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| from PIL import Image, ImageFont, ImageDraw | |
| import random | |
| # resize height to image_height first, then shrink or pad to image_width | |
| def resize_and_pad_image(pil_image, image_size): | |
| if isinstance(image_size, (tuple, list)) and len(image_size) == 2: | |
| image_width, image_height = image_size | |
| elif isinstance(image_size, int): | |
| image_width = image_height = image_size | |
| else: | |
| raise ValueError(f"Image size should be int or list/tuple of int not {image_size}") | |
| while pil_image.size[1] >= 2 * image_height: | |
| pil_image = pil_image.resize( | |
| tuple(x // 2 for x in pil_image.size), resample=Image.BOX | |
| ) | |
| scale = image_height / pil_image.size[1] | |
| pil_image = pil_image.resize(tuple(round(x * scale) for x in pil_image.size),resample=Image.BICUBIC) | |
| # shrink | |
| if pil_image.size[0] > image_width: | |
| pil_image = pil_image.resize((image_width, image_height),resample=Image.BICUBIC) | |
| # padding | |
| if pil_image.size[0] < image_width: | |
| img = Image.new(mode="RGB",size=(image_width,image_height), color="white") | |
| width, _ = pil_image.size | |
| img.paste(pil_image,((image_width - width)//2, 0)) | |
| pil_image = img | |
| return pil_image | |
| def render_text_image_custom(image_size, bboxes, rendered_txt_values, num_rows_values, align = "center"): | |
| # aligns = ["center", "left", "right"] | |
| """Render text image based on the list of bbox called `bboxes`. | |
| Support font that can be choosed. | |
| """ | |
| print(image_size, bboxes, rendered_txt_values, num_rows_values, align) | |
| background = Image.new("RGB", image_size, "white") | |
| font = ImageFont.truetype("calibri.ttf", encoding='utf-8', size=512) | |
| for text, bbox, num_rows in zip(rendered_txt_values, bboxes, num_rows_values): | |
| if len(text) == 0: | |
| continue | |
| text = text.strip() | |
| if num_rows != 1: | |
| word_tokens = text.split() | |
| num_tokens = len(word_tokens) | |
| index_list = range(1, num_tokens + 1) | |
| if num_tokens > num_rows: | |
| index_list = random.sample(index_list, num_rows) | |
| index_list.sort() | |
| line_list = [] | |
| start_idx = 0 | |
| for index in index_list: | |
| line_list.append( | |
| " ".join(word_tokens | |
| [start_idx: index] | |
| ) | |
| ) | |
| start_idx = index | |
| text = "\n".join(line_list) | |
| if 'ratio' not in bbox or bbox['ratio'] == 0 or bbox['ratio'] < 1e-4: | |
| image4ratio = Image.new("RGB", (512, 512), "white") | |
| draw = ImageDraw.Draw(image4ratio) | |
| _, _ , w, h = draw.textbbox(xy=(0,0),text = text, font=font) | |
| ratio = w / h | |
| else: | |
| ratio = bbox['ratio'] | |
| width = int(bbox['width'] * image_size[1]) | |
| height = int(width / ratio) | |
| top_left_x = int(bbox['top_left_x'] * image_size[0]) | |
| top_left_y = int(bbox['top_left_y'] * image_size[1]) | |
| yaw = bbox['yaw'] | |
| text_image = Image.new("RGB", (512, 512), "white") | |
| draw = ImageDraw.Draw(text_image) | |
| x,y,w,h = draw.textbbox(xy=(0,0),text = text, font=font) | |
| text_image = Image.new("RGB", (w, h), "white") | |
| draw = ImageDraw.Draw(text_image) | |
| draw.text((-x/2,-y/2), text, "black", font=font, align=align) | |
| text_image = resize_and_pad_image(text_image, (width, height)) | |
| text_image = text_image.rotate(angle=-yaw, expand=True, fillcolor="white") | |
| # image = Image.new("RGB", (w, h), "white") | |
| # draw = ImageDraw.Draw(image) | |
| background.paste(text_image, (top_left_x, top_left_y)) | |
| return background | |