How to extend line until end of image

Lets say, i have a line and i want to extend the line until the end of the image. The line is displayed in the first photo with the green is my basic line, i want to extend it like the second image, until the end of the image. I want to do this for all the lines that i have detected. Does anyone knows how to do this?

• I think i found it May 28 '19 at 14:52

i think i found it

X= [x1, x2]
Y=[y1, y2]

c = [[1; 1]  X(:)]\Y(:);
slope_m = c(2)
intercept_b = c(1)

aLine = [slope_m,-1,intercept_b];
points = lineToBorderPoints(aLine,size(negfillHoles))
line(points([1 ,3]),points([2 ,4]),'LineWidth',1.5,'Color','r');
plot(x1,y1,'*','LineWidth',2,'Color','g');


I would suggest this approach: