Prev: soundsc or sound function will not play audio
Next: approximation
From: Ritika on 5 Jun 2010 23:26
How can we extract the RGB triplet for an jpg image?
From: ImageAnalyst on 5 Jun 2010 23:57
On Jun 5, 11:26 pm, "Ritika " <ritika.dhi...(a)gmail.com> wrote:
> How can we extract the RGB triplet for an jpg image?

------------------------
rgbImageArray = imread(fullFileName);
x=100; % Whatever x (column) you want.
y = 250; % Whatever y (row or line number) you want.
redValue = rgbImageArray(y, x, 1);
greenValue = rgbImageArray(y, x, 2);
blueValue = rgbImageArray(y, x, 3);

% If you want it all in one array:
rgbTriplet = [redValue greenValue blueValue];

From: Walter Roberson on 6 Jun 2010 01:00
ImageAnalyst wrote:
> On Jun 5, 11:26 pm, "Ritika " <ritika.dhi...(a)gmail.com> wrote:
>> How can we extract the RGB triplet for an jpg image?
>
> ------------------------
> rgbImageArray = imread(fullFileName);
> x=100; % Whatever x (column) you want.
> y = 250; % Whatever y (row or line number) you want.
> redValue = rgbImageArray(y, x, 1);
> greenValue = rgbImageArray(y, x, 2);
> blueValue = rgbImageArray(y, x, 3);
>
> % If you want it all in one array:
> rgbTriplet = [redValue greenValue blueValue];

Note that if the image is an indexed (pseudocolor) image then you will
need to convert it to rgb before extracting the color planes, with ind2rgb()
 | 
Pages: 1
Prev: soundsc or sound function will not play audio
Next: approximation