Insert PNG image into normal image
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Normally, there is no problem, if we load two images in jpg formats, and insert one image to another as logo. But due to background and boarders, we need to insert png image. the output is attached
** how to handle png images.
As we know that png images have no backgroud, but once they are loaded in matlab, background turns into black. how to handle the background.
consider following image,
img1 = imread('1.jpg');
logo = imread('logo.png');
img1(1:size(logo,1), 1:size(logo,2), :) = logo;
imshow(img1)
5 个评论
Guillaume
2019-9-18
"Normally, there is no problem, if we load two images in jpg formats,... But ... we need to insert png image."
The original format of the image does not matter at all for whatever it is you're doing in matlab. Whatever format it was, you get pixel intensities in matlab.
Now, it may be that your original code assumed that the images were RGB images of a certain class (probably uint8 MxNx3) and that you're now getting images of a different type (greyscale or indexed) or different class (uint16?) but that is unrelated to the storage format.
So, we need more detail about the actual images once loaded in matlab (size and class).
Rik
2019-9-18
The problem is still the same, as is the solution. If you want more explicit help, please attach the logo and image to your question.
Guillaume
2019-9-18
@rik, totally unrelated to the question at hand, how did you write your comment above? It has a smaller font than unusual, how did you achieve that? (It would help with diagnosing a current bug where some posts can't be edited).
Guillaume
2019-9-18
@king umar, is your question about compositing two images with one having associated transparency info (i.e alpha blending)?
回答（1 个）
Rik
2019-9-18
0 个投票
If you want to prevent overwriting the underlying image for some pixels, you can use a logical mask to only overwrite some pixels.
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