matlab meshgrid和griddata对图像进行平滑

通过 meshgrid和griddata对数据进行插值，可以使强度图变得更平滑，具体如下：

clc; clear; close all;

data1 = randn(6);

figure(1);
subplot(231);
hm = heatmap(data1);
hm.CellLabelColor = 'none';
grid off;
colormap(hm, 'jet');

subplot(232);
x = 1:6;    y = 1:6;    z = data1;
[X, Y] = meshgrid(linspace(1, 6, 20), linspace(1, 6), 20);      % 插值效果1
Z = griddata(x, y, z, X, Y, 'v4');
hm = heatmap(Z);
hm.CellLabelColor = 'none';
grid off;
colormap(hm, 'jet');

subplot(233);
x = 1:6;    y = 1:6;    z = data1;
[X, Y] = meshgrid(linspace(1, 6, 200), linspace(1, 6), 200);    % 插值效果2
Z = griddata(x, y, z, X, Y, 'v4');
hm = heatmap(Z);
hm.CellLabelColor = 'none';
grid off;
colormap(hm, 'jet');