如何添加"colorbar"并将"clim"设置为覆盖在灰度图像上的彩色图像? [英] How to add a 'colorbar' and set 'clim' to a colour image overlaid on a grey level image?

问题描述

我正在尝试将彩色图像叠加在灰度图像上.但是，当我尝试绘制'colorbar'并将其设置为'clim'时. Matlab总是根据下面的灰度图像生成一个色条.

I am trying to overlay a colour image on a grey level image. However, when I try to plot the 'colorbar' and set the 'clim'. Matlab always produce a colorbar according to the underneath grey level image.

但是，我想获取覆盖彩色图像的颜色栏.任何建议，将不胜感激.非常感谢.

However, I want to get the colorbar for the overlaid colour image. Any suggestions would be appreciate. Thanks a lot.

%% Example codes:
  greyImage = imread('AT3_1m4_08.tif');
  colorImage = imread('hestain.png');

  figure,

  greyImagePlot = image(greyImage); colormap(gray); hold on;

  overlayImage = imagesc(colorImage, ...
      'CDataMapping', 'scaled', 'HitTest', 'off');
  alF = 0.5.*ones(size(colorImage, 1), size(colorImage, 2));
  set(overlayImage, 'AlphaData', alF);
  colorbar; % This will show a grey scale colorbar not the colour one I want
  set('CLim', [0 100]); % Also, the colormap limit here is not working

  axis off          
  axis image        

推荐答案

单个图形/多个颜色图的参考可以在这里找到 http://www.mathworks.fr/support/solutions /en/data/1-GNRWEH/index.html

A reference for single figure/multiple colormaps can be found here http://www.mathworks.fr/support/solutions/en/data/1-GNRWEH/index.html

尤其是使用图像时，可以使用子图像"功能.

Using images in particular, one can use 'subimage' function.

当自制解决方案过于棘手时，我还会使用"matlabcentral"中的"FreezeColor"和"cbfreeze"功能. http://www.mathworks.com/matlabcentral/fileexchange/7943-freezecolors-unfreezecolors http://www.mathworks.com/matlabcentral/fileexchange/24371

I also use 'FreezeColor' and 'cbfreeze' functions from 'matlabcentral' when a home-made solution is too tricky. http://www.mathworks.com/matlabcentral/fileexchange/7943-freezecolors-unfreezecolors http://www.mathworks.com/matlabcentral/fileexchange/24371

一种简单而又懒惰的解决方案，用于在同一坐标轴上的多个图上保留颜色条:首先绘制彩色图像及其颜色条，冻结颜色条，然后在灰度图像上绘制(无透明度)，最后绘制再次彩色图像(透明).

A straightforward - and lazy - solution for keeping a colorbar across multiple plots within the same axes: first plot the colour image and its colorbar, freeze the colorbar, then plot over the grey level image (no transparency), and finally plot the colour image again (transparency).

这是一段代码.

figure;

%first step: RGB image and colorbar
overlayImage = imagesc(colorImage, 'CDataMapping', 'scaled', 'HitTest', 'off');
alF = 0.5.*ones(size(colorImage, 1), size(colorImage, 2));
set(overlayImage, 'AlphaData', alF);
colorbar; 
set(gca, 'CLim', [0 100]); 

cbfreeze; %from 'COLORMAP and COLORBAR utilities' in Matlab Central

%second step: gray image (no transparency)
greyImagePlot = image(greyImage); colormap(gray); hold on;

%third step: plot colour image
overlayImage = imagesc(colorImage, ...
  'CDataMapping', 'scaled', 'HitTest', 'off');
alF = 0.5.*ones(size(colorImage, 1), size(colorImage, 2));
set(overlayImage, 'AlphaData', alF);

axis off          
axis image   

这篇关于如何添加"colorbar"并将"clim"设置为覆盖在灰度图像上的彩色图像?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！