Decompose image into the sum of two images

Question

Jenalyn Palacios 2020-3-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/513174-decompose-image-into-the-sum-of-two-images

评论： Jenalyn Palacios 2020-3-26

I have a black image with different sized white squares all over the image. If we let A denote this image, "decompose" A as the sum of two images A=A1+A2, such that A1 contains the larger sqares and A2 contains the smaller squares. Your code should display seperately A1 and A2.

This is my code so far. but i know its completely wrong. Can someone please help me with this!!

A=imread('small-squares.tif');
se = strel('square',7);
eroded = imerode(A,se);
figure
subplot (1,2,1), imshow(A), title('original')
subplot (1,2,2), imshow(eroded)

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2020-3-26

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/513174-decompose-image-into-the-sum-of-two-images#answer_422170

在 MATLAB Online 中打开

Hint: you need to segment the image (perhaps by thresholding),

allSquares = grayImage > 0;

or from imbinarize(). Then use regionprops to find out the size of all the squares and what threshold you want to use to distinguish small squares from big ones.

props = regionprops(.......

Then use bwareafilt() to create masks for smallSquareMask and bigSquareMask.

smallSquareMask = bwareafilt(............
bigSquareMask = bwareafilt(............

Then mask the gray image twice

% Mask the image using bsxfun() function to multiply the mask by each channel individually.
maskedRgbImage = bsxfun(@times, rgbImage, cast(mask, 'like', rgbImage));

to get two masked grayscale images or RGB images. When you add those two together you'll get the original image.