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From: PinkLab on 8 Apr 2010 04:05
I am trying to convert the color image into black and white without using the rgb2gray function.

i understand the grayscale image M pixels tall and N pixels wide is represented as a matrix of double datatype of size M×N and denote the pixel grayscale intensities in [0,1] with 0=black and 1=white

but not sure how to implement this after reading my image

I = imread('image.jpg');

please help
From: Oliver Woodford on 8 Apr 2010 05:34
"PinkLab " wrote:
> I am trying to convert the color image into black and white without using the rgb2gray function.
>
> i understand the grayscale image M pixels tall and N pixels wide is represented as a matrix of double datatype of size M×N and denote the pixel grayscale intensities in [0,1] with 0=black and 1=white
>
> but not sure how to implement this after reading my image
>
> I = imread('image.jpg');
>
> please help

function B = rgb2gray(A)
[h w c] = size(A);
if c ~= 3
error('RGB image expected');
end
if ~isfloat(A)
A = double(A) / 255;
end
B = reshape(reshape(A, h*w, c) * [0.299; 0.587; 0.114], h, w);
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