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| # data loader | |
| from __future__ import print_function, division | |
| import glob | |
| import torch | |
| from skimage import io, transform, color | |
| import numpy as np | |
| import random | |
| import math | |
| import matplotlib.pyplot as plt | |
| from torch.utils.data import Dataset, DataLoader | |
| from torchvision import transforms, utils | |
| from PIL import Image | |
| #==========================dataset load========================== | |
| class RescaleT(object): | |
| def __init__(self,output_size): | |
| assert isinstance(output_size,(int,tuple)) | |
| self.output_size = output_size | |
| def __call__(self,sample): | |
| imidx, image, label = sample['imidx'], sample['image'],sample['label'] | |
| h, w = image.shape[:2] | |
| if isinstance(self.output_size,int): | |
| if h > w: | |
| new_h, new_w = self.output_size*h/w,self.output_size | |
| else: | |
| new_h, new_w = self.output_size,self.output_size*w/h | |
| else: | |
| new_h, new_w = self.output_size | |
| new_h, new_w = int(new_h), int(new_w) | |
| # #resize the image to new_h x new_w and convert image from range [0,255] to [0,1] | |
| # img = transform.resize(image,(new_h,new_w),mode='constant') | |
| # lbl = transform.resize(label,(new_h,new_w),mode='constant', order=0, preserve_range=True) | |
| img = transform.resize(image,(self.output_size,self.output_size),mode='constant') | |
| lbl = transform.resize(label,(self.output_size,self.output_size),mode='constant', order=0, preserve_range=True) | |
| return {'imidx':imidx, 'image':img,'label':lbl} | |
| class Rescale(object): | |
| def __init__(self,output_size): | |
| assert isinstance(output_size,(int,tuple)) | |
| self.output_size = output_size | |
| def __call__(self,sample): | |
| imidx, image, label = sample['imidx'], sample['image'],sample['label'] | |
| if random.random() >= 0.5: | |
| image = image[::-1] | |
| label = label[::-1] | |
| h, w = image.shape[:2] | |
| if isinstance(self.output_size,int): | |
| if h > w: | |
| new_h, new_w = self.output_size*h/w,self.output_size | |
| else: | |
| new_h, new_w = self.output_size,self.output_size*w/h | |
| else: | |
| new_h, new_w = self.output_size | |
| new_h, new_w = int(new_h), int(new_w) | |
| # #resize the image to new_h x new_w and convert image from range [0,255] to [0,1] | |
| img = transform.resize(image,(new_h,new_w),mode='constant') | |
| lbl = transform.resize(label,(new_h,new_w),mode='constant', order=0, preserve_range=True) | |
| return {'imidx':imidx, 'image':img,'label':lbl} | |
| class RandomCrop(object): | |
| def __init__(self,output_size): | |
| assert isinstance(output_size, (int, tuple)) | |
| if isinstance(output_size, int): | |
| self.output_size = (output_size, output_size) | |
| else: | |
| assert len(output_size) == 2 | |
| self.output_size = output_size | |
| def __call__(self,sample): | |
| imidx, image, label = sample['imidx'], sample['image'], sample['label'] | |
| if random.random() >= 0.5: | |
| image = image[::-1] | |
| label = label[::-1] | |
| h, w = image.shape[:2] | |
| new_h, new_w = self.output_size | |
| top = np.random.randint(0, h - new_h) | |
| left = np.random.randint(0, w - new_w) | |
| image = image[top: top + new_h, left: left + new_w] | |
| label = label[top: top + new_h, left: left + new_w] | |
| return {'imidx':imidx,'image':image, 'label':label} | |
| class ToTensor(object): | |
| """Convert ndarrays in sample to Tensors.""" | |
| def __call__(self, sample): | |
| imidx, image, label = sample['imidx'], sample['image'], sample['label'] | |
| tmpImg = np.zeros((image.shape[0],image.shape[1],3)) | |
| tmpLbl = np.zeros(label.shape) | |
| image = image/np.max(image) | |
| if(np.max(label)<1e-6): | |
| label = label | |
| else: | |
| label = label/np.max(label) | |
| if image.shape[2]==1: | |
| tmpImg[:,:,0] = (image[:,:,0]-0.485)/0.229 | |
| tmpImg[:,:,1] = (image[:,:,0]-0.485)/0.229 | |
| tmpImg[:,:,2] = (image[:,:,0]-0.485)/0.229 | |
| else: | |
| tmpImg[:,:,0] = (image[:,:,0]-0.485)/0.229 | |
| tmpImg[:,:,1] = (image[:,:,1]-0.456)/0.224 | |
| tmpImg[:,:,2] = (image[:,:,2]-0.406)/0.225 | |
| tmpLbl[:,:,0] = label[:,:,0] | |
| tmpImg = tmpImg.transpose((2, 0, 1)) | |
| tmpLbl = label.transpose((2, 0, 1)) | |
| return {'imidx':torch.from_numpy(imidx), 'image': torch.from_numpy(tmpImg), 'label': torch.from_numpy(tmpLbl)} | |
| class ToTensorLab(object): | |
| """Convert ndarrays in sample to Tensors.""" | |
| def __init__(self,flag=0): | |
| self.flag = flag | |
| def __call__(self, sample): | |
| imidx, image, label =sample['imidx'], sample['image'], sample['label'] | |
| tmpLbl = np.zeros(label.shape) | |
| if(np.max(label)<1e-6): | |
| label = label | |
| else: | |
| label = label/np.max(label) | |
| # change the color space | |
| if self.flag == 2: # with rgb and Lab colors | |
| tmpImg = np.zeros((image.shape[0],image.shape[1],6)) | |
| tmpImgt = np.zeros((image.shape[0],image.shape[1],3)) | |
| if image.shape[2]==1: | |
| tmpImgt[:,:,0] = image[:,:,0] | |
| tmpImgt[:,:,1] = image[:,:,0] | |
| tmpImgt[:,:,2] = image[:,:,0] | |
| else: | |
| tmpImgt = image | |
| tmpImgtl = color.rgb2lab(tmpImgt) | |
| # nomalize image to range [0,1] | |
| tmpImg[:,:,0] = (tmpImgt[:,:,0]-np.min(tmpImgt[:,:,0]))/(np.max(tmpImgt[:,:,0])-np.min(tmpImgt[:,:,0])) | |
| tmpImg[:,:,1] = (tmpImgt[:,:,1]-np.min(tmpImgt[:,:,1]))/(np.max(tmpImgt[:,:,1])-np.min(tmpImgt[:,:,1])) | |
| tmpImg[:,:,2] = (tmpImgt[:,:,2]-np.min(tmpImgt[:,:,2]))/(np.max(tmpImgt[:,:,2])-np.min(tmpImgt[:,:,2])) | |
| tmpImg[:,:,3] = (tmpImgtl[:,:,0]-np.min(tmpImgtl[:,:,0]))/(np.max(tmpImgtl[:,:,0])-np.min(tmpImgtl[:,:,0])) | |
| tmpImg[:,:,4] = (tmpImgtl[:,:,1]-np.min(tmpImgtl[:,:,1]))/(np.max(tmpImgtl[:,:,1])-np.min(tmpImgtl[:,:,1])) | |
| tmpImg[:,:,5] = (tmpImgtl[:,:,2]-np.min(tmpImgtl[:,:,2]))/(np.max(tmpImgtl[:,:,2])-np.min(tmpImgtl[:,:,2])) | |
| # tmpImg = tmpImg/(np.max(tmpImg)-np.min(tmpImg)) | |
| tmpImg[:,:,0] = (tmpImg[:,:,0]-np.mean(tmpImg[:,:,0]))/np.std(tmpImg[:,:,0]) | |
| tmpImg[:,:,1] = (tmpImg[:,:,1]-np.mean(tmpImg[:,:,1]))/np.std(tmpImg[:,:,1]) | |
| tmpImg[:,:,2] = (tmpImg[:,:,2]-np.mean(tmpImg[:,:,2]))/np.std(tmpImg[:,:,2]) | |
| tmpImg[:,:,3] = (tmpImg[:,:,3]-np.mean(tmpImg[:,:,3]))/np.std(tmpImg[:,:,3]) | |
| tmpImg[:,:,4] = (tmpImg[:,:,4]-np.mean(tmpImg[:,:,4]))/np.std(tmpImg[:,:,4]) | |
| tmpImg[:,:,5] = (tmpImg[:,:,5]-np.mean(tmpImg[:,:,5]))/np.std(tmpImg[:,:,5]) | |
| elif self.flag == 1: #with Lab color | |
| tmpImg = np.zeros((image.shape[0],image.shape[1],3)) | |
| if image.shape[2]==1: | |
| tmpImg[:,:,0] = image[:,:,0] | |
| tmpImg[:,:,1] = image[:,:,0] | |
| tmpImg[:,:,2] = image[:,:,0] | |
| else: | |
| tmpImg = image | |
| tmpImg = color.rgb2lab(tmpImg) | |
| # tmpImg = tmpImg/(np.max(tmpImg)-np.min(tmpImg)) | |
| tmpImg[:,:,0] = (tmpImg[:,:,0]-np.min(tmpImg[:,:,0]))/(np.max(tmpImg[:,:,0])-np.min(tmpImg[:,:,0])) | |
| tmpImg[:,:,1] = (tmpImg[:,:,1]-np.min(tmpImg[:,:,1]))/(np.max(tmpImg[:,:,1])-np.min(tmpImg[:,:,1])) | |
| tmpImg[:,:,2] = (tmpImg[:,:,2]-np.min(tmpImg[:,:,2]))/(np.max(tmpImg[:,:,2])-np.min(tmpImg[:,:,2])) | |
| tmpImg[:,:,0] = (tmpImg[:,:,0]-np.mean(tmpImg[:,:,0]))/np.std(tmpImg[:,:,0]) | |
| tmpImg[:,:,1] = (tmpImg[:,:,1]-np.mean(tmpImg[:,:,1]))/np.std(tmpImg[:,:,1]) | |
| tmpImg[:,:,2] = (tmpImg[:,:,2]-np.mean(tmpImg[:,:,2]))/np.std(tmpImg[:,:,2]) | |
| else: # with rgb color | |
| tmpImg = np.zeros((image.shape[0],image.shape[1],3)) | |
| image = image/np.max(image) | |
| if image.shape[2]==1: | |
| tmpImg[:,:,0] = (image[:,:,0]-0.485)/0.229 | |
| tmpImg[:,:,1] = (image[:,:,0]-0.485)/0.229 | |
| tmpImg[:,:,2] = (image[:,:,0]-0.485)/0.229 | |
| else: | |
| tmpImg[:,:,0] = (image[:,:,0]-0.485)/0.229 | |
| tmpImg[:,:,1] = (image[:,:,1]-0.456)/0.224 | |
| tmpImg[:,:,2] = (image[:,:,2]-0.406)/0.225 | |
| tmpLbl[:,:,0] = label[:,:,0] | |
| tmpImg = tmpImg.transpose((2, 0, 1)) | |
| tmpLbl = label.transpose((2, 0, 1)) | |
| return {'imidx':torch.from_numpy(imidx), 'image': torch.from_numpy(tmpImg), 'label': torch.from_numpy(tmpLbl)} | |
| class SalObjDataset(Dataset): | |
| def __init__(self,img_name_list,lbl_name_list,transform=None): | |
| # self.root_dir = root_dir | |
| # self.image_name_list = glob.glob(image_dir+'*.png') | |
| # self.label_name_list = glob.glob(label_dir+'*.png') | |
| self.image_name_list = img_name_list | |
| self.label_name_list = lbl_name_list | |
| self.transform = transform | |
| def __len__(self): | |
| return len(self.image_name_list) | |
| def __getitem__(self,idx): | |
| # image = Image.open(self.image_name_list[idx])#io.imread(self.image_name_list[idx]) | |
| # label = Image.open(self.label_name_list[idx])#io.imread(self.label_name_list[idx]) | |
| image = io.imread(self.image_name_list[idx]) | |
| imname = self.image_name_list[idx] | |
| imidx = np.array([idx]) | |
| if(0==len(self.label_name_list)): | |
| label_3 = np.zeros(image.shape) | |
| else: | |
| label_3 = io.imread(self.label_name_list[idx]) | |
| label = np.zeros(label_3.shape[0:2]) | |
| if(3==len(label_3.shape)): | |
| label = label_3[:,:,0] | |
| elif(2==len(label_3.shape)): | |
| label = label_3 | |
| if(3==len(image.shape) and 2==len(label.shape)): | |
| label = label[:,:,np.newaxis] | |
| elif(2==len(image.shape) and 2==len(label.shape)): | |
| image = image[:,:,np.newaxis] | |
| label = label[:,:,np.newaxis] | |
| sample = {'imidx':imidx, 'image':image, 'label':label} | |
| if self.transform: | |
| sample = self.transform(sample) | |
| return sample |