// similarity = e.g. 0.99f
static FoundImg rgbRawImageSearch_searchHereFirst(RGBImage big, RGBImage pat, float similarity, Pt searchHereFirst) {
  int wp = pat.getWidth(), hp = pat.getHeight();
  int w = big.getWidth(), h = big.getHeight();
  float maxError = (1f-similarity)*wp*hp;
  if (searchHereFirst != null) {
    float diff = rgbImageSectionsSimilarity(big, pat, searchHereFirst.x, searchHereFirst.y, maxError);
    if (diff <= maxError) {
      float sim = 1-diff/(wp*hp);
      ret new FoundImg(new Rect(searchHereFirst.x, searchHereFirst.y, wp, hp), sim);
    }
  }
  
  ret first(rgbRawImageSearch_quick(big, pat, similarity, 1));
}