Wednesday, October 5, 2011

Reaction: Imaging Vector Fields Using Line Integral Convolution

The paper talks about imaging vector field technique that help to improve upon the texture of visualizations and produce high quality images. I did find the paper slightly more complicated than the previous two and mathematical but I agree that it is an interesting read.

The paper explains about how DDA convolution takes the vector field to be a straight line and how this adversely affects the texture and detail of the image in cases where the radius of curvature is small. To overcome this, the LIC (line integral convolution) technique is used to approximate vector fields starting from the center of a pixel.It was fascinating to read how noise is effectively reduced in the whole process to generate lower blur, good quality images. The process of normalization to maintain both brightness and contrast was interesting.It was pretty catchy to read about the implementation of LIC and the impact that the input texture has and how the images are post processed to remove noise. I think I would like to read other related papers to better understand these concepts and the mathematics involved.