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import pandas as _pd |
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from skimage import io as _io |
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import matplotlib.pyplot as _plt |
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from pathlib import Path as _Path |
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from PIL import Image as _Image |
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import warnings as _warnings |
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_warnings.filterwarnings("ignore") |
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_plt.ion() |
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class MORRIS(): |
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_storage_csv='morris.csv' |
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_storage_jpg='jpgs' |
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def __init__(self,root=_Path(__file__).parent,transform=False): |
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self.storage = _Path(root) |
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self.transform = transform |
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self.index = _pd.read_csv(self.storage / self._storage_csv) |
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def torch(self): |
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import torch |
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from torchvision import transforms |
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class MORRISTORCH(torch.utils.data.Dataset,MORRIS): |
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def __init__(self,root=_Path(__file__).parent,transform=False): |
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super().__init__(root,transform) |
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def show(self,idx): |
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name=None |
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if isinstance(idx,str): |
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if idx in self.index.name.values: |
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idx = self.index.index[self.index.name==idx][0] |
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idx = int(idx) |
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name = self.index.name[idx] |
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print(f"found item {idx} by name {name}") |
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else: |
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raise ValueError('item name not found') |
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if isinstance(idx,int): |
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name = self.index.name[idx] |
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_plt.title(name) |
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_plt.imshow(transforms.ToPILImage()(self.__getitem__(idx)[0])) |
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else: |
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_plt.imshow(transforms.ToPILImage()(idx)) |
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def __getitem__(self,idx): |
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item = self.index.iloc[idx].to_dict() |
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image = _io.imread(self.storage / self._storage_jpg / self.index.iloc[idx].filename) |
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image = torch.tensor(image).permute(2,0,1) |
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if self.transform: |
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image = self.transform(image) |
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item = [image,item['name'],item['year']] |
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return item |
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return MORRISTORCH(str(self.storage),self.transform) |
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def __len__(self): |
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return len(self.index) |
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def __getitem__(self,idx): |
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item = self.index.iloc[idx].to_dict() |
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image = _io.imread(self.storage / self._storage_jpg / self.index.iloc[idx].filename) |
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if self.transform: |
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image = self.transform(image) |
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item['image'] = image |
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return item |
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def show(self,idx): |
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if isinstance(idx,str): |
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if idx in self.index.name.values: |
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idx = self.index.index[self.index.name==idx][0] |
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idx = int(idx) |
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name = self.index.name[idx] |
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print(f"found item {idx} by name {name}") |
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else: |
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raise ValueError('item name not found') |
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if isinstance(idx,int): |
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_item = self.__getitem__(idx) |
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image = _item['image'] |
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name = _item['name'] |
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_plt.title(name) |
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_plt.imshow(_Image.fromarray(image)) |
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else: |
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try: |
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_plt.imshow(_Image.fromarray(idx)) |
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except AttributeError: |
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_plt.imshow(_Image.fromarray(idx.permute(1,2,0).numpy())) |
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def _self_validate(self): |
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"""try loading each image in the dataset""" |
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allgood=True |
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for idx in range(len(self)): |
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try: |
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self[idx] |
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except: |
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allgood=False |
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print(f"couldn't load {self.index.iloc[idx].filename}") |
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if allgood: |
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print(f"All good. {len(self)} images loadable.") |
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class Deframe(object): |
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"""check for uniform color boundaries on edges of input and crop them away""" |
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from torch import Tensor |
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def __init__(self,aggressive=False,maxPixelFrame=20): |
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self.alpha = 0.1 if aggressive else 0.01 |
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self.maxPixelFrame = maxPixelFrame |
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def _map2idx(self,frameMap): |
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try: |
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return frameMap.tolist().index(False) |
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except ValueError: |
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return self.maxPixelFrame |
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def _Border(self,img: Tensor): |
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""" take greyscale Tensor |
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return left,right,top,bottom border size identified """ |
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import torch |
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top = left = right = bottom = 0 |
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hvar,wvar = torch.mean(torch.var(img,dim=0)), torch.mean(torch.var(img,dim=1)) |
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top = torch.var(img[:self.maxPixelFrame,:],dim=1) < wvar*(1+self.alpha) |
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top = self._map2idx(top) |
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bottom = torch.var(img[-self.maxPixelFrame:,:],dim=1) < wvar*(1+self.alpha) |
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bottom = self._map2idx(bottom) |
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left = torch.var(img[:,:self.maxPixelFrame],dim=0) < hvar*(1+self.alpha) |
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left = self._map2idx(left) |
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right = torch.var(img[:,-self.maxPixelFrame:],dim=0) < hvar*(1+self.alpha) |
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right = self._map2idx(right) |
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return (top,bottom,right,left) |
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def __call__(self,img: Tensor): |
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import torchvision |
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top,bottom,right,left = self._Border(torchvision.transforms.Grayscale()(img)[0]) |
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height = img.shape[1]-(top+bottom) |
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width = img.shape[2]-(left+right) |
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print(f"t{top} b{bottom} l{left} r{right}") |
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return torchvision.transforms.functional.crop(img,top,left,height,width) |
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