diff --git a/invokeai/app/invocations/spandrel_image_to_image.py b/invokeai/app/invocations/spandrel_image_to_image.py index 76cf31480c1..bbe31af6448 100644 --- a/invokeai/app/invocations/spandrel_image_to_image.py +++ b/invokeai/app/invocations/spandrel_image_to_image.py @@ -1,4 +1,7 @@ +import numpy as np import torch +from PIL import Image +from tqdm import tqdm from invokeai.app.invocations.baseinvocation import BaseInvocation, invocation from invokeai.app.invocations.fields import ( @@ -11,11 +14,14 @@ ) from invokeai.app.invocations.model import ModelIdentifierField from invokeai.app.invocations.primitives import ImageOutput +from invokeai.app.services.session_processor.session_processor_common import CanceledException from invokeai.app.services.shared.invocation_context import InvocationContext from invokeai.backend.spandrel_image_to_image_model import SpandrelImageToImageModel +from invokeai.backend.tiles.tiles import calc_tiles_min_overlap +from invokeai.backend.tiles.utils import TBLR, Tile -@invocation("spandrel_image_to_image", title="Image-to-Image", tags=["upscale"], category="upscale", version="1.0.0") +@invocation("spandrel_image_to_image", title="Image-to-Image", tags=["upscale"], category="upscale", version="1.1.0") class SpandrelImageToImageInvocation(BaseInvocation, WithMetadata, WithBoard): """Run any spandrel image-to-image model (https://github.com/chaiNNer-org/spandrel).""" @@ -25,25 +31,114 @@ class SpandrelImageToImageInvocation(BaseInvocation, WithMetadata, WithBoard): description=FieldDescriptions.spandrel_image_to_image_model, ui_type=UIType.SpandrelImageToImageModel, ) + tile_size: int = InputField( + default=512, description="The tile size for tiled image-to-image. Set to 0 to disable tiling." + ) + + def _scale_tile(self, tile: Tile, scale: int) -> Tile: + return Tile( + coords=TBLR( + top=tile.coords.top * scale, + bottom=tile.coords.bottom * scale, + left=tile.coords.left * scale, + right=tile.coords.right * scale, + ), + overlap=TBLR( + top=tile.overlap.top * scale, + bottom=tile.overlap.bottom * scale, + left=tile.overlap.left * scale, + right=tile.overlap.right * scale, + ), + ) @torch.inference_mode() def invoke(self, context: InvocationContext) -> ImageOutput: - image = context.images.get_pil(self.image.image_name) + # Images are converted to RGB, because most models don't support an alpha channel. In the future, we may want to + # revisit this. + image = context.images.get_pil(self.image.image_name, mode="RGB") + + # Compute the image tiles. + if self.tile_size > 0: + min_overlap = 20 + tiles = calc_tiles_min_overlap( + image_height=image.height, + image_width=image.width, + tile_height=self.tile_size, + tile_width=self.tile_size, + min_overlap=min_overlap, + ) + else: + # No tiling. Generate a single tile that covers the entire image. + min_overlap = 0 + tiles = [ + Tile( + coords=TBLR(top=0, bottom=image.height, left=0, right=image.width), + overlap=TBLR(top=0, bottom=0, left=0, right=0), + ) + ] + + # Sort tiles first by left x coordinate, then by top y coordinate. During tile processing, we want to iterate + # over tiles left-to-right, top-to-bottom. + tiles = sorted(tiles, key=lambda x: x.coords.left) + tiles = sorted(tiles, key=lambda x: x.coords.top) + + # Prepare input image for inference. + image_tensor = SpandrelImageToImageModel.pil_to_tensor(image) # Load the model. spandrel_model_info = context.models.load(self.image_to_image_model) + # Run the model on each tile. with spandrel_model_info as spandrel_model: assert isinstance(spandrel_model, SpandrelImageToImageModel) - # Prepare input image for inference. - image_tensor = SpandrelImageToImageModel.pil_to_tensor(image) + # Scale the tiles for re-assembling the final image. + scale = spandrel_model.scale + scaled_tiles = [self._scale_tile(tile, scale=scale) for tile in tiles] + + # Prepare the output tensor. + _, channels, height, width = image_tensor.shape + output_tensor = torch.zeros( + (height * scale, width * scale, channels), dtype=torch.uint8, device=torch.device("cpu") + ) + image_tensor = image_tensor.to(device=spandrel_model.device, dtype=spandrel_model.dtype) - # Run inference. - image_tensor = spandrel_model.run(image_tensor) + for tile, scaled_tile in tqdm(list(zip(tiles, scaled_tiles, strict=True)), desc="Upscaling Tiles"): + # Exit early if the invocation has been canceled. + if context.util.is_canceled(): + raise CanceledException + + # Extract the current tile from the input tensor. + input_tile = image_tensor[ + :, :, tile.coords.top : tile.coords.bottom, tile.coords.left : tile.coords.right + ].to(device=spandrel_model.device, dtype=spandrel_model.dtype) + + # Run the model on the tile. + output_tile = spandrel_model.run(input_tile) + + # Convert the output tile into the output tensor's format. + # (N, C, H, W) -> (C, H, W) + output_tile = output_tile.squeeze(0) + # (C, H, W) -> (H, W, C) + output_tile = output_tile.permute(1, 2, 0) + output_tile = output_tile.clamp(0, 1) + output_tile = (output_tile * 255).to(dtype=torch.uint8, device=torch.device("cpu")) + + # Merge the output tile into the output tensor. + # We only keep half of the overlap on the top and left side of the tile. We do this in case there are + # edge artifacts. We don't bother with any 'blending' in the current implementation - for most upscalers + # it seems unnecessary, but we may find a need in the future. + top_overlap = scaled_tile.overlap.top // 2 + left_overlap = scaled_tile.overlap.left // 2 + output_tensor[ + scaled_tile.coords.top + top_overlap : scaled_tile.coords.bottom, + scaled_tile.coords.left + left_overlap : scaled_tile.coords.right, + :, + ] = output_tile[top_overlap:, left_overlap:, :] # Convert the output tensor to a PIL image. - pil_image = SpandrelImageToImageModel.tensor_to_pil(image_tensor) + np_image = output_tensor.detach().numpy().astype(np.uint8) + pil_image = Image.fromarray(np_image) image_dto = context.images.save(image=pil_image) return ImageOutput.build(image_dto) diff --git a/invokeai/backend/spandrel_image_to_image_model.py b/invokeai/backend/spandrel_image_to_image_model.py index adb78d0d712..ccf02c57ac0 100644 --- a/invokeai/backend/spandrel_image_to_image_model.py +++ b/invokeai/backend/spandrel_image_to_image_model.py @@ -126,6 +126,11 @@ def dtype(self) -> torch.dtype: """The dtype of the underlying model.""" return self._spandrel_model.dtype + @property + def scale(self) -> int: + """The scale of the model (e.g. 1x, 2x, 4x, etc.).""" + return self._spandrel_model.scale + def calc_size(self) -> int: """Get size of the model in memory in bytes.""" # HACK(ryand): Fix this issue with circular imports.