Authors: Wayne Rasband (wsr at nih.gov) and Kevin (Gali) Baler Limitations: Only works with 8-bit images or stacks. Source: Image_Correlator.java Installation: Copy Image_Correlator.class to the plugins folder and restart ImageJ. Description: Generates an XY plot and correlation coefficient that indicate how well correlated two images or stacks are. Uses the value of a given pixel in the first image as the x-coordinate and the value of the corresponding pixel in the second image as the y-coordinate. These are plotted into a new window or stack to give a scatter plot. The plugin uses Process/Equalize to enhance the contrast of the scatter plot. Check "Display Counts" in the dialog and the non-zero scatter plot counts will be displayed in a window.
History: 2001/03/21: First version
2002/04/10: Lists counts in window
2003/09/30: Recording now works
2003/11/19: Works with stacks. Plot is contrast enhanced.
2003/11/21: Added "Collate Z-Data" option. Supports counts>65535.
2013/01/28: Calculates correlation coefficient
See Also: Gary Chinga's Image CorrelationJ plugin