TABLE_DETECTION/train.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Thu Sep 9 23:11:51 2020

@author: chineseocr
"""
import json
import os
import sys
sys.path.append('train')
from table_line import model, focal_loss, dice_coef, dice_coef_loss
from tensorflow.keras.optimizers import Adam
from tensorflow.keras.callbacks import ModelCheckpoint, ReduceLROnPlateau
from sklearn.model_selection import train_test_split
from glob import glob
from image import gen
from config import tableModeLinePath
import keras

PRETRAINED = True
CHECKPOINT = False


if __name__ == '__main__':
    if PRETRAINED:
        model.load_weights(tableModeLinePath)
        print("read pretrained model")
    else:
        print("no pretrained")

    if CHECKPOINT:
        model.load_weights("checkpoint/table-line")
        print("read checkpoint model")
    else:
        print("no checkpoint")

    # 模型权重存放位置
    filepath = 'models/table-line.h5'
    # filepath = 'table-line-{epoch:02d}-{val_loss:.2f}.h5'

    checkpointer = ModelCheckpoint(filepath=filepath, monitor='loss', verbose=0,
                                   save_weights_only=True, save_best_only=True)
    rlu = ReduceLROnPlateau(monitor='loss', factor=0.1, patience=5,
                            verbose=0, mode='auto', cooldown=0, min_lr=0)
    model.compile(optimizer=Adam(lr=0.0003), loss=focal_loss(),
                  metrics=['acc', keras.metrics.Precision(), keras.metrics.Recall()])

    # table line dataset label with labelme
    paths = glob('train/dataset-line/6/*.json')
    # print("paths", paths)
    print("len(paths)", len(paths))

    paths = paths[:3000]

    # 限制长度
    # print('len(paths)', len(paths))
    # new_paths = []
    # for path in paths:
    #     with open(path) as f:
    #         jsonData = json.loads(f.read())
    #     image_height = jsonData.get('imageHeight')
    #     if image_height <= 1200:
    #         new_paths.append(path)
    # paths = new_paths
    # print('len(new_paths)', len(new_paths))

    trainP, testP = train_test_split(paths, test_size=0.1)
    print('total:', len(paths), 'train:', len(trainP), 'test:', len(testP))

    batchsize = 3
    trainloader = gen(trainP, batchsize=batchsize, linetype=1)
    testloader = gen(testP, batchsize=batchsize, linetype=1)
    model.fit_generator(trainloader,
                        steps_per_epoch=max(1, len(trainP) // batchsize),
                        callbacks=[checkpointer],
                        validation_data=testloader,
                        validation_steps=max(1, len(testP) // batchsize),
                        epochs=2000)