add scale bar to image
100 ビュー (過去 30 日間)
古いコメントを表示
How to add scale on the horizontal axis on an image (not on a graph). the image length density is 0.101mm/pixel. How can i just show the scale below the image.
0 件のコメント
採用された回答
David Goodmanson
2017 年 7 月 18 日
Hi Irfan,
A = imread('your_image.whatever');
sizh = size(A,2); % or any other way to find the number of pixels in the horizontal
% direction if you are not using imread.
xmax = sizh*.101;
image([0 xmax],[],A)
With the second, empty argument in image( ) you can do the same thing in the y direction. ,
2 件のコメント
その他の回答 (1 件)
Joshua Brockman
2017 年 9 月 25 日
I often use Matlabs quiver plot with the arrow head turned off to add a vector (which will appear as a bar) to your image.
The way I do this:
figure; imshow(YourImage) hold on
% Pixel Size = size of pixel within your image % Scalebar_length = Desired scale bar length % x_location and y_location are wherever you want your scale bar to appear. quiver(x_location,y_location,Scalebar_length/PixelSize,0,'ShowArrowHead','off')
1 件のコメント
Rob Campbell
2019 年 7 月 25 日
I tried this method and noticed when I labelled the bar by putting text where the center of the bar should be (with 'horizontalalignment' as 'center'), the text was always offset a bit. In figuring that out I found that the bar produced with quiver is a little longer than it ought to be. Better to use plot to do that.
参考
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!