“…The training losses of the EAM contain the pixel‐wise loss:
the cosine similarity loss to ensure colour correctness of the RGB vectors of each pixel:
and the histogram loss in [
22] to ensure that the generated image has a similar global tone with the target image:
where O denotes the ground truth image, L denotes the intensity levels, and cnt l indicates the number of pixels, which has a rounded down intensity l in the input image. The total loss of EAM can be formulated as:
where λ cos and λ hist are set to 5 and 1 separately.…”