Comparing RGB pixel values of two .tiff images

1 次查看（过去 30 天）
Vespi
Vespi 2016-3-3
评论： Vespi 2016-3-4
I have two TIFF files that represent a region but for two separate years. The TIFF files were downloaded as 1 band, but I converted then to RGB (3 band) via ArcGIS. I have extracted the RGB channels using the code below for both images:
R1=im1(:,:,1);
G1=im1(:,:,2);
B1=im1(:,:,3);
So now that I have 3 matrices for each image I want to compare the RGB values between the two images (two years). What would be the most efficient way to compare RGB values by pixel between these two images?

请先登录，再回答此问题。

回答（2 个）

Walter Roberson
Walter Roberson 2016-3-3
isequal()
  1 个评论
Vespi
Vespi 2016-3-4
Thank you Mr. Roberson. I failed to mention that I would like to extract the pixel numbers where the images are different to obtain the rgb values within those pixels. I have a separate file that identifies the type of land use based on RGB code. Could I save these rgb values where there are differences detected in excel?

请先登录，再进行评论。

Image Analyst
Image Analyst 2016-3-3
What does "compare" mean to you? Find the difference? See if they're equal?
diffImage = double(R1) - double(R2);
subplot(1,2,1);
imshow(diffImage, []);
subplot(1,2,2);
notEqual = R1 ~= R2;
imshow(notEqual);
  1 个评论
Vespi
Vespi 2016-3-4
By compare I mean find the differences between the two images. I would like to extract the pixel numbers where the images are different to obtain the rgb values within those pixels. I have a separate file that identifies the type of land use based on RGB code. Could I save these rgb values where there are differences detected in excel?

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Modify Image Colors 的更多信息

标签

产品

Community Treasure Hunt

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

Start Hunting!

Translated by