MaskRCNN 奔跑自己的数据

Posted 2021-02-11 bambooeatpanda

import os
import sys
import random
import math
import re
import time
import numpy as np
import cv2
import matplotlib
import matplotlib.pyplot as plt
from PIL import Image


# Root directory of the project
ROOT_DIR = os.path.abspath("../../")

# Import Mask RCNN
sys.path.append(ROOT_DIR)  # To find local version of the library
from mrcnn.config import Config
from mrcnn import utils
import mrcnn.model as modellib
from mrcnn import visualize
from mrcnn.model import log

#%matplotlib inline 

# Directory to save logs and trained model
MODEL_DIR = os.path.join(ROOT_DIR, "logs")

# Local path to trained weights file
COCO_MODEL_PATH = os.path.join(ROOT_DIR, "mask_rcnn_coco.h5")
# Download COCO trained weights from Releases if needed
if not os.path.exists(COCO_MODEL_PATH):
    utils.download_trained_weights(COCO_MODEL_PATH)

iter_num=0

　　

Configurations

class ShapesConfig(Config):
    """Configuration for training on the toy shapes dataset.
    Derives from the base Config class and overrides values specific
    to the toy shapes dataset.
    """
    # Give the configuration a recognizable name
    NAME = "shapes"

    # Train on 1 GPU and 8 images per GPU. We can put multiple images on each
    # GPU because the images are small. Batch size is 8 (GPUs * images/GPU).
    GPU_COUNT = 2
    IMAGES_PER_GPU = 1 #这里我用了两个GPU

    # Number of classes (including background)
    NUM_CLASSES = 1 + 1  # background + 1 shapes

    # Use small images for faster training. Set the limits of the small side
    # the large side, and that determines the image shape.
    IMAGE_MIN_DIM = 1080
    IMAGE_MAX_DIM = 1920

    # Use smaller anchors because our image and objects are small
    RPN_ANCHOR_SCALES = (8*6, 16*6, 32*6, 64*6, 128*6)  # anchor side in pixels

    # Reduce training ROIs per image because the images are small and have
    # few objects. Aim to allow ROI sampling to pick 33% positive ROIs.
    TRAIN_ROIS_PER_IMAGE = 32

    # Use a small epoch since the data is simple
    STEPS_PER_EPOCH = 100

    # use small validation steps since the epoch is small
    VALIDATION_STEPS = 5
    
config = ShapesConfig()
config.display()

　　Notebook Preference

def get_ax(rows=1, cols=1, size=8):
    """Return a Matplotlib Axes array to be used in
    all visualizations in the notebook. Provide a
    central point to control graph sizes.
    
    Change the default size attribute to control the size
    of rendered images
    """
    _, ax = plt.subplots(rows, cols, figsize=(size*cols, size*rows))
    return ax

　　Dataset

class DrugDataset(utils.Dataset):
    
    #得到该图中有多少个实例（物体）
    def get_obj_index(self, image):
        n = np.max(image)
        return n
    #解析labelme中得到的yaml文件，从而得到mask每一层对应的实例标签
    def from_yaml_get_class(self,image_id):
        info=self.image_info[image_id]
        with open(info[‘yaml_path‘]) as f:
            temp=yaml.load(f.read())
            labels=temp[‘label_names‘]
            del labels[0]
        return labels
    #重新写draw_mask
    def draw_mask(self, num_obj, mask, image):
        info = self.image_info[image_id]
        for index in range(num_obj):
            for i in range(info[‘width‘]):
                for j in range(info[‘height‘]):
                    at_pixel = image.getpixel((i, j))
                    if at_pixel == index + 1:
                        mask[j, i, index] =1
        return mask
    #重新写load_shapes，里面包含自己的自己的类别（我的是box、column、package、fruit四类）
    #并在self.image_info信息中添加了path、mask_path 、yaml_path
    def load_shapes(self, count, height, width, img_floder, mask_floder, imglist,dataset_root_path):
        """Generate the requested number of synthetic images.
        count: number of images to generate.
        height, width: the size of the generated images.
        """
        # Add classes
        self.add_class("shapes", 1, "box")
        
        for i in range(count):
            filestr = imglist[i].split(".")[0]
            filestr = filestr.split("_")[0]
            mask_path = mask_floder + "/" + filestr + ".png"
            yaml_path=dataset_root_path+filestr+"rgb_"+"_json/info.yaml"
            self.add_image("shapes", image_id=i, path=img_floder + "/"+imglist[i],
                           width=width, height=height, mask_path=mask_path,yaml_path=yaml_path)
    #重写load_mask
    def load_mask(self, image_id):
        """Generate instance masks for shapes of the given image ID.
        """
        global iter_num
        info = self.image_info[image_id]
        count = 1  # number of object
        img = Image.open(info[‘mask_path‘])
        num_obj = self.get_obj_index(img)
        mask = np.zeros([info[‘height‘], info[‘width‘], num_obj], dtype=np.uint8)
        mask = self.draw_mask(num_obj, mask, img)
        occlusion = np.logical_not(mask[:, :, -1]).astype(np.uint8)
        for i in range(count - 2, -1, -1):
            mask[:, :, i] = mask[:, :, i] * occlusion
            occlusion = np.logical_and(occlusion, np.logical_not(mask[:, :, i]))
        labels=[]
        labels=self.from_yaml_get_class(image_id)
        labels_form=[]
        for i in range(len(labels)):
            if labels[i].find("box")!=-1:
                #print "box"
                labels_form.append("box")
            #elif labels[i].find("column")!=-1:
                #print "column"
             #   labels_form.append("column")
            #elif labels[i].find("package")!=-1:
                #print "package"
             #   labels_form.append("package")
            #elif labels[i].find("fruit")!=-1:
                #print "fruit"
             #   labels_form.append("fruit")
        class_ids = np.array([self.class_names.index(s) for s in labels_form])
        return mask, class_ids.astype(np.int32)

　　基础设置

#基础设置
dataset_root_path="/mnt/disk2/zhouqiang/Mask_RCNN/data/train_01_01/"
img_floder = dataset_root_path+"rgb"
mask_floder = dataset_root_path+"mask"
#yaml_floder = dataset_root_path
imglist = os.listdir(img_floder)
count = len(imglist)
width = 1920
height = 1080

#train与val数据集准备
dataset_train = DrugDataset()
dataset_train.load_shapes(count, 1080, 1920, img_floder, mask_floder, imglist,dataset_root_path)
dataset_train.prepare()

dataset_val = DrugDataset()
dataset_val.load_shapes(count, 1080, 1920, img_floder, mask_floder, imglist,dataset_root_path)
dataset_val.prepare()

　　Create Model

# Create model in training mode
model = modellib.MaskRCNN(mode="training", config=config,
                          model_dir=MODEL_DIR)

　

# Which weights to start with?
init_with = "coco"  # imagenet, coco, or last

if init_with == "imagenet":
    model.load_weights(model.get_imagenet_weights(), by_name=True)
elif init_with == "coco":
    # Load weights trained on MS COCO, but skip layers that
    # are different due to the different number of classes
    # See README for instructions to download the COCO weights
    model.load_weights(COCO_MODEL_PATH, by_name=True,
                       exclude=["mrcnn_class_logits", "mrcnn_bbox_fc", 
                                "mrcnn_bbox", "mrcnn_mask"])
elif init_with == "last":
    # Load the last model you trained and continue training
    model.load_weights(model.find_last(), by_name=True)

　　

# Fine tune all layers
# Passing layers="all" trains all layers. You can also 
# pass a regular expression to select which layers to
# train by name pattern.
model.train(dataset_train, dataset_val, 
            learning_rate=config.LEARNING_RATE / 10,
            epochs=50, 
            layers="all")