Displaying a value on a image using Imagesc

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Gova ReDDy
Gova ReDDy 2014-3-11
评论： Image Analyst 2014-3-13
Hello,
Can someone explain how to print a value on the image(required image).I tried this but the image was flipped and displayed
plot(5,6,'*r');test=imread('Capture.JPG');hold on;imagesc([.001 .001], [.001 0.001], test)
I also don't understand this scaling [.001 .001], [.001 0.001]
can someone explain of how to use the imagesc to print a value on the(or inside the) image .

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采纳的回答

Image Analyst
Image Analyst 2014-3-13
Just use the text() function
caption = sprintf('At (row %d, column %d), the value = %.3f', row, column, yourValue);
text(column, row, caption, 'FontSize', 30, 'Color', [.7, .4, .1]);
  2 个评论
Gova ReDDy
Gova ReDDy 2014-3-13
thanks it works but, can I know how to reduce the image size as the image attached is covering most of the iamge.I want to reduce the size of my image so that it sits in a small of the figure I plot
i=imread('Capture.JPG');
figure;imagesc(10,10,i);
axis([0 400 0 400]);
caption = sprintf('HBR value = %.3f',60);
text(150,150, caption, 'FontSize', 10, 'Color', [.7, .4, .1]);
can I know how to reduce the image size.

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更多回答（1 个）

Walter Roberson
Walter Roberson 2014-3-11
compare "axis xy" to "axis ij"
  1 个评论
Gova ReDDy
Gova ReDDy 2014-3-13
Can I get an example to use this imagesc. As I want to print a value of some value here HBR in the middle of the image
box_title = 'HeartRate';
box = uicontrol('Style', 'text','Units', 'norm', 'Position', [0.8 0.8 0.1 0.05]);
set(box,'string', sprintf('%s %f', box_title,HBR));
can I get some example to print a value inside(or middel of the) image.
thanks.

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