i'm currently doing a project on drowsiness detection using image processing and EEG signals. right now i have got samples of EEG database from one of the hospitals for my references. now please tel me how to read these databases in matlab

this is samples that i got from hospital. Pz-P4 electrodes are used for drowsy detection.

Answer 1

[Image Analyst]

You will have to ask the maker of the EEG instrument for the format of the file. Also ask if they have MATLAB code to read it. If you're lucky they will. Or see if that program you have a screenshot of can export the data into some common format like an Excel workbook or a csv file.

[pawan gupta]

Hi,can anybody tell me about the algorithm which is used in the following code? like viola jones,template matching etc.

it would be greatly appericiated if u could help me. thank you!!!

clc clear all; close all;

% initialize webcam (read instructions if required 'README_TO_SET_YOUR_CAMERA.m')

vobj=videoinput('winvideo',1,'YUY2_640x480','ReturnedColorSpace','rgb'); figure('Name','My Custom Preview Window'); uicontrol('string','close','callback','close(gcf)');

% create an image object for previewing

vidRes=get(vobj,'VideoResolution'); nBands=get(vobj,'NumberOfBands'); hImage=image(zeros(vidRes(2),vidRes(1),nBands)); preview(vobj,hImage);

%pause % coordinates to draw lines

rs=vidRes(2); cs=vidRes(1); C1=floor(cs/6); C2=floor(267*cs/320);

C3=floor(0); C4=floor(cs);

R1=floor(rs/4); R2=floor(rs/2); R3=floor(3*rs/4); R4=floor(rs);

x1=[C1 C1]; x2=[C2 C2]; x3=[C3 C3]; x4=[C4 C4];

x5=[C3 C4];

y1=[0 rs]; y2=[R1 R1]; y3=[R2 R2]; y4=[R3 R3]; y5=[R4 R4];

%draw lines

line(x1,y1,'color','r','LineWidth',1.5) line(x2,y1,'color','r','LineWidth',1.5)

%line(x3,y1,'color','g','LineWidth',2) %line(x4,y1,'color','g','LineWidth',2)

line(x5,y2,'color','g','LineWidth',1.5) line(x5,y3,'color','g','LineWidth',1.5) line(x5,y4,'color','g','LineWidth',1.5)

%line(x5,y5,'color','w','LineWidth',2)

% write text

text1=text(19*cs/96,rs/8,'FOREHEAD REGION','color','r'); text2=text(19*cs/96,3*rs/8,'EYE REGION','color','r'); text3=text(19*cs/96,5*rs/8,'NOSE REGION','color','r'); text4=text(19*cs/96,7*rs/8,'MOUTH REGION','color','r'); % initialize flags

FlagForHead=0; FlagEyes=0; FlagNose=0; FlagMouth=0;

cnt=0;

% initialize vision toolbox

shape=vision.ShapeInserter('BorderColor','Custom','CustomBorderColor',[255 255 0]); EyeDetector1=vision.CascadeObjectDetector('EyePairSmall'); NoseDetector=vision.CascadeObjectDetector('Nose'); MouthDetector1=vision.CascadeObjectDetector('Mouth');

 %%press any key while you are ready

for i=1:5 % for 200 frames, increse/decrese if required I2=getsnapshot(vobj); pause(0.5) FirstSeg=imcrop(I2,[C1 0 C2-C1 R1]); % figure(2),subplt(1,2,1);imshow(FirstSeg);

    BlackDetect=(FirstSeg(:,:,1)<70)&(FirstSeg(:,:,2)<70)&(FirstSeg(:,:,3)<70);
    BW1=imfill(BlackDetect,'holes');
    BW2=bwareaopen(BW1,2000);
    %subplot(1,2,2),imshow(BW2);
    [Matl Nr]=bwlabel(BW2);
    if Nr~=0
        FlagForHead=1;
    else
        FlagForHead=0;
    end
    SecondSegment=imcrop(I2,[C1 R1 C2-C1 R2-R1]);
    figure(3),subplot(1,2,1),imshow(SecondSegment);
    bbox_eye1=step(EyeDetector1,SecondSegment);
    I_Eye=step(shape,SecondSegment,int32(bbox_eye1));
    if isempty(bbox_eye1)~=1
        FlagEyes=1;
        EyeRegion=imcrop(SecondSegment,[bbox_eye1(1,1),bbox_eye1(1,2),bbox_eye1(1,3),bbox_eye1(1,4)]);
        subplot(2,1,1),imshow(I_Eye),title('EYE INPUT');
        subplot(2,1,2),imshow(EyeRegion),title('EYE REGION');
    else
        FlagEyes=0;
    end;
    ThirdSegment=imcrop(I2,[C1 R2 C2-C1 R3-R2]);
   % figure(4),subplot(1,2,1),imshow(ThirdSegment);
    bbox_Nose1=step(NoseDetector,ThirdSegment);
    I_Nose=step(shape,ThirdSegment,int32(bbox_Nose1));
    if isempty(bbox_Nose1)~=1
        FlagNose=1;
        %
        NoseRegion=imcrop(ThirdSegment,[bbox_Nose1(1,1),bbox_Nose1(1,2),bbox_Nose1(1,3),bbox_Nose1(1,4)]);
        %subplot(3,2,5),imshow(I_Nose),title('Nose INPUT');
        %subplot(1,2,2),imshow(NoseRegion),title('Nose REGION');
    else
        FlagNose=0;
    end;
    FourthSegment=imcrop(I2,[C1 R3 C2-C1 R4-R3]);
    %figure(5),subplot(1,2,1),imshow(FourthSegment);
    bbox_Mouth1=step(MouthDetector1,FourthSegment);
    I_Mouth=step(shape,FourthSegment,int32(bbox_Mouth1));
    if isempty(bbox_Mouth1)~=1
        FlagMouth=1;
        %
        MouthRegion=imcrop(FourthSegment,[bbox_Mouth1(1,1),bbox_Mouth1(1,2),bbox_Mouth1(1,3),bbox_Mouth1(1,4)]);
       % subplot(3,2,3),imshow(I_Mouth),title('MOUTH INPUT');
       % subplot(1,2,2),imshow(MouthRegion),title('MOUTH REGION');
    else
        FlagMouth=0;
    end;
    if ((FlagForHead==1)&&(FlagEyes==1)&&(FlagMouth==1))
        disp('Normal Condition')
        cnt=0;
    else
        disp('possible drowsiness detection')
        cnt=cnt+1;
    end
    if cnt>3
        cnt=0;
        disp('drowsiness confirmed')
       load gong.mat;
sound(y); 
pause(5);
    end
end

[Walter Roberson]

Viola Jones