forked from mrq/DL-Art-School
Add meta-anomaly detection, colorjitter augmentation
This commit is contained in:
James Betker
parent
46e9f62be0
commit
6fd16ea9c8
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@ -1,8 +1,13 @@
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import functools
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import random
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from math import cos, pi
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import cv2
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import kornia
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import numpy as np
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import torch
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from kornia.augmentation import ColorJitter
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from data.util import read_img
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from PIL import Image
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from io import BytesIO
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@ -65,29 +70,48 @@ class ImageCorruptor:
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# Sources of entropy
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corrupted_imgs = []
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entropy = []
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undo_fns = []
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applied_augs = augmentations + self.fixed_corruptions
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for img in imgs:
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for aug in augmentations:
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r = self.get_rand()
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img = self.apply_corruption(img, aug, r, applied_augs)
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img, undo_fn = self.apply_corruption(img, aug, r, applied_augs)
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if undo_fn is not None:
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undo_fns.append(undo_fn)
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for aug in self.fixed_corruptions:
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r = self.get_rand()
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img = self.apply_corruption(img, aug, r, applied_augs)
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img, undo_fn = self.apply_corruption(img, aug, r, applied_augs)
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entropy.append(r)
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if undo_fn is not None:
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undo_fns.append(undo_fn)
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# Apply undo_fns after all corruptions are finished, in same order.
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for ufn in undo_fns:
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img = ufn(img)
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corrupted_imgs.append(img)
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if return_entropy:
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return corrupted_imgs, entropy
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else:
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return corrupted_imgs
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def apply_corruption(self, img, aug, rand_val, applied_augmentations):
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undo_fn = None
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if 'color_quantization' in aug:
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# Color quantization
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quant_div = 2 ** (int(rand_val * 10 / 3) + 2)
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img = img * 255
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img = (img // quant_div) * quant_div
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img = img / 255
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elif 'color_jitter' in aug:
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lo_end = 0
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hi_end = .2
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setting = rand_val * (hi_end - lo_end) + lo_end
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if setting * 255 > 1:
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# I'm using Kornia's ColorJitter, which requires pytorch arrays in b,c,h,w format.
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img = torch.from_numpy(img).permute(2,0,1).unsqueeze(0)
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img = ColorJitter(setting, setting, setting, setting)(img)
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img = img.squeeze(0).permute(1,2,0).numpy()
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elif 'gaussian_blur' in aug:
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img = cv2.GaussianBlur(img, (0,0), self.blur_scale*rand_val*1.5)
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elif 'motion_blur' in aug:
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@ -105,14 +129,23 @@ class ImageCorruptor:
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pass
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elif 'lq_resampling' in aug:
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# Random mode interpolation HR->LR->HR
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scale = 2
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if 'lq_resampling4x' == aug:
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scale = 4
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interpolation_modes = [cv2.INTER_NEAREST, cv2.INTER_CUBIC, cv2.INTER_LINEAR, cv2.INTER_LANCZOS4]
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mode = random.randint(0,4) % len(interpolation_modes)
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# Downsample first, then upsample using the random mode.
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img = cv2.resize(img, dsize=(img.shape[1]//scale, img.shape[0]//scale), interpolation=cv2.INTER_NEAREST)
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img = cv2.resize(img, dsize=(img.shape[1]*scale, img.shape[0]*scale), interpolation=mode)
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else:
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if rand_val < .3:
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scale = 1
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elif rand_val < .7:
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scale = 2
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else:
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scale = 4
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if scale > 1:
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interpolation_modes = [cv2.INTER_NEAREST, cv2.INTER_CUBIC, cv2.INTER_LINEAR, cv2.INTER_LANCZOS4]
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mode = random.randint(0,4) % len(interpolation_modes)
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# Downsample first, then upsample using the random mode.
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img = cv2.resize(img, dsize=(img.shape[1]//scale, img.shape[0]//scale), interpolation=mode)
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def lq_resampling_undo_fn(scale, img):
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return cv2.resize(img, dsize=(img.shape[1]*scale, img.shape[0]*scale), interpolation=cv2.INTER_LINEAR)
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undo_fn = functools.partial(lq_resampling_undo_fn, scale)
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elif 'color_shift' in aug:
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# Color shift
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pass
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@ -127,8 +160,8 @@ class ImageCorruptor:
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if 'noise-5' == aug:
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noise_intensity = 5 / 255.0
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else:
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noise_intensity = (rand_val*4 + 2) / 255.0
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img += np.random.randn(*img.shape) * noise_intensity
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noise_intensity = (rand_val*6) / 255.0
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img += np.random.rand(*img.shape) * noise_intensity
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elif 'jpeg' in aug:
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if 'noise' not in applied_augmentations and 'noise-5' not in applied_augmentations:
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if aug == 'jpeg':
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@ -162,7 +195,9 @@ class ImageCorruptor:
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# Lightening / saturation
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saturation = rand_val * .3
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img = np.clip(img + saturation, a_max=1, a_min=0)
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elif 'greyscale' in aug:
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img = np.tile(np.mean(img, axis=2, keepdims=True), [1,1,3])
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elif 'none' not in aug:
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raise NotImplementedError("Augmentation doesn't exist")
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return img
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return img, undo_fn
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@ -266,14 +266,14 @@ if __name__ == '__main__':
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'paths': ['E:\\4k6k\\datasets\\ns_images\\imagesets\\256_only_humans_masked'],
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'weights': [1],
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'target_size': 256,
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'scale': 2,
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'scale': 1,
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'corrupt_before_downsize': True,
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'fetch_alt_image': False,
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'fetch_alt_tiled_image': True,
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'disable_flip': True,
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'fixed_corruptions': [ 'jpeg-medium' ],
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'fixed_corruptions': ['lq_resampling', 'jpeg-medium', 'gaussian_blur', 'noise', 'color_jitter'],
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'num_corrupts_per_image': 0,
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'corruption_blur_scale': 0
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'corruption_blur_scale': 1
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}
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ds = DataLoader(ImageFolderDataset(opt), shuffle=True, num_workers=0, batch_size=64)
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@ -1,3 +1,4 @@
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import functools
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from abc import abstractmethod
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import math
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@ -702,7 +703,7 @@ class ResNetEncoder(nn.Module):
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) -> None:
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super(ResNetEncoder, self).__init__()
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if norm_layer is None:
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norm_layer = nn.BatchNorm2d
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norm_layer = functools.partial(nn.GroupNorm, 8)
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self._norm_layer = norm_layer
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self.inplanes = 64
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@ -812,12 +813,10 @@ class UnetWithBuiltInLatentEncoder(nn.Module):
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}
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super().__init__()
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self.encoder = ResNetEncoder(depth=depth_map[kwargs['image_size']])
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self.lq_jitter = ColorJitter(.05, .05, .05, .05)
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self.unet = SuperResModel(**kwargs)
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def forward(self, x, timesteps, alt_hq, low_res=None, **kwargs):
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latent = self.encoder(alt_hq)
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low_res = self.lq_jitter((low_res+1)/2)*2-1
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return self.unet(x, timesteps, latent, low_res, **kwargs)
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@ -97,7 +97,8 @@ class Trainer:
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torch.backends.cudnn.benchmark = True
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# torch.backends.cudnn.deterministic = True
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# torch.autograd.set_detect_anomaly(True)
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if opt_get(opt, ['anomaly_detection'], False):
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torch.autograd.set_detect_anomaly(True)
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# Save the compiled opt dict to the global loaded_options variable.
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util.loaded_options = opt
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@ -254,6 +254,13 @@ class ExtensibleTrainer(BaseModel):
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# And finally perform optimization.
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[e.before_optimize(state) for e in self.experiments]
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s.do_step(step)
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if s.nan_counter > 10:
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print("Detected NaN grads more than 10 steps in a row. Saving model weights and aborting.")
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self.save(step)
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self.save_training_state(0, step)
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raise ArithmeticError
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# Call into custom step hooks as well as update EMA params.
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for name, net in self.networks.items():
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if hasattr(net, "custom_optimizer_step"):
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@ -28,6 +28,13 @@ class ConfigurableStep(Module):
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self.grads_generated = False
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self.min_total_loss = opt_step['min_total_loss'] if 'min_total_loss' in opt_step.keys() else -999999999
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# This is a half-measure that can be used between anomaly_detection and running a potentially problematic
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# trainer bare. With this turned on, the optimizer will not step() if a nan grad is detected. If a model trips
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# this warning 10 times in a row, the training session is aborted and the model state is saved. This has a
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# noticeable affect on training speed, but nowhere near as bad as anomaly_detection.
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self.check_grads_for_nan = opt_get(opt_step, ['check_grads_for_nan'], False)
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self.nan_counter = 0
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self.injectors = []
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if 'injectors' in self.step_opt.keys():
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injector_names = []
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@ -244,8 +251,25 @@ class ConfigurableStep(Module):
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before = opt._config['before'] if 'before' in opt._config.keys() else -1
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if before != -1 and self.env['step'] > before:
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continue
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self.scaler.step(opt)
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self.scaler.update()
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nan_found = False
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if self.check_grads_for_nan:
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for pg in opt.param_groups:
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for p in pg['params']:
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if not torch.isfinite(p.grad).any():
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nan_found = True
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break
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if nan_found:
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break
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if nan_found:
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print("NaN found in grads. Throwing this step out.")
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self.nan_counter += 1
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else:
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self.nan_counter = 0
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if not nan_found:
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self.scaler.step(opt)
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self.scaler.update()
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def get_metrics(self):
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return self.loss_accumulator.as_dict()
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