templateMatches

addon

Here is the implementation
https://github.com/peterbraden/node-opencv/blob/master/src/Matrix.cc#L1736

The argument preprocessing is bad, you should probably specify all.

js

var matchMatrix = sourceMatrix.matchTemplate(targetMatrix, 0 /* TM_SQDIFF */);
var matches = matchMatrix.templateMatches(
  minProbability,
  maxProbability,
  limit, 
  ascending, // true/false, lower probability score is better, use for TM_SQDIFF/0 and TM_SQDIFF_NORMED/1
  minXDistance,
  minYDistance
);

// matches is now an array of matches sorted by probability
// each match has properties x, y and probability
// minXDistance and minYDistance is optionally used to filter out the best of neighbouring matches
// so if you dont want to find overlapping matches, set these to targetWidth/2 and targetHeight/2 as ints.