Methods and apparatus for image convolution

An integrated circuit for performing a two dimensional convolution operation comprising:

• a first logic circuit being configured to receive input data and respective coefficients and perform a one-dimension convolution operation thereon;
• a buffering circuit for the purpose of buffering the output of the first logic circuit for a first convolution of an image;
• and,
• a second logic circuit for selection between data on which convolution in a first dimension is to be performed and data from the buffering circuit on which convolution in a first dimension has been performed.

A method of performing a two dimensional convolution operation comprising:

• performing a first dimension convolution operation followed by a second dimension convolution operation by:
• receiving a square pixel matrix of an odd number of lines;
• receiving first coefficients respective of said first dimension;
• performing a one-dimension convolution operation in said first dimension using said pixel matrix and said first coefficients;
• storing the results of the convolution of said first dimension in a buffer;
• receiving second coefficients respective of said second dimension;
• and,
• repeating said one-dimension convolution operation in said second dimension using said results stored in said buffer and said second coefficients.