2gray(allFrames6(:,:,:,j));
+        else
+            G3 = rgb2gray(allFrames5(:,:,:,j)) + rgb2gray(allFrames6(:,:,:,j));
+        end
+        G3 = im2double(G3);
+        meanG3(j) = mean(G3(:));
+        stdevG3(j) = std(G3(:));
+    end
+
+    temp_1 = mean(meanG1(:));
+    temp_2 = mean(stdevG1(:));
+    temp_3 = std(meanG1(:));
+    temp_4 = std(stdevG1(:));
+
+    temp_5 = mean(meanG2(:));
+    temp_6 = mean(stdevG2(:));
+    temp_7 = std(meanG2(:));
+    temp_8 = std(stdevG2(:));
+
+    temp_9 = mean(meanG3(:));
+    temp_10 = mean(stdevG3(:));
+    temp_11 = std(meanG3(:));
+    temp_12 = std(stdevG3(:));
+
+    M = [M;temp_1 temp_2 temp_3 temp_4 temp_5 temp_6 temp_7 temp_8 temp_9 temp_10 temp_11 temp_12];
+
+end
+xlswrite('filename_12vars_3rd_group_mag.xlsx',M)