How to find active contours of multiple images simultaneously and how to overlay multiple of them?

I have tried various codes for active contour using ROI but it works for one image at a time and overlay using cast outpict function it decreases brightness of other boundary.

Answer 1

[Constantino Carlos Reyes-Aldasoro]

Post what you have done so that it is possible to help.

[Charu]

i have applied this code to find active contour of an image and get this image. i want to get several of them together.

A = imread('Charu 5.jpg');

imshow(A)

I = rgb2gray(A);

figure

imshow(I)

r = drawrectangle;

mask = createMask(r);

bw = activecontour(I,mask,1,'edge');

hold on;

visboundaries(bw,'Color','r');

[Charu]

Also, for overlaying multiple images, i used this code. but it decreases brightness of upper image on successive overlaying.

A = imread('A0.jpg');

B = imread('A1.jpg');

C = imread('A2.jpg');

D = imread('A3.jpg');

E = imread('A4.jpg');

F = imread('A5.jpg');

G = imread('A6.jpg');

outpict = cat(7,A,B,C,D,E,F,G);

outpict = cast(mean(outpict,7),class(A));

imshow(outpict);