create a loop to determine the pixel distance from the center using the distance formula

using the distance formula I need to find the the pixel distance from the center of my image 'sunflower.jpg'. I have found the center of my image im just cofused on how to write the loop and what values my x and y would be.

d^2 = (x-x_c)^2 + (y-y_c)^2 (distance formula)

Answer 1

[Setsuna Yuuki.]

you just have to move (x, y).

(x_c, y_x) are fixed.

image = imread('sunflower,jpg');
[l,h,~] = size(image);
%(x_c,y_c) = center of image
for x=1:l
    for y=1:h
        d = sqrt((x-x_c)^2+(y-y_c)^2);
    end
end

[Yogesh Bhambhwani]

thanks

[Yogesh Bhambhwani]

Im trying to take the values that I got from the loop and divide them by the max how would I do that everytime i try to take the values for d its only giving me the max and not the other values how can I create an array of the d values so that i can divide them.

[Setsuna Yuuki.]

i = 1;
for x=1:l
    for y=1:h
        d(i) = sqrt((x-x_c)^2+(y-y_c)^2);
        i=i+1;
    end
end

final = d/max(d);

[Yogesh Bhambhwani]

Thanks you could you also help with another thing as well im trying to vingette my image using

VinColor = Color * (1-r^2) and I am having trouble multiplying them togther I know that they are diffeerent and I have googled other options to multiple them togther and Its still not working. Also r = final. Thanks again.

[Setsuna Yuuki.]

what is color ??

VinColor = Color * (1-r.^2) %maybe can be like that if r is a vector

[Yogesh Bhambhwani]

So I have been doing that and its not working (color is the original image) everytime I view the image it is just all black.