Questions about the evaluation scores on HCI 4D Light Field Benchmark

[RococoLee]

Dear authors of SPO algorithm,
Recently I've run your algorithm SPO on 8 scenes (stratified, training) offered by the HCI 4D light field benchmark, only to find the results completely different from those on the website, with all the parameters set as the website suggested. Then I realized that the conversion between pfm and png format can change the depth map contrast. For example, I tried to convert your results from pfm to png, ang again to pfm, then the scores are totally different. The result maps and scores, as well as the metric overviews are in the attachment. Could you please tell me how to handle this situation? Thank you very much, Looking forward to your reply.