Zoom in on two images simultaneously displayed using imshowpair

Question

BC 2021-2-9

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https://ww2.mathworks.cn/matlabcentral/answers/740557-zoom-in-on-two-images-simultaneously-displayed-using-imshowpair

评论： Adam Danz 2022-12-21

采纳的回答： Adam Danz

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I have two images of the same dimensions. I'm using the code below to display them side by side.

imshowpair(imageA, imageB, "montage")

Currently if I zoom into an area of imageA in the figure ouput, it zooms solely into this area, treating the two images as one image. I want to be able to zoom into an area in imageA, and for the display to also zoom into the corresponding area of imageB at the same time, so I can compare the same areas of both images when zooming in.

Can I do this using imshowpair, the tools in the figure output, or some other way?

Thanks for the help!

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KALYAN ACHARJYA 2021-2-9

You can display images in two figures windows and compare two

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Answer 1

Adam Danz 2021-2-9

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https://ww2.mathworks.cn/matlabcentral/answers/740557-zoom-in-on-two-images-simultaneously-displayed-using-imshowpair#answer_619102

编辑：Adam Danz 2021-2-9

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> If I zoom into an area of imageA in the figure ouput, it zooms solely into this area, treating the two images as one image

That's because the two images are merged into one image on the same axes.

To achieve a dual display with independent axis tools, you need to plot the images in different axes. Then use linkaxes to yoke the axis limits when zooming/panning.

% Read in demo image
img = imread('cameraman.tif');
fig = figure(); 
ax(1) = axes('Units','normalized','Position', [ .1 .1 .4 .8]);
ax(2) = axes('Units','normalized','Position', [ .5 .1 .4 .8]);
imshow(img, 'Parent', ax(1))
imshow(img, 'Parent', ax(2))
linkaxes(ax)

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Siddharth Pantoji 2022-12-21

编辑：Siddharth Pantoji 2022-12-21

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Hi Adam,

I cant seem to get my annotations (red lines) to appear on both the images. Any suggestions?

Hold didnt work either

fig = figure();
ax(1) = axes('Units','normalized','Position', [ .1 .1 .4 .8]);
ax(2) = axes('Units','normalized','Position', [ .5 .1 .4 .8]);
imshow(ReferenceImage2, 'Parent', ax(1))
line([0 2464],[MW_lowerlimit-1 MW_lowerlimit-1],get(gca,'Ylim'),'Color',[1 0 0],'linewidth',0.5);
line([0 2464], [MW_upperlimit+1 MW_upperlimit+1],get(gca,'Ylim'),'Color',[1 0 0],'linewidth',0.5);
line([MW_leftlimit-1 MW_leftlimit-1],[0 2056],get(gca,'Ylim'),'Color',[1 0 0],'linewidth',0.5);
line([MW_rightlimit+1 MW_rightlimit+1],[0 2056],get(gca,'Ylim'),'Color',[1 0 0],'linewidth',0.5);
line([CenterLinePosition CenterLinePosition],[0 2056],get(gca,'Ylim'),'Color',[1 0 0],'linewidth',0.5,'LineStyle','--');
imshow(ReferenceImage1, 'Parent', ax(2))
line([0 2464],[MW_lowerlimit-1 MW_lowerlimit-1],get(gca,'Ylim'),'Color',[1 0 0],'linewidth',0.5);
line([0 2464], [MW_upperlimit+1 MW_upperlimit+1],get(gca,'Ylim'),'Color',[1 0 0],'linewidth',0.5);
line([MW_leftlimit-1 MW_leftlimit-1],[0 2056],get(gca,'Ylim'),'Color',[1 0 0],'linewidth',0.5);
line([MW_rightlimit+1 MW_rightlimit+1],[0 2056],get(gca,'Ylim'),'Color',[1 0 0],'linewidth',0.5);
line([CenterLinePosition CenterLinePosition],[0 2056],get(gca,'Ylim'),'Color',[1 0 0],'linewidth',0.5,'LineStyle','--');
linkaxes(ax)