Interpolation method of IMAGE

When the size of the data displayed by the image command differs from the number of pixels used on the screen, the data must be interpolated.

• Which method is used for this interpolation?
• A user-defined property to control this would be fine.
• If I want to create a user-defined interpolation, it would be convenient to let it be triggered automatically, when the image is resized - e.g. be resizing the figure or modifying the axes positions. What is a secure way to catch all methods of resizing? Can we attach a callback? Maybe in the Java level? (Hi Yair!)

Answer 1

[Jan]

x = zeros(640, 480, 3);
x(:, 1:2:end, :) = 1;
image(x)

This looks confusing to me in the online version: Where are the steps on the diagonal come from? They appear in a 64x48 pixels image also.

Locally in a figure of Matlab R2018b it looks, like image() is using a "nearest neighbor" interpolation:

All pixels are black or white.

[Andreas Westlund]

Did you succeed in creating your own resize function? And would you mind sharing a code example?

Answer 2

[yanqi liu]

yes,sir，may be default display size confused，such as

clc; clear all; close all;
x = zeros(640, 480, 3);
x(:, 1:2:end, :) = 1;
figure;
h=image(x);truesize