Semantically Invariant Text-to-Image Generation
Table 3: Comparison of image quality with different BLEU metrics for scaling the latent vector update function.
['Scaling n-gram Metric', 'Inception Score']
Which degree n-gram is better for scaling ? We compare different BLEU scaling in (3) by varying the n-gram metric. One reason the BLEU-1 performs better than the higher n-gram techniques might be the simple removal of one-to-one word correspondences between the predicted and ground truth captions is sufficient. Higher BLEU metrics require n-gram matching which puts hard constraints on the generated caption. This may dampen the significance on important words in the overall update.