Getting peak_value > 1

[aseuteurideu]

When I checked detect method's both double pv and float peak_value variables after peak_value = (float) pv; line, sometimes I got value more than 1.0 (mostly still less than 1.1 but can be higher). Have any idea what would be the problem?

Edit:
it happens when HOG is set False

[guyiyifeurach]

cv::Point2f res = detect(_tmpl, getFeatures(image, 0, 1.0f), peak_value);
I get peak_value,and it is really bigger than 1,in the case that HOG is false.I meet the same situation.