4.1.3.1. IIR vs. RLE Gaussian Blurs

• GIMP supports two implementations of Gaussian Blur: IIR G.B. and RLE G.B.
• They both produce the same results, but each one can be faster in some cases.

RLE Gaussian Blur

• RLE stands for run-length encoding
• RLE Gaussian Blur is best used on computer-generated images or those with large areas of constant intensity.

IIR Gaussian Blur

• IIR stands for "Infinite Impulse Response".
• This blur works best for large radius values and for images which are not computer generated.