how to make input data from output superimpose

Question

Ahmed 2011-9-29

关闭： MATLAB Answer Bot 2021-8-20

how to make the output figure from superimpose technique to input data where can be used for further coding..

myImage=imread('B1.jpg');
S=im2bw(myImage,100);
imshow(myImage), hold on
himage = imshow(S);
set(himage, 'AlphaData', 0.5);

output from figure,i wanted to become as input for another coding.how to do that?

example:

gray=rgb2gray(*output from figure in superimpose technique*)

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Answer 1

Walter Roberson 2011-9-29

The only general method is getframe(), which usually does more work than is necessary.

If the two images are the same size, then you can calculate the resulting image using the Alpha Blending formulas.

Walter Roberson 2011-10-5

RecordedImage = getframe;

See http://www.mathworks.com/help/techdoc/ref/getframe.html

Ahmed 2011-12-3

i use RecordedImage = getframe; but it capture some of icon in the figure frame not just capture that current image i need.

I try use saveas(gcf,'trans.jpg', 'jpg') instead of RecordedImage= getframe;

But i face some problem where the dimension of saved image bigger than the original image.

How to maintain the dimension of original image when we use saveas(gcf,'trans.jpg', 'jpg').?

From that saved image, i can use the superimpose image as aa input data.

example

i=imread('trans.jpg');