Saving a resized image while keeping the resized values

Hi! I want to save a resized image in .png format. The .png image I start from has size 656x875 pixels.

I used this code to resize the image so that it is 500x500 pixels and the code works.

imageArray = imread('figure_001.png');
figure();
axis equal
imshow(imageArray);

image8bit = rgb2gray(imageArray);
imagelogical = logical(image8bit);
figure();
axis equal
imshow(imagelogical);

resize_image = imresize(imagelogical, [500 500]);
name_figure = figure; 
axis equal
imshow(resize_image);

The problem occurs when I save the resized image. I am using this code:

output = sprintf('figure.png');
fulldestination = fullfile(pwd, output);
saveas(name_figure, fulldestination)

however when I view the properties of the figure I get a size of 766x855 pixels. How come?

Answer 1

[Matt J]

Because with saveas, you are saving a screenshot of the figure window, not an image composed from the pixel values of resize_image itself. Use imwrite instead,

imwrite(resize_image,fulldestination)