Cross-plot Muting

A scatter-plot of A vs. B from the synthetic data image used in this study is seen in Figure 4. There is a noticeable clustering of points in the middle of the plot. These correspond to the background values, or those parts of the image that are not associated with a Class III anomaly. The points farthest from the origin in quadrants I (upper-right) and III (lower-left) are parts of the image that are associated with a Class III anomaly. Thus, a mute fairway can be defined where values in the fairway are regarded as background parts of the image (Figure 5). These values are muted, and we are left with a scatter-plot of points where a Class III AVO anomaly is detected (Figure 6). When transformed back into two panels (A and B) and multiplied together (A*B), the resultant image has energy only at areas associated with an interpreted Class III AVO anomaly.