MatLabscript lijndetectie
clear all
close all
clc
%%Loading in the video
videoPlayer = vision.VideoPlayer('Name','Original Image','Position', [100, 200, 400, 400]);
outputPlayer = vision.VideoPlayer('Name','Threshold','Position',[600,200, 400, 400]);
outputPlayer2 = vision.VideoPlayer('Name','Skeleton','Position',[1100,200, 400, 400]);
release(outputPlayer); release(videoPlayer);
nr=0;
videoReader = vision.VideoFileReader('topcamvideo.avi');
% outputPlayer = vision.outputPlayer
while isOpen(videoPlayer) || nr==0
frame = step(videoReader);
frame = rgb2gray(frame); %Converting to black and white (single matrix)
step(videoPlayer,frame)
videoPlayer.step(frame)
%%Threshold
% Filters the image, above a certain threshold will become 1 (white), below
% the threshold will become 0 (black).
bin_img=im2bw(frame, 0.3); %Creating a binary image [original, value]
bin_img=imopen(bin_img,strel('square',3)); % image opening
bin_img=imclose(bin_img,strel('square',5)); % image closing
outputPlayer.step(bin_img)
step(outputPlayer,bin_img)
%%Skeleton function (was not used, but could be useful)
% Filters the image, creates an medial axis (hartlijn) at every point of
% the blob. The middle pixels of the thick lines remain white.
skel_img=bwmorph(bin_img,'skel',15);
hor_skel_img=imopen(skel_img,strel('line',5,0)); %Filtering out horizontal lines [minlength,angle]
hor_skel_img=imclose(hor_skel_img,strel('disk',5));
ver_skel_img=imopen(skel_img,strel('line',5,90)); %Filtering out vertical lines [minlength,angle]
ver_skel_img=imclose(ver_skel_img,strel('disk',5));
skel_img=hor_skel_img+ver_skel_img; %Adding horizontal + vertical
% skel_img=imdilate(skel_img,strel('disk',9));
% skel_img=imerode(skel_img,strel('disk',5));
outputPlayer2.step(skel_img)
step(outputPlayer2,skel_img)
nr=nr+1;
end
videoPlayer.hide(); outputPlayer.hide(); outputPlayer2.hide();
close all;