Input channel yaml['ch'] addition (#1741)

models/yolo.py

@@ -1,10 +1,10 @@
 import argparse
 import logging
+import math
 import sys
 from copy import deepcopy
 from pathlib import Path
 
-import math
 import torch
 import torch.nn as nn
 
@@ -78,10 +78,11 @@ class Model(nn.Module):
                 self.yaml = yaml.load(f, Loader=yaml.FullLoader)  # model dict
 
         # Define model
+        ch = self.yaml['ch'] = self.yaml.get('ch', ch)  # input channels
         if nc and nc != self.yaml['nc']:
             logger.info('Overriding model.yaml nc=%g with nc=%g' % (self.yaml['nc'], nc))
             self.yaml['nc'] = nc  # override yaml value
-        self.model, self.save = parse_model(deepcopy(self.yaml), ch=[ch])  # model, savelist, ch_out
+        self.model, self.save = parse_model(deepcopy(self.yaml), ch=[ch])  # model, savelist
         self.names = [str(i) for i in range(self.yaml['nc'])]  # default names
         # print([x.shape for x in self.forward(torch.zeros(1, ch, 64, 64))])