Ethanfel
06b42a610b
Replace per-pixel Python loop with vectorized torch.arange + slice operations. Fix DifferentialDiffusion node position to avoid visual overlap with SplitImageToTileList node 14 on the canvas. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
96 lines
4.6 KiB
Python
96 lines
4.6 KiB
Python
import torch
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class GenerateSeamMask:
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@classmethod
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def INPUT_TYPES(cls):
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return {
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"required": {
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"image_width": ("INT", {"default": 2048, "min": 64, "max": 16384, "step": 1,
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"tooltip": "Width of the image (from GetImageSize)."}),
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"image_height": ("INT", {"default": 2048, "min": 64, "max": 16384, "step": 1,
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"tooltip": "Height of the image (from GetImageSize)."}),
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"tile_width": ("INT", {"default": 1024, "min": 64, "max": 8192, "step": 8,
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"tooltip": "Tile width used in the main tiled redraw pass."}),
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"tile_height": ("INT", {"default": 1024, "min": 64, "max": 8192, "step": 8,
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"tooltip": "Tile height used in the main tiled redraw pass."}),
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"overlap": ("INT", {"default": 128, "min": 0, "max": 4096, "step": 1,
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"tooltip": "Overlap used in the main tiled redraw pass."}),
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"seam_width": ("INT", {"default": 64, "min": 8, "max": 512, "step": 8,
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"tooltip": "Width of the seam bands to fix (in pixels)."}),
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"mode": (["binary", "gradient"], {"default": "binary",
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"tooltip": "binary: hard 0/1 mask. gradient: linear falloff for use with Differential Diffusion."}),
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}
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}
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RETURN_TYPES = ("IMAGE",)
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FUNCTION = "generate"
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CATEGORY = "image/upscaling"
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DESCRIPTION = "Generates a mask image with white bands at tile seam positions. Used for targeted seam fix denoising."
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@staticmethod
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def _get_tile_positions(length, tile_size, overlap):
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"""Compute 1D tile start/end positions, matching SplitImageToTileList's get_grid_coords."""
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stride = max(1, tile_size - overlap)
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positions = []
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p = 0
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while p < length:
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p_end = min(p + tile_size, length)
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p_start = max(0, p_end - tile_size)
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positions.append((p_start, p_end))
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if p_end >= length:
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break
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p += stride
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return positions
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def generate(self, image_width, image_height, tile_width, tile_height, overlap, seam_width, mode="binary"):
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mask = torch.zeros(1, image_height, image_width, 3)
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half_w = seam_width // 2
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# Compute actual tile grids (same logic as SplitImageToTileList)
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x_tiles = self._get_tile_positions(image_width, tile_width, overlap)
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y_tiles = self._get_tile_positions(image_height, tile_height, overlap)
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if mode == "gradient":
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# Build 1D linear ramps for each seam, then take max across all bands
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# Vertical seam bands
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for i in range(len(x_tiles) - 1):
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ovl_start = max(x_tiles[i][0], x_tiles[i + 1][0])
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ovl_end = min(x_tiles[i][1], x_tiles[i + 1][1])
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center = (ovl_start + ovl_end) // 2
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x_start = max(0, center - half_w)
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x_end = min(image_width, center + half_w)
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xs = torch.arange(x_start, x_end, dtype=torch.float32)
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vals = (1.0 - (xs - center).abs() / half_w).view(1, 1, -1, 1)
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mask[:, :, x_start:x_end, :] = torch.max(mask[:, :, x_start:x_end, :], vals)
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# Horizontal seam bands
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for i in range(len(y_tiles) - 1):
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ovl_start = max(y_tiles[i][0], y_tiles[i + 1][0])
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ovl_end = min(y_tiles[i][1], y_tiles[i + 1][1])
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center = (ovl_start + ovl_end) // 2
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y_start = max(0, center - half_w)
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y_end = min(image_height, center + half_w)
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ys = torch.arange(y_start, y_end, dtype=torch.float32)
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vals = (1.0 - (ys - center).abs() / half_w).view(1, -1, 1, 1)
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mask[:, y_start:y_end, :, :] = torch.max(mask[:, y_start:y_end, :, :], vals)
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else:
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# Binary mode (original behavior)
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for i in range(len(x_tiles) - 1):
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ovl_start = max(x_tiles[i][0], x_tiles[i + 1][0])
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ovl_end = min(x_tiles[i][1], x_tiles[i + 1][1])
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center = (ovl_start + ovl_end) // 2
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x_start = max(0, center - half_w)
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x_end = min(image_width, center + half_w)
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mask[:, :, x_start:x_end, :] = 1.0
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for i in range(len(y_tiles) - 1):
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ovl_start = max(y_tiles[i][0], y_tiles[i + 1][0])
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ovl_end = min(y_tiles[i][1], y_tiles[i + 1][1])
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center = (ovl_start + ovl_end) // 2
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y_start = max(0, center - half_w)
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y_end = min(image_height, center + half_w)
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mask[:, y_start:y_end, :, :] = 1.0
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return (mask,)
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