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from tensorboardX import SummaryWriter
import torch
from PIL import Image
import os
def tensor_for_board(img_tensor):
# map into [0,1]
tensor = (img_tensor.clone()+1) * 0.5
tensor.cpu().clamp(0, 1)
if tensor.size(1) == 1:
tensor = tensor.repeat(1, 3, 1, 1)
return tensor
def tensor_list_for_board(img_tensors_list):
grid_h = len(img_tensors_list)
grid_w = max(len(img_tensors) for img_tensors in img_tensors_list)
batch_size, channel, height, width = tensor_for_board(
img_tensors_list[0][0]).size()
canvas_h = grid_h * height
canvas_w = grid_w * width
canvas = torch.FloatTensor(
batch_size, channel, canvas_h, canvas_w).fill_(0.5)
for i, img_tensors in enumerate(img_tensors_list):
for j, img_tensor in enumerate(img_tensors):
offset_h = i * height
offset_w = j * width
tensor = tensor_for_board(img_tensor)
canvas[:, :, offset_h: offset_h + height,
offset_w: offset_w + width].copy_(tensor)
return canvas
def board_add_image(board, tag_name, img_tensor, step_count):
tensor = tensor_for_board(img_tensor)
for i, img in enumerate(tensor):
board.add_image('%s/%03d' % (tag_name, i), img, step_count)
def board_add_images(board, tag_name, img_tensors_list, step_count):
tensor = tensor_list_for_board(img_tensors_list)
for i, img in enumerate(tensor):
board.add_image('%s/%03d' % (tag_name, i), img, step_count)
def save_images(img_tensors, img_names, save_dir):
for img_tensor, img_name in zip(img_tensors, img_names):
tensor = (img_tensor.clone()+1)*0.5 * 255
tensor = tensor.cpu().clamp(0, 255)
array = tensor.numpy().astype('uint8')
if array.shape[0] == 1:
array = array.squeeze(0)
elif array.shape[0] == 3:
array = array.swapaxes(0, 1).swapaxes(1, 2)
Image.fromarray(array).save(os.path.join(save_dir, img_name))
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