How to extract nearest pixel value [roi] by selection of reference pixel on a image?

조회 수: 2 (최근 30일)
Selva Karna
Selva Karna 2017년 8월 2일
댓글: Binu 2017년 8월 3일
How to extract nearest pixel value [roi] by selection of reference pixel on a image?

답변 (1개)

Swarooph
Swarooph 2017년 8월 2일
Use the impoint function.
Example:
img = imread('peppers.png');
figure;imshow(img)
h = impoint(gca,[]);
position = wait(h); %Double click on a pixel in the figure window
pixelLoc = round(position) %Get nearest pixel location
img(pixelLoc(2),pixelLoc(1),1:3) %Use pixel location to index into RGB image
Result:
pixelVal =
(:,:,1) =
158
(:,:,2) =
50
(:,:,3) =
56
  댓글 수: 2
Selva Karna
Selva Karna 2017년 8월 3일
Hi Swarooph , thanks for answer , actually my question is extract nearest pixel [ROI] its means region so , how to extract region by selection of pixel value?
Binu
Binu 2017년 8월 3일
Swarooph's answer gives you both the pixel position(x,y) and pixel value. If you are looking for a ROI and not just a pixel, try imrect or imellipse. They both use the imroi class and functions are similar to impoint.

댓글을 달려면 로그인하십시오.

카테고리

Help CenterFile Exchange에서 Read, Write, and Modify Image에 대해 자세히 알아보기

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by