how to transfer image pixel values into array
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transfer image pixel values into array for complete image
- array(,1)=R value
- array(,2)=G value
- array(,3)=B value
- array(,4)=x position
- array(,5)= y position
1 个评论
David Young
2014-2-20
The question does not make sense. array(,1) is not valid syntax - there needs to be something in front of the comma. Also, what are you transferring the values from?
采纳的回答
Image Analyst
2014-2-20
编辑：Image Analyst
2014-2-20
Try this:
for k = 1 : length(RValues)
array(k, 1) = RValues(k);
array(k, 2) = GValues(k);
array(k, 3) = BValues(k);
array(k, 4) = XValues(k);
array(k, 5) = YValues(k);
end
OR
% For a complete image
k = 1;
[rows, columns, numberOfColorChannels) = size(rgbImage);
if numberOfColorChannels == 3
for col = 1 : columns
for row = 1 : rows
array(k, 1) = rgbImage(row, col, 1);
array(k, 2) = rgbImage(row, col, 2);
array(k, 3) = rgbImage(row, col, 3);
array(k, 4) = col;
array(k, 5) = row;
k = k + 1;
end
end
end
I don't know why you'd ever want this unless maybe you were exporting to some kind of modeling/cadcae program.
2 个评论
Image Analyst
2014-2-20
sonam's "Answer" moved here, since it was not an answer.
1Start
2.img = input plain image.
3 rows, cols = size of img.
4 create array of (rows*cols , 5)
5 transfer img pixel values into array for complete image
array(,1)=R value
array(,2)=G value
array(,3)=B value
array(,4)=x position
array(,5)= y position
6 sort this array
7 img = form an image using this array
8 Invoke ImageEncryption(img, rows, cols)
9 End
Image Analyst
2014-2-20
I did 1-5 for you. To sort you just call the sort() function but I don't know what column you are sorting on. And 7 is unnecessary since you already have the image - you needed it to do steps 2-5. Only you know what you need to do for step 8.
更多回答（1 个）
Adam
2014-2-20
If you mean array(:,1) = R value, then:
if true
myImage = imread('myFile.img');
array(:,1) = reshape(myImage(:,:,1),[],1); %red
array(:,2) = reshape(myImage(:,:,2),[],1); %green
array(:,3) = reshape(myImage(:,:,3),[],1); %blue
[array(:,4),array(:,5)] = ind2sub(size(myImage(:,:,1)),1:numel(myImage(:,:,1)));
end
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