feat(api): add stage for local standard deviation denoising for XL

api/onnx_web/chain/blend_denoise_fastnlmeans.py

@@ -13,7 +13,7 @@ from .result import StageResult
 logger = getLogger(__name__)
 
 
-class BlendDenoiseStage(BaseStage):
+class BlendDenoiseFastNLMeansStage(BaseStage):
     max_tile = SizeChart.max
 
     def run(

api/onnx_web/chain/blend_denoise_localstd.py

@@ -0,0 +1,113 @@
+from logging import getLogger
+from typing import Optional
+
+import numpy as np
+from PIL import Image
+
+from ..params import ImageParams, SizeChart, StageParams
+from ..server import ServerContext
+from ..worker import ProgressCallback, WorkerContext
+from .base import BaseStage
+from .result import StageResult
+
+logger = getLogger(__name__)
+
+
+class BlendDenoiseLocalStdStage(BaseStage):
+    max_tile = SizeChart.max
+
+    def run(
+        self,
+        _worker: WorkerContext,
+        _server: ServerContext,
+        _stage: StageParams,
+        _params: ImageParams,
+        sources: StageResult,
+        *,
+        strength: int = 3,
+        stage_source: Optional[Image.Image] = None,
+        callback: Optional[ProgressCallback] = None,
+        **kwargs,
+    ) -> StageResult:
+        logger.info("denoising source images")
+
+        results = []
+        for source in sources.as_numpy():
+            results.append(remove_noise(source))
+
+        return StageResult(arrays=results)
+
+
+def downscale_image(image):
+    result_image = np.zeros((image.shape[0] // 2, image.shape[1] // 2), dtype=np.uint8)
+
+    for i in range(0, image.shape[0] - 1, 2):
+        for j in range(0, image.shape[1] - 1, 2):
+            # Average the four neighboring pixels
+            pixel_average = np.mean(image[i : i + 2, j : j + 2], axis=(0, 1))
+            result_image[i // 2, j // 2] = pixel_average.astype(np.uint8)
+
+    return result_image
+
+
+def replace_noise(region, threshold):
+    # Identify stray pixels (brightness significantly deviates from surrounding pixels)
+    central_pixel = region[1, 1]
+
+    region_median = np.median(region)
+    region_deviation = np.std(region)
+    diff = np.abs(central_pixel - region_median)
+
+    # If the whole region is fairly consistent but the central pixel deviates significantly,
+    if diff > region_deviation and diff > threshold:
+        surrounding_pixels = region[region != central_pixel]
+        surrounding_median = np.median(surrounding_pixels)
+        # replace it with the median of surrounding pixels
+        region[1, 1] = surrounding_median
+        return True
+
+    return False
+
+
+def remove_noise(image, region_size=(6, 6), threshold=10):
+    # Assuming 'image' is a 3D numpy array representing the RGB image
+
+    # Create a copy of the original image to store the result
+    result_image = np.copy(image)
+    # result_mask = np.ones_like(image) * 255
+
+    # Iterate over regions in each channel
+    i_inc = region_size[0] // 2
+    j_inc = region_size[1] // 2
+
+    for i in range(i_inc, image.shape[0] - i_inc, 1):
+        for j in range(j_inc, image.shape[1] - j_inc, 1):
+            i_min = i - (region_size[0] // 2)
+            i_max = i + (region_size[0] // 2)
+            j_min = j - (region_size[1] // 2)
+            j_max = j + (region_size[1] // 2)
+
+            # Extract region from each channel
+            region_red = downscale_image(image[i_min:i_max, j_min:j_max, 0])
+            region_green = downscale_image(image[i_min:i_max, j_min:j_max, 1])
+            region_blue = downscale_image(image[i_min:i_max, j_min:j_max, 2])
+
+            replaced = any(
+                [
+                    replace_noise(region_red, threshold),
+                    replace_noise(region_green, threshold),
+                ]
+            )
+
+            # Apply the noise removal function to each channel
+            if replaced:
+                # Assign the processed region back to the result image
+                result_image[i - 1 : i + 1, j - 1 : j + 1, 0] = region_red[1, 1]
+                result_image[i - 1 : i + 1, j - 1 : j + 1, 1] = region_green[1, 1]
+                result_image[i - 1 : i + 1, j - 1 : j + 1, 2] = region_blue[1, 1]
+
+                # result_mask[i-1:i+1, j-1:j+1, 0] = 0
+                # result_mask[i-1:i+1, j-1:j+1, 1] = 0
+                # result_mask[i-1:i+1, j-1:j+1, 2] = 0
+
+    return result_image  # , result_mask)

api/onnx_web/chain/stages.py

@@ -1,7 +1,8 @@
 from logging import getLogger
 
 from .base import BaseStage
-from .blend_denoise import BlendDenoiseStage
+from .blend_denoise_fastnlmeans import BlendDenoiseFastNLMeansStage
+from .blend_denoise_localstd import BlendDenoiseLocalStdStage
 from .blend_grid import BlendGridStage
 from .blend_img2img import BlendImg2ImgStage
 from .blend_linear import BlendLinearStage
@@ -27,7 +28,9 @@ from .upscale_swinir import UpscaleSwinIRStage
 logger = getLogger(__name__)
 
 CHAIN_STAGES = {
-    "blend-denoise": BlendDenoiseStage,
+    "blend-denoise": BlendDenoiseFastNLMeansStage,
+    "blend-denoise-fastnlmeans": BlendDenoiseFastNLMeansStage,
+    "blend-denoise-localstd": BlendDenoiseLocalStdStage,
     "blend-img2img": BlendImg2ImgStage,
     "blend-inpaint": UpscaleOutpaintStage,
     "blend-grid": BlendGridStage,

api/onnx_web/diffusers/run.py

@@ -5,7 +5,7 @@ from typing import Any, List, Optional
 from PIL import Image, ImageOps
 
 from ..chain import (
-    BlendDenoiseStage,
+    BlendDenoiseLocalStdStage,
     BlendImg2ImgStage,
     BlendMaskStage,
     ChainPipeline,
@@ -78,9 +78,9 @@ def run_txt2img_pipeline(
 
     # apply upscaling and correction, before highres
     highres_size = get_highres_tile(server, params, highres, tile_size)
-    if params.is_panorama():
+    if params.is_xl():
         chain.stage(
-            BlendDenoiseStage(),
+            BlendDenoiseLocalStdStage(),
             StageParams(tile_size=highres_size),
         )