pixelwise_softmax_classifier.py 文件源码

def __call__(self, x, t):
        """Computes the loss value for an image and label pair.

        Args:
            x (~chainer.Variable): A variable with a batch of images.
            t (~chainer.Variable): A variable with the ground truth
                image-wise label.

        Returns:
            ~chainer.Variable: Loss value.

        """
        self.y = self.predictor(x)
        self.loss = F.softmax_cross_entropy(
            self.y, t, class_weight=self.class_weight,
            ignore_label=self.ignore_label)

        reporter.report({'loss': self.loss}, self)
        return self.loss