User`s guide

7 Analysis and Enhancement

radians per sample. The coefficients were created using the Filter Design

and Analysis Tool (FDATool) and the

ftrans2 function.

11 Use the 2-D FIR Filter block to model a band-reject filter capable of

removing the periodic noise from the video. Set the block parameters as

follows:

• Coefficients =

• Output size = Same as input port I

• Padding options = Circular

Choose a type of padding that minimizes the effect of the pixels outside the

image on the processing of the image. In this example, circular padding

produces the best results because it is most effective at replicating the

sinusoidal noise outside the image.

7-44