backend add outpainting
This commit is contained in:
Qing
@@ -12,6 +12,7 @@ from lama_cleaner.helper import (
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pad_img_to_modulo,
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switch_mps_device,
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)
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from lama_cleaner.model.g_diffuser_bot import expand_image, np_img_grey_to_rgb
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from lama_cleaner.schema import Config, HDStrategy
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@@ -266,15 +267,93 @@ class DiffusionInpaintModel(InpaintModel):
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"""
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# boxes = boxes_from_mask(mask)
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if config.use_croper:
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crop_img, crop_mask, (l, t, r, b) = self._apply_cropper(image, mask, config)
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crop_image = self._scaled_pad_forward(crop_img, crop_mask, config)
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inpaint_result = image[:, :, ::-1]
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inpaint_result[t:b, l:r, :] = crop_image
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if config.croper_is_outpainting:
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inpaint_result = self._do_outpainting(image, config)
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else:
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crop_img, crop_mask, (l, t, r, b) = self._apply_cropper(
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image, mask, config
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)
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crop_image = self._scaled_pad_forward(crop_img, crop_mask, config)
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inpaint_result = image[:, :, ::-1]
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inpaint_result[t:b, l:r, :] = crop_image
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else:
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inpaint_result = self._scaled_pad_forward(image, mask, config)
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return inpaint_result
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def _do_outpainting(self, image, config: Config):
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# cropper 和 image 在同一个坐标系下，croper_x/y 可能为负数
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# 从 image 中 crop 出 outpainting 区域
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image_h, image_w = image.shape[:2]
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cropper_l = config.croper_x
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cropper_t = config.croper_y
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cropper_r = config.croper_x + config.croper_width
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cropper_b = config.croper_y + config.croper_height
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image_l = 0
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image_t = 0
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image_r = image_w
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image_b = image_h
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# 类似求 IOU
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l = max(cropper_l, image_l)
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t = max(cropper_t, image_t)
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r = min(cropper_r, image_r)
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b = min(cropper_b, image_b)
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assert (
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0 <= l < r and 0 <= t < b
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), f"cropper and image not overlap, {l},{t},{r},{b}"
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cropped_image = image[t:b, l:r, :]
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padding_l = max(0, image_l - cropper_l)
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padding_t = max(0, image_t - cropper_t)
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padding_r = max(0, cropper_r - image_r)
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padding_b = max(0, cropper_b - image_b)
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zero_padding_count = [padding_l, padding_t, padding_r, padding_b].count(0)
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if zero_padding_count not in [0, 3]:
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logger.warning(
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f"padding count({zero_padding_count}) not 0 or 3, may result in bad edge outpainting"
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)
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expanded_image, mask_image = expand_image(
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cropped_image,
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left=padding_l,
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top=padding_t,
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right=padding_r,
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bottom=padding_b,
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softness=config.sd_outpainting_softness,
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space=config.sd_outpainting_space,
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)
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# 最终扩大了的 image, BGR
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expanded_cropped_result_image = self._scaled_pad_forward(
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expanded_image, mask_image, config
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)
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# RGB -> BGR
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outpainting_image = cv2.copyMakeBorder(
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image,
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left=padding_l,
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top=padding_t,
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right=padding_r,
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bottom=padding_b,
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borderType=cv2.BORDER_CONSTANT,
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value=0,
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)[:, :, ::-1]
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# 把 cropped_result_image 贴到 outpainting_image 上，这一步不需要 blend
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paste_t = 0 if config.croper_y < 0 else config.croper_y
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paste_l = 0 if config.croper_x < 0 else config.croper_x
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outpainting_image[
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paste_t : paste_t + expanded_cropped_result_image.shape[0],
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paste_l : paste_l + expanded_cropped_result_image.shape[1],
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:,
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] = expanded_cropped_result_image
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return outpainting_image
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def _scaled_pad_forward(self, image, mask, config: Config):
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longer_side_length = int(config.sd_scale * max(image.shape[:2]))
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origin_size = image.shape[:2]
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@@ -291,8 +370,14 @@ class DiffusionInpaintModel(InpaintModel):
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(origin_size[1], origin_size[0]),
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interpolation=cv2.INTER_CUBIC,
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)
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original_pixel_indices = mask < 127
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inpaint_result[original_pixel_indices] = image[:, :, ::-1][
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original_pixel_indices
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]
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# blend result, copy from g_diffuser_bot
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# mask_rgb = 1.0 - np_img_grey_to_rgb(mask / 255.0)
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# inpaint_result = np.clip(
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# inpaint_result * (1.0 - mask_rgb) + image * mask_rgb, 0.0, 255.0
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# )
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# original_pixel_indices = mask < 127
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# inpaint_result[original_pixel_indices] = image[:, :, ::-1][
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# original_pixel_indices
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# ]
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return inpaint_result
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181
lama_cleaner/model/g_diffuser_bot.py
Normal file
181
lama_cleaner/model/g_diffuser_bot.py
Normal file
@@ -0,0 +1,181 @@
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# code copy from: https://github.com/parlance-zz/g-diffuser-bot
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import cv2
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import numpy as np
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def np_img_grey_to_rgb(data):
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if data.ndim == 3:
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return data
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return np.expand_dims(data, 2) * np.ones((1, 1, 3))
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def convolve(data1, data2): # fast convolution with fft
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if data1.ndim != data2.ndim: # promote to rgb if mismatch
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if data1.ndim < 3:
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data1 = np_img_grey_to_rgb(data1)
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if data2.ndim < 3:
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data2 = np_img_grey_to_rgb(data2)
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return ifft2(fft2(data1) * fft2(data2))
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def fft2(data):
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if data.ndim > 2: # multiple channels
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out_fft = np.zeros(
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(data.shape[0], data.shape[1], data.shape[2]), dtype=np.complex128
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)
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for c in range(data.shape[2]):
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c_data = data[:, :, c]
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out_fft[:, :, c] = np.fft.fft2(np.fft.fftshift(c_data), norm="ortho")
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out_fft[:, :, c] = np.fft.ifftshift(out_fft[:, :, c])
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else: # single channel
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out_fft = np.zeros((data.shape[0], data.shape[1]), dtype=np.complex128)
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out_fft[:, :] = np.fft.fft2(np.fft.fftshift(data), norm="ortho")
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out_fft[:, :] = np.fft.ifftshift(out_fft[:, :])
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return out_fft
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def ifft2(data):
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if data.ndim > 2: # multiple channels
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out_ifft = np.zeros(
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(data.shape[0], data.shape[1], data.shape[2]), dtype=np.complex128
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)
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for c in range(data.shape[2]):
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c_data = data[:, :, c]
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out_ifft[:, :, c] = np.fft.ifft2(np.fft.fftshift(c_data), norm="ortho")
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out_ifft[:, :, c] = np.fft.ifftshift(out_ifft[:, :, c])
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else: # single channel
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out_ifft = np.zeros((data.shape[0], data.shape[1]), dtype=np.complex128)
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out_ifft[:, :] = np.fft.ifft2(np.fft.fftshift(data), norm="ortho")
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out_ifft[:, :] = np.fft.ifftshift(out_ifft[:, :])
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return out_ifft
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def get_gradient_kernel(width, height, std=3.14, mode="linear"):
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window_scale_x = float(
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width / min(width, height)
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) # for non-square aspect ratios we still want a circular kernel
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window_scale_y = float(height / min(width, height))
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if mode == "gaussian":
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x = (np.arange(width) / width * 2.0 - 1.0) * window_scale_x
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kx = np.exp(-x * x * std)
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if window_scale_x != window_scale_y:
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y = (np.arange(height) / height * 2.0 - 1.0) * window_scale_y
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ky = np.exp(-y * y * std)
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else:
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y = x
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ky = kx
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return np.outer(kx, ky)
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elif mode == "linear":
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x = (np.arange(width) / width * 2.0 - 1.0) * window_scale_x
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if window_scale_x != window_scale_y:
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y = (np.arange(height) / height * 2.0 - 1.0) * window_scale_y
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else:
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y = x
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return np.clip(1.0 - np.sqrt(np.add.outer(x * x, y * y)) * std / 3.14, 0.0, 1.0)
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else:
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raise Exception("Error: Unknown mode in get_gradient_kernel: {0}".format(mode))
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def image_blur(data, std=3.14, mode="linear"):
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width = data.shape[0]
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height = data.shape[1]
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kernel = get_gradient_kernel(width, height, std, mode=mode)
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return np.real(convolve(data, kernel / np.sqrt(np.sum(kernel * kernel))))
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def soften_mask(np_rgba_image, softness, space):
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if softness == 0:
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return np_rgba_image
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softness = min(softness, 1.0)
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space = np.clip(space, 0.0, 1.0)
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original_max_opacity = np.max(np_rgba_image[:, :, 3])
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out_mask = np_rgba_image[:, :, 3] <= 0.0
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blurred_mask = image_blur(np_rgba_image[:, :, 3], 3.5 / softness, mode="linear")
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blurred_mask = np.maximum(blurred_mask - np.max(blurred_mask[out_mask]), 0.0)
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np_rgba_image[
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:, :, 3
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] *= blurred_mask # preserve partial opacity in original input mask
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np_rgba_image[:, :, 3] /= np.max(np_rgba_image[:, :, 3]) # renormalize
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np_rgba_image[:, :, 3] = np.clip(
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np_rgba_image[:, :, 3] - space, 0.0, 1.0
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) # make space
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np_rgba_image[:, :, 3] /= np.max(np_rgba_image[:, :, 3]) # and renormalize again
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np_rgba_image[:, :, 3] *= original_max_opacity # restore original max opacity
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return np_rgba_image
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def expand_image(
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cv2_img, top: int, right: int, bottom: int, left: int, softness: float, space: float
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):
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origin_h, origin_w = cv2_img.shape[:2]
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new_width = cv2_img.shape[1] + left + right
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new_height = cv2_img.shape[0] + top + bottom
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new_img = np.zeros((new_height, new_width, 4), np.uint8) # expanded image is rgba
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print(
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"Expanding input image from {0}x{1} to {2}x{3}".format(
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cv2_img.shape[1], cv2_img.shape[0], new_width, new_height
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)
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)
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if cv2_img.shape[2] == 3: # rgb input image
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new_img[
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top : top + cv2_img.shape[0], left : left + cv2_img.shape[1], 0:3
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] = cv2_img
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new_img[
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top : top + cv2_img.shape[0], left : left + cv2_img.shape[1], 3
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] = 255 # fully opaque
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elif cv2_img.shape[2] == 4: # rgba input image
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new_img[top : top + cv2_img.shape[0], left : left + cv2_img.shape[1]] = cv2_img
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else:
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raise Exception(
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"Unsupported image format: {0} channels".format(cv2_img.shape[2])
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)
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if softness > 0.0:
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new_img = soften_mask(new_img / 255.0, softness / 100.0, space / 100.0)
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new_img = (np.clip(new_img, 0.0, 1.0) * 255.0).astype(np.uint8)
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mask_image = 255.0 - new_img[:, :, 3] # extract mask from alpha channel and invert
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rgb_init_image = (
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0.0 + new_img[:, :, 0:3]
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) # strip mask from init_img leaving only rgb channels
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hard_mask = np.zeros_like(cv2_img[:, :, 0])
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if top != 0:
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hard_mask[0 : origin_h // 2, :] = 255
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if bottom != 0:
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hard_mask[origin_h // 2 :, :] = 255
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if left != 0:
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hard_mask[:, 0 : origin_w // 2] = 255
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if right != 0:
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hard_mask[:, origin_w // 2 :] = 255
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hard_mask = cv2.copyMakeBorder(
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hard_mask, top, bottom, left, right, cv2.BORDER_CONSTANT, value=255
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)
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mask_image = np.where(hard_mask > 0, mask_image, 0)
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return rgb_init_image.astype(np.uint8), mask_image.astype(np.uint8)
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if __name__ == "__main__":
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from pathlib import Path
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current_dir = Path(__file__).parent.absolute().resolve()
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image_path = current_dir.parent / "tests" / "bunny.jpeg"
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init_image = cv2.imread(str(image_path))
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init_image, mask_image = expand_image(
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init_image,
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200,
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200,
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0,
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0,
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60,
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50,
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)
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print(mask_image.dtype, mask_image.min(), mask_image.max())
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print(init_image.dtype, init_image.min(), init_image.max())
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mask_image = mask_image.astype(np.uint8)
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init_image = init_image.astype(np.uint8)
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cv2.imwrite("expanded_image.png", init_image)
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cv2.imwrite("expanded_mask.png", mask_image)
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@@ -27,7 +27,7 @@ def make_beta_schedule(
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if schedule == "linear":
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betas = (
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torch.linspace(
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linear_start ** 0.5, linear_end ** 0.5, n_timestep, dtype=torch.float64
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linear_start**0.5, linear_end**0.5, n_timestep, dtype=torch.float64
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)
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** 2
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)
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@@ -772,7 +772,7 @@ def conv2d_resample(
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f=f,
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up=up,
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padding=[px0, px1, py0, py1],
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gain=up ** 2,
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gain=up**2,
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flip_filter=flip_filter,
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)
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return x
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@@ -814,7 +814,7 @@ def conv2d_resample(
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x=x,
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f=f,
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padding=[px0 + pxt, px1 + pxt, py0 + pyt, py1 + pyt],
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gain=up ** 2,
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gain=up**2,
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flip_filter=flip_filter,
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)
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if down > 1:
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@@ -834,7 +834,7 @@ def conv2d_resample(
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f=(f if up > 1 else None),
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up=up,
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padding=[px0, px1, py0, py1],
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gain=up ** 2,
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gain=up**2,
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flip_filter=flip_filter,
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)
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x = _conv2d_wrapper(x=x, w=w, groups=groups, flip_weight=flip_weight)
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@@ -870,7 +870,7 @@ class Conv2dLayer(torch.nn.Module):
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self.register_buffer("resample_filter", setup_filter(resample_filter))
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self.conv_clamp = conv_clamp
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self.padding = kernel_size // 2
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self.weight_gain = 1 / np.sqrt(in_channels * (kernel_size ** 2))
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self.weight_gain = 1 / np.sqrt(in_channels * (kernel_size**2))
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self.act_gain = activation_funcs[activation].def_gain
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memory_format = (
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