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| # Licensed under the Apache License, Version 2.0 (the "License"); | |
| # you may not use this file except in compliance with the License. | |
| # You may obtain a copy of the License at | |
| # | |
| # http://www.apache.org/licenses/LICENSE-2.0 | |
| # | |
| # Unless required by applicable law or agreed to in writing, software | |
| # distributed under the License is distributed on an "AS IS" BASIS, | |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| # See the License for the specific language governing permissions and | |
| # limitations under the License. | |
| # | |
| import os | |
| import PIL | |
| from PIL import ImageDraw | |
| def save_results(image_list, results, labels, output_dir='output/', threshold=0.5): | |
| if not os.path.exists(output_dir): | |
| os.makedirs(output_dir) | |
| for idx, im in enumerate(image_list): | |
| im = draw_box(im, results[idx], labels, threshold=threshold) | |
| out_path = os.path.join(output_dir, f"{idx}.jpg") | |
| im.save(out_path, quality=95) | |
| print("save result to: " + out_path) | |
| def draw_box(im, result, lables, threshold=0.5): | |
| draw_thickness = min(im.size) // 320 | |
| draw = ImageDraw.Draw(im) | |
| color_list = get_color_map_list(len(lables)) | |
| clsid2color = {n.lower():color_list[i] for i,n in enumerate(lables)} | |
| result = [r for r in result if r["score"] >= threshold] | |
| for dt in result: | |
| color = tuple(clsid2color[dt["type"]]) | |
| xmin, ymin, xmax, ymax = dt["bbox"] | |
| draw.line( | |
| [(xmin, ymin), (xmin, ymax), (xmax, ymax), (xmax, ymin), | |
| (xmin, ymin)], | |
| width=draw_thickness, | |
| fill=color) | |
| # draw label | |
| text = "{} {:.4f}".format(dt["type"], dt["score"]) | |
| tw, th = imagedraw_textsize_c(draw, text) | |
| draw.rectangle( | |
| [(xmin + 1, ymin - th), (xmin + tw + 1, ymin)], fill=color) | |
| draw.text((xmin + 1, ymin - th), text, fill=(255, 255, 255)) | |
| return im | |
| def get_color_map_list(num_classes): | |
| """ | |
| Args: | |
| num_classes (int): number of class | |
| Returns: | |
| color_map (list): RGB color list | |
| """ | |
| color_map = num_classes * [0, 0, 0] | |
| for i in range(0, num_classes): | |
| j = 0 | |
| lab = i | |
| while lab: | |
| color_map[i * 3] |= (((lab >> 0) & 1) << (7 - j)) | |
| color_map[i * 3 + 1] |= (((lab >> 1) & 1) << (7 - j)) | |
| color_map[i * 3 + 2] |= (((lab >> 2) & 1) << (7 - j)) | |
| j += 1 | |
| lab >>= 3 | |
| color_map = [color_map[i:i + 3] for i in range(0, len(color_map), 3)] | |
| return color_map | |
| def imagedraw_textsize_c(draw, text): | |
| if int(PIL.__version__.split('.')[0]) < 10: | |
| tw, th = draw.textsize(text) | |
| else: | |
| left, top, right, bottom = draw.textbbox((0, 0), text) | |
| tw, th = right - left, bottom - top | |
| return tw, th | |