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| """ | |
| Some preprocessing utilities have been taken from: | |
| https://github.com/google-research/maxim/blob/main/maxim/run_eval.py | |
| """ | |
| import gradio as gr | |
| import numpy as np | |
| import tensorflow as tf | |
| from huggingface_hub.keras_mixin import from_pretrained_keras | |
| from PIL import Image | |
| from create_maxim_model import Model | |
| from maxim.configs import MAXIM_CONFIGS | |
| CKPT = "google/maxim-s2-dehazing-sots-outdoor" | |
| VARIANT = CKPT.split("/")[-1].split("-")[1] | |
| VARIANT = VARIANT[0].upper() + "-" + VARIANT[1] | |
| _MODEL = from_pretrained_keras(CKPT) | |
| def mod_padding_symmetric(image, factor=64): | |
| """Padding the image to be divided by factor.""" | |
| height, width = image.shape[0], image.shape[1] | |
| height_pad, width_pad = ((height + factor) // factor) * factor, ( | |
| (width + factor) // factor | |
| ) * factor | |
| padh = height_pad - height if height % factor != 0 else 0 | |
| padw = width_pad - width if width % factor != 0 else 0 | |
| image = tf.pad( | |
| image, [(padh // 2, padh // 2), (padw // 2, padw // 2), (0, 0)], mode="REFLECT" | |
| ) | |
| return image | |
| def make_shape_even(image): | |
| """Pad the image to have even shapes.""" | |
| height, width = image.shape[0], image.shape[1] | |
| padh = 1 if height % 2 != 0 else 0 | |
| padw = 1 if width % 2 != 0 else 0 | |
| image = tf.pad(image, [(0, padh), (0, padw), (0, 0)], mode="REFLECT") | |
| return image | |
| def process_image(image: Image): | |
| input_img = np.asarray(image) / 255.0 | |
| height, width = input_img.shape[0], input_img.shape[1] | |
| # Padding images to have even shapes | |
| input_img = make_shape_even(input_img) | |
| height_even, width_even = input_img.shape[0], input_img.shape[1] | |
| # padding images to be multiplies of 64 | |
| input_img = mod_padding_symmetric(input_img, factor=64) | |
| input_img = tf.expand_dims(input_img, axis=0) | |
| return input_img, height, width, height_even, width_even | |
| def init_new_model(input_img): | |
| configs = MAXIM_CONFIGS.get(VARIANT) | |
| configs.update( | |
| { | |
| "variant": VARIANT, | |
| "dropout_rate": 0.0, | |
| "num_outputs": 3, | |
| "use_bias": True, | |
| "num_supervision_scales": 3, | |
| } | |
| ) | |
| configs.update({"input_resolution": (input_img.shape[1], input_img.shape[2])}) | |
| new_model = Model(**configs) | |
| new_model.set_weights(_MODEL.get_weights()) | |
| return new_model | |
| def infer(image): | |
| preprocessed_image, height, width, height_even, width_even = process_image(image) | |
| new_model = init_new_model(preprocessed_image) | |
| preds = new_model.predict(preprocessed_image) | |
| if isinstance(preds, list): | |
| preds = preds[-1] | |
| if isinstance(preds, list): | |
| preds = preds[-1] | |
| preds = np.array(preds[0], np.float32) | |
| new_height, new_width = preds.shape[0], preds.shape[1] | |
| h_start = new_height // 2 - height_even // 2 | |
| h_end = h_start + height | |
| w_start = new_width // 2 - width_even // 2 | |
| w_end = w_start + width | |
| preds = preds[h_start:h_end, w_start:w_end, :] | |
| return Image.fromarray(np.array((np.clip(preds, 0.0, 1.0) * 255.0).astype(np.uint8))) | |
| title = "Dehaze hazy images." | |
| description = f"The underlying model is [this](https://huggingface.co/{CKPT}). You can use the model to dehaze hazy images. There is [another version of the model](https://hf.co/google/maxim-s2-dehazing-sots-indoor) (better suited for indoor images) you can try out. To quickly try out the model, you can choose from the available sample images below, or you can submit your own image. Not that, internally, the model is re-initialized based on the spatial dimensions of the input image and this process is time-consuming." | |
| iface = gr.Interface( | |
| infer, | |
| inputs="image", | |
| outputs=gr.Image().style(height=242), | |
| title=title, | |
| description=description, | |
| allow_flagging="never", | |
| examples=[ | |
| ["1444_10.png"], | |
| ["0003_0.8_0.2.png"], | |
| ["0048_0.9_0.2.png"], | |
| ["0010_0.95_0.16.png"], | |
| ["0014_0.8_0.12.png"], | |
| ["1440_10.png"], | |
| ], | |
| ) | |
| iface.launch(debug=True) | |