Converting the grayscale dimension in a 4D dicom image matrix to RGB
조회 수: 6 (최근 30일)
이전 댓글 표시
I converted a mha file to dicom format (and got this file: https://www.dropbox.com/s/i0cr2910ie4k5zy/TumorSimOutput2_T1.dcm ) via a Linux utility program (this one: http://manpages.ubuntu.com/manpages/lucid/man1/gdcm2vtk.1.html ) and visualize it via imshow using threedimensional indexing:
imshow(image_data(:,:,index),'DisplayRange',[]);
when I examine the dimensions of image_data I get:
256 256 1 181
I understand the third dimension is the grayscale intensity (thanks to Walter Roberson and his answer here: http://www.mathworks.com/matlabcentral/answers/62671-4d-dicom-matrix-why-not-3d).
I want to convert this grayscale dimension of the matrix into RGB, how can I do this?
댓글 수: 0
채택된 답변
Image Analyst
2013년 2월 8일
How about extracting the gray scale image from the 4D image, and then converting it:
grayImage = your4Dimage(:,:,1,181); % Can use any frame instead of 181
rgbImage = cat(3, grayImage, grayImage, grayImage);
댓글 수: 3
Image Analyst
2013년 2월 15일
You don't use [] with an RGB image, only grayscale. But for RGB images, the values have to be between 0 and 1 if the image is floating point, and between 0 and 255 if it's uint8. I suggest you capture that slice into a single 2D image (like Walter suggested) so that you can do "whos" on it to see what class and dimensions it really has, before you just blindly toss it into imshow() and hope for the best. So, now, is your image gray scale, or color, and is it double or uint8?
rgb4Dimage = your4Dimage(:,:,[1 1 1],:);
whos rgb4Dimage
size(rgb4Dimage)
what does all that show?
추가 답변 (0개)
참고 항목
카테고리
Help Center 및 File Exchange에서 Convert Image Type에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!