fixed 2d correlation for negative values

69057bd5 · Andrey Filippov · 22872131 · 69057bd5
Commit 69057bd5 authored Jul 23, 2019 by Andrey Filippov
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Correlation2d.java ...n/java/com/elphel/imagej/tileprocessor/Correlation2d.java +2 -0

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--- a/src/main/java/com/elphel/imagej/tileprocessor/Correlation2d.java
+++ b/src/main/java/com/elphel/imagej/tileprocessor/Correlation2d.java
@@ -1152,6 +1152,8 @@ public class Correlation2d {
    				if (offset >= 0.0) {
    					if ((fc0 > -offset) && (fc1 > -offset)) {
    						cc = Math.sqrt((fc0 + offset) * (fc1 + offset)) - offset;
+    					} else {
+    						cc = -offset; // smallest value
    					}
    				} else {
    					cc =  0.5*(fc0+fc1);