Fixing truss files for real esrgan

real-esrgan/README.md

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+# Real-ESRGAN Truss
+
+This is a [Truss](https://truss.baseten.co/) for Real-ESRGAN which is an AI image upscaling model.
+Open-source image generation models like Stable Diffusion 1.5 can sometime produce blurry or low resolution images. Using Real-ESRGAN, those low quality images can be upscaled making them look sharper and more detailed.
+
+## Deployment
+
+First, clone this repository:
+
+```
+git clone https://github.com/basetenlabs/truss-examples/
+cd real-esrgan-truss
+```
+
+Before deployment:
+
+1. Make sure you have a [Baseten account](https://app.baseten.co/signup) and [API key](https://app.baseten.co/settings/account/api_keys).
+2. Install the latest version of Truss: `pip install --upgrade truss`
+
+With `real-esrgan-truss` as your working directory, you can deploy the model with:
+
+```
+truss push
+```
+
+Paste your Baseten API key if prompted.
+
+For more information, see [Truss documentation](https://truss.baseten.co).
+
+## API route: `predict`
+The predict route is the primary method for upscaling an image. In order to send the image to our model, the image must first be converted into a base64 string.
+
+- __image__: The image converted to a base64 string
+
+
+## Invoking the model
+
+```sh
+truss predict -d '{"image": "<BASE64-STRING-HERE>"}'
+```
+
+You can also use python to call the model:
+
+```python
+BASE64_PREAMBLE = "data:image/png;base64,"
+
+def pil_to_b64(pil_img):
+    buffered = BytesIO()
+    pil_img.save(buffered, format="PNG")
+    img_str = base64.b64encode(buffered.getvalue()).decode("utf-8")
+    return img_str
+
+def b64_to_pil(b64_str):
+    return Image.open(BytesIO(base64.b64decode(b64_str.replace(BASE64_PREAMBLE, ""))))
+
+img = Image.open("/path/to/image/ship.jpeg")
+b64_img = pil_to_b64(img)
+
+headers = {"Authorization": f"Api-Key <BASETEN-API-KEY>"}
+data = {"image": b64_img}
+res = requests.post("https://model-{MODEL_ID}.api.baseten.co/development/predict", headers=headers, json=data)
+output = res.json()
+
+result_b64 = output.get("model_output").get("upscaled_image")
+pil_img = b64_to_pil(result_b64)
+pil_img.save("upscaled_output_img.png")
+```
+
+The model returns a JSON object containing the key `upscaled_image`, which is the upscaled image as a base64 string.
+
+## Results
+
+<div style="display: flex; justify-content: space-between;">
+    <div style="flex: 1; margin-right: 10px;">
+        <img src="ship.jpeg" alt="original image" style="width: 100%;">
+        <p>Original Image Stable Diffusion 1.5</p>
+    </div>
+    <div style="flex: 1;">
+        <img src="result_image.jpeg" alt="upscaled image" style="width: 100%;">
+        <p>Upscaled Image</p>
+    </div>
+</div>
+
+<div style="display: flex; justify-content: space-between;">
+    <div style="flex: 1; margin-right: 10px;">
+        <img src="racecar.jpeg" alt="original image" style="width: 100%;">
+        <p>Original Image SDXL</p>
+    </div>
+    <div style="flex: 1;">
+        <img src="racecar_upscaled.jpeg" alt="upscaled image" style="width: 100%;">
+        <p>Upscaled Image</p>
+    </div>
+</div>

real-esrgan/config.yaml

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+environment_variables: {}
+external_package_dirs: []
+model_metadata:
+  example_model_input: {"image": "BASE64-STRING-HERE"}
+  pretty_name: Real ESRGAN
+model_name: Real ESRGAN
+python_version: py310
+requirements:
+  - git+https://github.com/xinntao/Real-ESRGAN.git@5ca1078535923d485892caee7d7804380bfc87fd
+  - numpy==1.23.5
+  - torch==2.0.1
+  - torchvision==0.15.2
+  - facexlib==0.3.0
+  - gfpgan==1.3.8
+  - basicsr==1.4.2
+  - opencv-python==4.8.0.76
+  - opencv-python-headless==4.8.1.78
+  - Pillow==9.4.0
+  - tqdm==4.66.1
+resources:
+  cpu: "3"
+  memory: 14Gi
+  use_gpu: true
+  accelerator: T4
+system_packages:
+  - libgl1-mesa-glx
+  - libglib2.0-0
+external_data:
+  - url: https://github.com/xinntao/Real-ESRGAN/releases/download/v0.1.0/RealESRGAN_x4plus.pth
+    local_data_path: weights/RealESRGAN_x4plus.pth

real-esrgan/model/model.py

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+import base64
+import io
+import os
+from io import BytesIO
+from typing import Dict
+
+import numpy as np
+from basicsr.archs.rrdbnet_arch import RRDBNet
+from PIL import Image
+from realesrgan import RealESRGANer
+
+original_working_directory = os.getcwd()
+
+
+class Model:
+    def __init__(self, **kwargs):
+        self._data_dir = kwargs["data_dir"]
+        self.model_checkpoint_path = os.path.join(
+            original_working_directory,
+            self._data_dir,
+            "weights",
+            "RealESRGAN_x4plus.pth",
+        )
+        self.model = None
+
+    def pil_to_b64(self, pil_img):
+        buffered = BytesIO()
+        pil_img.save(buffered, format="PNG")
+        img_str = base64.b64encode(buffered.getvalue()).decode("utf-8")
+        return img_str
+
+    def load(self):
+        rrdb_net_model = RRDBNet(
+            num_in_ch=3,
+            num_out_ch=3,
+            num_feat=64,
+            num_block=23,
+            num_grow_ch=32,
+            scale=4,
+        )
+        netscale = 4
+
+        self.model = RealESRGANer(
+            scale=netscale,
+            model_path=self.model_checkpoint_path,
+            model=rrdb_net_model,
+            tile=0,
+            tile_pad=10,
+            pre_pad=0,
+            half=True,
+        )
+
+    def predict(self, request: Dict) -> Dict:
+        image = request.get("image")
+        scale = 4
+
+        pil_img = Image.open(io.BytesIO(base64.decodebytes(bytes(image, "utf-8"))))
+        pil_image_array = np.asarray(pil_img)
+
+        output, _ = self.model.enhance(pil_image_array, outscale=scale)
+        output = Image.fromarray(output)
+        output_b64 = self.pil_to_b64(output)
+        return {"upscaled_image": output_b64}