size differ when processing
显示 更早的评论
In my code below can u tell why the number of elements are different or size is different
>> img=imread('peppers.png');
>> flatImg = double(reshape(img,size(img,1)*size(img,2),size(img,3)));
idx = kmeans(flatImg,3)
size(flatImg)
196608 3
size(idx)
196608 1
please provide assistance
采纳的回答
Image Analyst
2012-8-31
0 个投票
You have 196608 pixels. In flatImg you rearranged them into rows where each column is the red, green, and blue values.
With kmeans, each of the 196608 pixels is classified as a "1", "2", or a "3" depending on its color, so it's a 1D array. There is no information along any second dimension like there was with flatImg.
There is no reason why they should be the same size because they represent different things. Do you think they should?
3 个评论
kash
2012-8-31
Image Analyst
2012-8-31
编辑：Image Analyst
2012-8-31
What second and third dimension? You have a list of classifications for each pixel. For example, pixel 1 might be class 3 and pixel 2 might be class 2, etc. You have to reshape that "idx" into a 2D image (the same size as your original image) if you want the classified image. It will have the same number of gray levels as classes you have, obviously.
kash
2012-9-1
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Blocked Images 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
