[SOLVED] Image Processing - 2D downsampling

[swt_kitten]

hai,

I need to know how an image downsampled by a 2D matrix.
like d=[2,0;0,2]
I need to downsample an image which is in matrix form by this 'd'.
if the image is 512x512 how could i make this d to the size of image.

Please can any one help me

Thank you

 

[mythrikalam]

create a mask with your 'd'.....convolve the image with the mask,so that your image gets downsampled......

 

[swt_kitten]

thank you for ur reply..
but how will i make the mask? should it be in same size of the image??
can u show some simple example if u dnt mind..

 

[swt_kitten]

thank you mythrikalam.. i did the downsampling for an image..
but still i have some doubts regarding, how an image downsampled by a matrix... :???: