siamese-TF.py

from model import Tower
from utils import model_property
import tensorflow as tf
import tensorflow.contrib.slim as slim
import utils as digits


class UserModel(Tower):

    @model_property
    def inference(self):
        _x = tf.reshape(self.x, shape=[-1, self.input_shape[0], self.input_shape[1], self.input_shape[2]])
        # tf.image_summary(_x.op.name, _x, max_images=10, collections=[digits.GraphKeys.SUMMARIES_TRAIN])

        # Split out the color channels
        _, model_g, model_b = tf.split(_x, 3, 3, name='split_channels')
        # tf.image_summary(model_g.op.name, model_g, max_images=10, collections=[digits.GraphKeys.SUMMARIES_TRAIN])
        # tf.image_summary(model_b.op.name, model_b, max_images=10, collections=[digits.GraphKeys.SUMMARIES_TRAIN])

        with slim.arg_scope([slim.conv2d, slim.fully_connected],
                            weights_initializer=tf.contrib.layers.xavier_initializer(),
                            weights_regularizer=slim.l2_regularizer(0.0005)):
            with tf.variable_scope("siamese") as scope:
                def make_tower(net):
                    net = slim.conv2d(net, 20, [5, 5], padding='VALID', scope='conv1')
                    net = slim.max_pool2d(net, [2, 2], padding='VALID', scope='pool1')
                    net = slim.conv2d(net, 50, [5, 5], padding='VALID', scope='conv2')
                    net = slim.max_pool2d(net, [2, 2], padding='VALID', scope='pool2')
                    net = slim.flatten(net)
                    net = slim.fully_connected(net, 500, scope='fc1')
                    net = slim.fully_connected(net, 2, activation_fn=None, scope='fc2')
                    return net

                model_g = make_tower(model_g)
                model_g = tf.reshape(model_g, shape=[-1, 2])
                scope.reuse_variables()
                model_b = make_tower(model_b)
                model_b = tf.reshape(model_b, shape=[-1, 2])

                return [model_g, model_b]

    @model_property
    def loss(self):
        _y = tf.reshape(self.y, shape=[-1])
        _y = tf.to_float(_y)
        model = self.inference
        return digits.constrastive_loss(model[0], model[1], _y)