How Can I do image extraction of chosen region?

3 次查看（过去 30 天）

Ali Zulfikaroglu 2020-12-28

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/704122-how-can-i-do-image-extraction-of-chosen-region

评论： Ali Zulfikaroglu 2021-1-6

I have an mammogram image . I use roipoly command to draw tumor suspicious area . Maybe something easier ways to draw that blue polygon.

My question is I need to extract that blue polygon tumor suspicious region from original image and then I will segment that extracted image.

How Can I do that ?

(The image was taken from mias database).

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。

采纳的回答

Image Analyst 2020-12-29

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/704122-how-can-i-do-image-extraction-of-chosen-region#answer_586863

在 MATLAB Online 中打开

Once you have the mask, do this:

% Mask the image using bsxfun() function to multiply the mask by each channel individually.  
% Works for gray scale as well as RGB Color images.
maskedImage = bsxfun(@times, rgbImage, cast(mask, 'like', rgbImage));

changing the names to whatever you want to call them.

12 个评论
显示 10更早的评论隐藏 10更早的评论

Image Analyst 2021-1-5

在 MATLAB Online 中打开

I already told you:

mask = false(rows, columns);
drawAnother = true;
while drawAnother
    thisMask = roipoly(); % or however you want to get it.
    mask = mask | thisMask;
    % ask user if they want to draw another with questdlg().
    promptMessage = sprintf('Do you want to Continue processing,\nor Quit processing?');
    titleBarCaption = 'Continue?';
    buttonText = questdlg(promptMessage, titleBarCaption, 'Continue', 'Quit', 'Continue');
    if contains(buttonText, 'Quit', 'IgnoreCase', true)
    	drawAnother = false;
    end
end