UC	Ulcerative colitis
MES	Mayo endoscopic subscore
CNNs	Convolutional neural networks
ViT	Vision Transformer
PvT	Pyramid vision Transformer
${\mathrm{PHF}}^3$	Pyramid hybrid feature fusion framework
FFM	Feature fusion module
SOP	Second-order pooling
FC	Fully connected layer
OPE	Overlapping patch embedding
SR	Spatial reduction
MHA	Multihead attention
SGD	Stochastic gradient descent
ROC	The receiver operating characteristic curve
AUC	The area under the receiver operating characteristic curve
Clahe	Contrast-limited adaptive histogram equalization
GPUs	Graphics processing units