refer/utiltools.py

import os
import time
import copy
import logging

import numpy as np
import torch
import random
import matplotlib.pyplot as plt    

from detectron2.config import configurable
from detectron2.data import detection_utils as utils
from detectron2.data import transforms as T

from transformers import BertTokenizer
from pycocotools import mask as coco_mask

import albumentations as A
# from albumentations.pytorch import ToTensorV2
from PIL import Image, ImageDraw, ImageFilter
from detectron2.utils.visualizer import Visualizer


def convert_coco_poly_to_mask(segmentations, height, width):
    masks = []
    for polygons in segmentations:
        rles = coco_mask.frPyObjects(polygons, height, width)
        mask = coco_mask.decode(rles)
        if len(mask.shape) < 3:
            mask = mask[..., None]
        mask = torch.as_tensor(mask, dtype=torch.uint8)
        mask = mask.any(dim=2)
        masks.append(mask)
    if masks:
        masks = torch.stack(masks, dim=0)
    else:
        masks = torch.zeros((0, height, width), dtype=torch.uint8)
    return masks


def build_transform_train(cfg):
    image_size = cfg.img_size
    # min_scale = cfg.INPUT.MIN_SCALE

    augmentation = []

    augmentation.extend([
        T.Resize((image_size, image_size))
    ])

    return augmentation


def build_transform_test(cfg):
    image_size = cfg.img_size

    augmentation = []

    augmentation.extend([
        T.Resize((image_size, image_size))
    ])

    return augmentation


def COCOVisualization(dataloader, dirname="coco-aug-data-vis"):

    mean = (0.485, 0.456, 0.406)
    std = (0.229, 0.224, 0.225)
    denorm = A.Normalize(
        mean=[-m / s for m, s in zip(mean, std)],
        std=[1.0 / s for s in std],
        max_pixel_value=1.0
    )
    tokenizer = BertTokenizer.from_pretrained("bert-base-uncased")

    sent_idx = 0
    os.makedirs(dirname, exist_ok=True)
    # dataloader = build_detection_train_loader(cfg, mapper=mapper)
    it = iter(dataloader)
    batch = next(it)
    n_sample = random.randint(4, len(batch))
    
    for i in range(n_sample):
        batch = next(it)
        img, gt_mask, lang_tokens, lang_mask = batch
        img_np = np.transpose(img.cpu().numpy(), (1,2,0))
        # img_denorm = denorm(image=img_np)['image']
        # img_ndarray = (img_denorm*255).astype(np.uint8)
        seg_target = gt_mask[:,:].cpu().numpy()
        tokens = lang_tokens.reshape(-1).cpu().numpy()
        sentences = tokenizer.decode(tokens, skip_special_tokens=True)
        fpath = os.path.join(dirname, f'sample_{i+1}.jpg')
        fig = plt.figure(figsize=(10,6))
        ax1 = fig.add_subplot(1,2,1)
        ax1.imshow(img_np.astype('uint8'))
        ax1.set_xlabel("Mosaic Image")
        ax2 = fig.add_subplot(1,2,2)
        ax2.imshow(seg_target)
        ax2.set_xlabel("Segmentation Map")
        plt.suptitle(sentences)
        plt.tight_layout()
        plt.savefig(fpath)
    
    # if 'gt_masks' in batch[0].keys():
    #     for i in range(n_sample):
    #         data = batch[i]
    #         img = data['image'].unsqueeze(0)
    #         img_np = np.transpose(img[0].cpu().numpy(), (1,2,0))
    #         img_denorm = denorm(image=img_np)['image']
    #         img_ndarray = (img_denorm*255).astype(np.uint8)
    #         seg_target = data['gt_masks'].squeeze(0)
    #         tensor_embedding = data['lang_tokens'][:,:]
    #         sentences = tokenizer.decode(tensor_embedding[0], skip_special_tokens=True)
    #         # tokens = [ds.tokenizer.decode([w], skip_special_tokens=False) for w in tensor_embedding[0]]
    #         # tokens = [x for x in tokens if x!='[PAD]']
            
    #         fpath = os.path.join(dirname, os.path.basename(data["file_name"]))
    #         fig = plt.figure(figsize=(10,6))
    #         ax1 = fig.add_subplot(1,2,1)
    #         ax1.imshow(img_ndarray)
    #         ax1.set_xlabel("Mosaic Image")
    #         ax2 = fig.add_subplot(1,2,2)
    #         ax2.imshow(seg_target)
    #         ax2.set_xlabel("Segmentation Map")
    #         plt.suptitle(sentences)
    #         plt.tight_layout()
    #         plt.savefig(fpath)
            
    # else :
        
    #     for i in range(n_sample):
    #         d = batch[i]
    #         img = np.array(Image.open(d["file_name"]))
    #         visualizer = Visualizer(img, metadata={})
    #         vis = visualizer.draw_dataset_dict(d)
    #         fpath = os.path.join(dirname, os.path.basename(d["file_name"]))
    #         vis.save(fpath)


def MosaicVisualization(dataloader, dirname="coco-aug-data-vis", n_sample=4):

    mean = (0.485, 0.456, 0.406)
    std = (0.229, 0.224, 0.225)
    denorm = A.Normalize(
        mean=[-m / s for m, s in zip(mean, std)],
        std=[1.0 / s for s in std],
        max_pixel_value=1.0
    )
    tokenizer = BertTokenizer.from_pretrained("bert-base-uncased")

    os.makedirs(dirname, exist_ok=True)
    # dataloader = build_detection_train_loader(cfg, mapper=mapper)
    it = iter(dataloader)
    while(n_sample):
        try :
            data = next(it)
            # n_sample = random.randint(1, len(batch))
            # if 'seg_target' in batch[0].keys():
            #     for i in range(n_sample):
            # data = batch[i]
            img = data['image']
            img_np = np.transpose(img.cpu().numpy(), (1,2,0))
            img_denorm = denorm(image=img_np)['image']
            img_ndarray = (img_denorm*255).astype(np.uint8)
            seg_target = data['seg_target']
            tensor_embedding = data['sentence'].reshape(-1).cpu().numpy()
            sentences = tokenizer.decode(tensor_embedding, skip_special_tokens=True)
            # tokens = [ds.tokenizer.decode([w], skip_special_tokens=False) for w in tensor_embedding[0]]
            # tokens = [x for x in tokens if x!='[PAD]']
            
            fpath = os.path.join(dirname, f'sample_{n_sample}.jpg')
            fig = plt.figure(figsize=(10,6))
            ax1 = fig.add_subplot(1,2,1)
            ax1.imshow(img_ndarray)
            ax1.set_xlabel("Mosaic Image")
            ax2 = fig.add_subplot(1,2,2)
            ax2.imshow(seg_target)
            ax2.set_xlabel("Segmentation Map")
            plt.suptitle(sentences)
            plt.tight_layout()
            plt.savefig(fpath)
            n_sample -= 1
        except :
            break
            
    # else :
        
    #     for i in range(n_sample):
    #         d = batch[i]
    #         img = np.array(Image.open(d["file_name"]))
    #         visualizer = Visualizer(img, metadata={})
    #         vis = visualizer.draw_dataset_dict(d)
    #         fpath = os.path.join(dirname, os.path.basename(d["file_name"]))
    #         vis.save(fpath)