fixed 2d correlation for negative values (69057bd5) · Commits · Elphel / imagej-elphel

src/main/java/com/elphel/imagej/tileprocessor/Correlation2d.java

+2 −0

Original line number	Original line	Diff line number	Diff line
	@@ -1152,6 +1152,8 @@ public class Correlation2d {
	if (offset >= 0.0) {		if (offset >= 0.0) {
	if ((fc0 > -offset) && (fc1 > -offset)) {		if ((fc0 > -offset) && (fc1 > -offset)) {
	cc = Math.sqrt((fc0 + offset) * (fc1 + offset)) - offset;		cc = Math.sqrt((fc0 + offset) * (fc1 + offset)) - offset;
			} else {
			cc = -offset; // smallest value
	}		}
	} else {		} else {
	cc = 0.5*(fc0+fc1);		cc = 0.5*(fc0+fc1);