Image Processing Doubt

[jeyapreetha]

Hai friends,
I have one doubt in Image downsampling. If we want to downsample an image by a factor 2, the alternative rows and columns will be taken. But if we want to downsample the image by a matrix(for example 2 cross 2 matrix), what should we do? Is similar to that of convolution? Plz clarify my doubt. Thanx in advance.

 

[flora]

hai Preetha,
I think both down sampling by taking alternate rows and colums is same as that of down sampling using matrix.

 

[jeyapreetha]

That is not my doubt. If we want to downsample an image by means of one matrix means, what should we do? Anything like matrix multiplication or convolution? Thank u for ur response and please try to solve my doubt.

 

[swt_kitten]

jayapreetha, can u plz contact me on rahilatr@gmail.com .... hope i am doing the same thing as urs ....