setting image position centered

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image-pro
image-pro 2022-5-5
评论： image-pro 2022-5-8
I have an image in the figure as shown above.
I want to display region of interest (white portion) at the center of the figure window (align centered position-registration). How can I do it?
Please explain. Thank you.

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Image Analyst
Image Analyst 2022-5-7
编辑：Image Analyst 2022-5-7
Try using regionprops to get the centroid, then imtranslate to shift it to the center of the image:
rgbImage = imread('image.png');
subplot(2, 1, 1);
imshow(rgbImage)
axis('on', 'image')
% Get binary image from the RGB image the poster attached.
binaryImage = rgbImage(:, :, 1) > 128;
% Find centroid.
props = regionprops(binaryImage, 'Centroid')
% Translate the image.
xt = props.Centroid(1)
yt = props.Centroid(2)
% Get center of image
[rows, columns, numberOfColorChannels] = size(binaryImage)
xc = columns/2;
yc = rows/2;
deltax = xc - xt
deltay = yc - yt
hold on;
plot(xt, yt, 'r+', 'LineWidth', 2, 'MarkerSize', 60);
centeredImage = imtranslate(rgbImage,[deltax deltay],'FillValues', 0);
subplot(2, 1, 2);
imshow(centeredImage)
axis('on', 'image')
% Draw center lines.
xline(xc, 'LineWidth', 2, 'Color', 'r');
yline(yc, 'LineWidth', 2, 'Color', 'r');
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Image Analyst
Image Analyst 2022-5-8
Loooks like you have a huge white frame around your blobs. Why? It also looks like your image has a black caption atop the image. Why? Are these screenshots of an entire figure rather than a binary image you got from a photo?
image-pro
image-pro 2022-5-8
Thanks a lot Image Analyst you solved my problem. Thanks

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