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app.py
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import gradio as gr
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import torch
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import random
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import numpy as np
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from transformers import MaskFormerFeatureExtractor, MaskFormerForInstanceSegmentation
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device = torch.device("cpu")
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model = MaskFormerForInstanceSegmentation.from_pretrained("facebook/maskformer-swin-tiny-ade").to(device)
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model.eval()
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preprocessor = MaskFormerFeatureExtractor.from_pretrained("facebook/maskformer-swin-tiny-ade")
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def visualize_instance_seg_mask(mask):
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image = np.zeros((mask.shape[0], mask.shape[1], 3))
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labels = np.unique(mask)
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label2color = {label: (random.randint(0, 1), random.randint(0, 255), random.randint(0, 255)) for label in labels}
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for i in range(image.shape[0]):
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for j in range(image.shape[1]):
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image[i, j, :] = label2color[mask[i, j]]
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image = image / 255
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return image
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def query_image(img):
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target_size = (img.shape[0], img.shape[1])
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inputs = preprocessor(images=img, return_tensors="pt")
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with torch.no_grad():
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outputs = model(**inputs)
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outputs.class_queries_logits = outputs.class_queries_logits.cpu()
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outputs.masks_queries_logits = outputs.masks_queries_logits.cpu()
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results = preprocessor.post_process_segmentation(outputs=outputs, target_size=target_size)[0].cpu().detach()
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results = torch.argmax(results, dim=0).numpy()
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results = visualize_instance_seg_mask(results)
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return results
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demo = gr.Interface(
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query_image,
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inputs=[gr.Image()],
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outputs="image",
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title="MaskFormer Demo",
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examples=[["example_2.png"]]
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)
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demo.launch()
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