How to smoothen the edges from an image obtained from imagesc function

Question

I have an RGB image obtained from saving the imagesc function as shown below. how to refine/smoothen the edges present in the image.

It consists of sharper edges, where I need to smoothen them. Im not able to find a solution for performing this for an RGB image. Instead of the staircase effect seen in the image I'd like to even out the edges. Please help thanks in advance.

Answer 1

maybe imresize will help you:

% here im just generating an image similar to yours
A = zeros(20);
for ii = -2:2
    A = A + (ii + 3)*diag(ones(20-abs(ii),1),ii);
end
A([1:5 16:20],:) = 0;A(:,[1:5 16:20]) = 0;
subplot(121);
imagesc(A);
title('original')
% resizing image with bi-linear interpolation
B = imresize(A,100,'bilinear');
subplot(122);
imagesc(B);
title('resized')

EDIT

here I do resize + filtering + rounding:

% generates image
A = zeros(20);
for ii = -2:2
    A = A + (ii + 3)*diag(ones(20-abs(ii),1),ii);
end
A([1:5 16:20],:) = 0;A(:,[1:5 16:20]) = 0;
subplot(121);
imagesc(A);
title('original')
% resizing
B = imresize(A,20,'nearest');
% filtering & rounding
C = ceil(imgaussfilt(B,8));
subplot(122);
imagesc(C);
title('resized')