User Tools
macro:stddev_correlation
Differences
This shows you the differences between two versions of the page.
| — |
macro:stddev_correlation [2019/04/12 11:13] (current) |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| + | ====== Standard Deviation-Based Correlation ====== | ||
| + | |||
| + | **A macro to determine image focal quality image-wide (not ROI-wide)** | ||
| + | |||
| + | <code java> | ||
| + | |||
| + | // A macro to determine image focal quality image-wide (not ROI-wide) | ||
| + | // Based on algorithm F-13 "Standard Deviation-Based Correlation" | ||
| + | // In: Sun et al., 2004. MICROSCOPY RESEARCH AND TECHNIQUE 65, 139–149. | ||
| + | // | ||
| + | // Version: 0.1 | ||
| + | // Date: 14/07/2006 | ||
| + | // Author: Andy Weller | ||
| + | |||
| + | macro "Corr_Stddev" { | ||
| + | run("Clear Results"); | ||
| + | run("Set Measurements...", " mean redirect=None decimal=5"); | ||
| + | run("Measure"); | ||
| + | mean = getResult("Mean"); | ||
| + | selectWindow("Results"); | ||
| + | run("Close"); | ||
| + | W = getWidth(); | ||
| + | H = getHeight(); | ||
| + | b = H*W*(mean*mean); | ||
| + | StddevCorr = 0; // Set to 0 which is out of focus | ||
| + | for (j=0; j<H; j++) { | ||
| + | for (i=0; i<W; i++) { | ||
| + | p = getPixel(i,j); | ||
| + | p1 = getPixel(i+1,j); | ||
| + | t = p*p1; | ||
| + | StddevCorr += (p*p1)-b; // Maximum value is best-focused, decreasing as defocus increases | ||
| + | } | ||
| + | } | ||
| + | print(StddevCorr); // This can also (should) be changed to return(StddevCorr) | ||
| + | } | ||
| + | |||
| + | </code> | ||
| + | |||
| + | by Andy Weller — last modified 2006-07-14 20:37 | ||
macro/stddev_correlation.txt · Last modified: 2019/04/12 11:13 (external edit)
Page Tools
