Average Precision in evaluation script? about coco-text

[sravya8]

I see there is an offline evaluation script provided in the competition website in the "My methods page". Here is the snippet for AP calculation, comments are mine:

for n in range(len(confList)): #Num predictions
                match = matchList[n]
                if match:
                    correct += 1
                    AP += float(correct)/(n + 1) #rel(n) missing?
            if numGtCare>0:
                AP /= numGtCare

Is there a rel(n) term missing ? Also, from competition page it seems like evaluation is based on VOC style AP. In that case, should'nt the script use interpolated Precision for intervals of confidence?