There is no relevant information regarding the calorie content of fresh nipa palm fruit in 1 gram in the provided search results.

Key Insights

• The search results primarily focus on calorie estimation methods using computer vision and deep learning techniques for various foods, but do not provide specific data on nipa palm fruit
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• Research on date palms and other palm species is mentioned, but it does not include specific nutritional information about nipa palm fruit
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Conclusion

While the search results provide valuable insights into calorie estimation methods and the study of palm species, they do not contain specific information on the calorie content of fresh nipa palm fruit per gram. Further research or specific nutritional databases would be required to obtain this information.