add lapstyle_ocean module

modules/image/Image_gan/style_transfer/lapstyle_ocean/README.md

+# lapstyle_ocean
+
+|模型名称|lapstyle_ocean|
+| :--- | :---: |
+|类别|图像 - 风格迁移|
+|网络|LapStyle|
+|数据集|-|
+|是否支持Fine-tuning|否|
+|模型大小|121MB|
+|最新更新日期|2021-12-07|
+|数据指标|-|
+
+
+## 一、模型基本信息  
+
+- ### 应用效果展示
+  - 样例结果示例：
+    <p align="center">
+    <img src="https://user-images.githubusercontent.com/22424850/144995283-77ddba45-9efe-4f72-914c-1bff734372ed.png"  width = "50%"  hspace='10'/>
+    <br />
+    输入内容图形
+    <br />
+    <img src="https://user-images.githubusercontent.com/22424850/144997958-9162c304-dff4-4048-a197-607882ded00c.png"  width = "50%" hspace='10'/>
+    <br />
+    输入风格图形
+    <br />
+    <img src="https://user-images.githubusercontent.com/22424850/144997967-43d7579c-cc73-452e-a920-5759eb5a5d67.png"  width = "50%"  hspace='10'/>
+    <br />
+    输出图像
+     <br />
+    </p>
+
+- ### 模型介绍
+
+  - LapStyle--拉普拉斯金字塔风格化网络，是一种能够生成高质量风格化图的快速前馈风格化网络，能渐进地生成复杂的纹理迁移效果，同时能够在512分辨率下达到100fps的速度。可实现多种不同艺术风格的快速迁移，在艺术图像生成、滤镜等领域有广泛的应用。
+
+  - 更多详情参考：[Drafting and Revision: Laplacian Pyramid Network for Fast High-Quality Artistic Style Transfer](https://arxiv.org/pdf/2104.05376.pdf)
+
+
+
+## 二、安装
+
+- ### 1、环境依赖  
+  - ppgan
+
+- ### 2、安装
+
+  - ```shell
+    $ hub install lapstyle_ocean
+    ```
+  - 如您安装时遇到问题，可参考：[零基础windows安装](../../../../docs/docs_ch/get_start/windows_quickstart.md)
+ | [零基础Linux安装](../../../../docs/docs_ch/get_start/linux_quickstart.md) | [零基础MacOS安装](../../../../docs/docs_ch/get_start/mac_quickstart.md)
+
+## 三、模型API预测
+
+- ### 1、命令行预测
+
+  - ```shell
+    # Read from a file
+    $ hub run lapstyle_ocean --content "/PATH/TO/IMAGE" --style "/PATH/TO/IMAGE1"
+    ```
+  - 通过命令行方式实现风格转换模型的调用，更多请见 [PaddleHub命令行指令](../../../../docs/docs_ch/tutorial/cmd_usage.rst)
+
+- ### 2、预测代码示例
+
+  - ```python
+    import paddlehub as hub
+
+    module = hub.Module(name="lapstyle_ocean")
+    content = cv2.imread("/PATH/TO/IMAGE")
+    style = cv2.imread("/PATH/TO/IMAGE1")
+    results = module.style_transfer(images=[{'content':content, 'style':style}], output_dir='./transfer_result', use_gpu=True)
+    ```
+
+- ### 3、API
+
+  - ```python
+    style_transfer(images=None, paths=None, output_dir='./transfer_result/', use_gpu=False, visualization=True)
+    ```
+    - 风格转换API。
+
+    - **参数**
+
+      - images (list[dict]): data of images, 每一个元素都为一个 dict，有关键字 content, style, 相应取值为：
+        - content (numpy.ndarray): 待转换的图片，shape 为 \[H, W, C\]，BGR格式；<br/>
+        - style (numpy.ndarray) : 风格图像，shape为 \[H, W, C\]，BGR格式；<br/>
+      - paths (list[str]): paths to images, 每一个元素都为一个dict, 有关键字 content, style, 相应取值为：
+        - content (str): 待转换的图片的路径；<br/>
+        - style (str) : 风格图像的路径；<br/>
+      - output\_dir (str): 结果保存的路径； <br/>
+      - use\_gpu (bool): 是否使用 GPU；<br/>
+      - visualization(bool): 是否保存结果到本地文件夹
+
+
+## 四、服务部署
+
+- PaddleHub Serving可以部署一个在线图像风格转换服务。
+
+- ### 第一步：启动PaddleHub Serving
+
+  - 运行启动命令：
+  - ```shell
+    $ hub serving start -m lapstyle_ocean
+    ```
+
+  - 这样就完成了一个图像风格转换的在线服务API的部署，默认端口号为8866。
+
+  - **NOTE:** 如使用GPU预测，则需要在启动服务之前，请设置CUDA\_VISIBLE\_DEVICES环境变量，否则不用设置。
+
+- ### 第二步：发送预测请求
+
+  - 配置好服务端，以下数行代码即可实现发送预测请求，获取预测结果
+
+  - ```python
+    import requests
+    import json
+    import cv2
+    import base64
+
+
+    def cv2_to_base64(image):
+      data = cv2.imencode('.jpg', image)[1]
+      return base64.b64encode(data.tostring()).decode('utf8')
+
+    # 发送HTTP请求
+    data = {'images':[{'content': cv2_to_base64(cv2.imread("/PATH/TO/IMAGE")), 'style': cv2_to_base64(cv2.imread("/PATH/TO/IMAGE1"))}]}
+    headers = {"Content-type": "application/json"}
+    url = "http://127.0.0.1:8866/predict/lapstyle_ocean"
+    r = requests.post(url=url, headers=headers, data=json.dumps(data))
+
+    # 打印预测结果
+    print(r.json()["results"])
+
+## 五、更新历史
+
+* 1.0.0
+
+  初始发布
+
+  - ```shell
+    $ hub install lapstyle_ocean==1.0.0
+    ```

modules/image/Image_gan/style_transfer/lapstyle_ocean/model.py

+# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserve.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import cv2 as cv
+import numpy as np
+import urllib.request
+from PIL import Image
+
+import paddle
+import paddle.nn.functional as F
+from paddle.vision.transforms import functional
+
+from ppgan.utils.visual import tensor2img
+from ppgan.models.generators import DecoderNet, Encoder, RevisionNet
+
+
+def img(img):
+    # some images have 4 channels
+    if img.shape[2] > 3:
+        img = img[:, :, :3]
+    # HWC to CHW
+    return img
+
+
+def img_totensor(content_img, style_img):
+    if content_img.ndim == 2:
+        content_img = cv.cvtColor(content_img, cv.COLOR_GRAY2RGB)
+    else:
+        content_img = cv.cvtColor(content_img, cv.COLOR_BGR2RGB)
+    h, w, c = content_img.shape
+    content_img = Image.fromarray(content_img)
+    content_img = content_img.resize((512, 512), Image.BILINEAR)
+    content_img = np.array(content_img)
+    content_img = img(content_img)
+    content_img = functional.to_tensor(content_img)
+
+    style_img = cv.cvtColor(style_img, cv.COLOR_BGR2RGB)
+    style_img = Image.fromarray(style_img)
+    style_img = style_img.resize((512, 512), Image.BILINEAR)
+    style_img = np.array(style_img)
+    style_img = img(style_img)
+    style_img = functional.to_tensor(style_img)
+
+    content_img = paddle.unsqueeze(content_img, axis=0)
+    style_img = paddle.unsqueeze(style_img, axis=0)
+    return content_img, style_img, h, w
+
+
+def tensor_resample(tensor, dst_size, mode='bilinear'):
+    return F.interpolate(tensor, dst_size, mode=mode, align_corners=False)
+
+
+def laplacian(x):
+    """
+    Laplacian
+
+    return:
+       x - upsample(downsample(x))
+    """
+    return x - tensor_resample(tensor_resample(x, [x.shape[2] // 2, x.shape[3] // 2]), [x.shape[2], x.shape[3]])
+
+
+def make_laplace_pyramid(x, levels):
+    """
+    Make Laplacian Pyramid
+    """
+    pyramid = []
+    current = x
+    for i in range(levels):
+        pyramid.append(laplacian(current))
+        current = tensor_resample(current, (max(current.shape[2] // 2, 1), max(current.shape[3] // 2, 1)))
+    pyramid.append(current)
+    return pyramid
+
+
+def fold_laplace_pyramid(pyramid):
+    """
+    Fold Laplacian Pyramid
+    """
+    current = pyramid[-1]
+    for i in range(len(pyramid) - 2, -1, -1):  # iterate from len-2 to 0
+        up_h, up_w = pyramid[i].shape[2], pyramid[i].shape[3]
+        current = pyramid[i] + tensor_resample(current, (up_h, up_w))
+    return current
+
+
+class LapStylePredictor:
+    def __init__(self, weight_path=None):
+
+        self.net_enc = Encoder()
+        self.net_dec = DecoderNet()
+        self.net_rev = RevisionNet()
+        self.net_rev_2 = RevisionNet()
+
+        self.net_enc.set_dict(paddle.load(weight_path)['net_enc'])
+        self.net_enc.eval()
+        self.net_dec.set_dict(paddle.load(weight_path)['net_dec'])
+        self.net_dec.eval()
+        self.net_rev.set_dict(paddle.load(weight_path)['net_rev'])
+        self.net_rev.eval()
+        self.net_rev_2.set_dict(paddle.load(weight_path)['net_rev_2'])
+        self.net_rev_2.eval()
+
+    def run(self, content_img, style_image):
+        content_img, style_img, h, w = img_totensor(content_img, style_image)
+        pyr_ci = make_laplace_pyramid(content_img, 2)
+        pyr_si = make_laplace_pyramid(style_img, 2)
+        pyr_ci.append(content_img)
+        pyr_si.append(style_img)
+        cF = self.net_enc(pyr_ci[2])
+        sF = self.net_enc(pyr_si[2])
+        stylized_small = self.net_dec(cF, sF)
+        stylized_up = F.interpolate(stylized_small, scale_factor=2)
+
+        revnet_input = paddle.concat(x=[pyr_ci[1], stylized_up], axis=1)
+        stylized_rev_lap = self.net_rev(revnet_input)
+        stylized_rev = fold_laplace_pyramid([stylized_rev_lap, stylized_small])
+
+        stylized_up = F.interpolate(stylized_rev, scale_factor=2)
+
+        revnet_input = paddle.concat(x=[pyr_ci[0], stylized_up], axis=1)
+        stylized_rev_lap_second = self.net_rev_2(revnet_input)
+        stylized_rev_second = fold_laplace_pyramid([stylized_rev_lap_second, stylized_rev_lap, stylized_small])
+
+        stylized = stylized_rev_second
+        stylized_visual = tensor2img(stylized, min_max=(0., 1.))
+
+        return stylized_visual

modules/image/Image_gan/style_transfer/lapstyle_ocean/module.py

+# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import argparse
+import copy
+
+import paddle
+import paddlehub as hub
+from paddlehub.module.module import moduleinfo, runnable, serving
+import numpy as np
+import cv2
+from skimage.io import imread
+from skimage.transform import rescale, resize
+
+from .model import LapStylePredictor
+from .util import base64_to_cv2
+
+
+@moduleinfo(
+    name="lapstyle_ocean",
+    type="CV/style_transfer",
+    author="paddlepaddle",
+    author_email="",
+    summary="",
+    version="1.0.0")
+class Lapstyle_ocean:
+    def __init__(self):
+        self.pretrained_model = os.path.join(self.directory, "lapstyle_ocean.pdparams")
+
+        self.network = LapStylePredictor(weight_path=self.pretrained_model)
+
+    def style_transfer(self,
+                       images=None,
+                       paths=None,
+                       output_dir='./transfer_result/',
+                       use_gpu=False,
+                       visualization=True):
+        '''
+        Transfer a image to ocean style.
+
+        images (list[dict]): data of images, 每一个元素都为一个 dict，有关键字 content, style, 相应取值为：
+          - content (numpy.ndarray): 待转换的图片，shape 为 \[H, W, C\]，BGR格式；<br/>
+          - style (numpy.ndarray) : 风格图像，shape为 \[H, W, C\]，BGR格式；<br/>
+        paths (list[str]): paths to images, 每一个元素都为一个dict, 有关键字 content, style, 相应取值为：
+          - content (str): 待转换的图片的路径；<br/>
+          - style (str) : 风格图像的路径；<br/>
+
+        output_dir: the dir to save the results
+        use_gpu: if True, use gpu to perform the computation, otherwise cpu.
+        visualization: if True, save results in output_dir.
+        '''
+        results = []
+        paddle.disable_static()
+        place = 'gpu:0' if use_gpu else 'cpu'
+        place = paddle.set_device(place)
+        if images == None and paths == None:
+            print('No image provided. Please input an image or a image path.')
+            return
+
+        if images != None:
+            for image_dict in images:
+                content_img = image_dict['content']
+                style_img = image_dict['style']
+                results.append(self.network.run(content_img, style_img))
+
+        if paths != None:
+            for path_dict in paths:
+                content_img = cv2.imread(path_dict['content'])
+                style_img = cv2.imread(path_dict['style'])
+                results.append(self.network.run(content_img, style_img))
+
+        if visualization == True:
+            if not os.path.exists(output_dir):
+                os.makedirs(output_dir, exist_ok=True)
+            for i, out in enumerate(results):
+                cv2.imwrite(os.path.join(output_dir, 'output_{}.png'.format(i)), out[:, :, ::-1])
+
+        return results
+
+    @runnable
+    def run_cmd(self, argvs: list):
+        """
+        Run as a command.
+        """
+        self.parser = argparse.ArgumentParser(
+            description="Run the {} module.".format(self.name),
+            prog='hub run {}'.format(self.name),
+            usage='%(prog)s',
+            add_help=True)
+
+        self.arg_input_group = self.parser.add_argument_group(title="Input options", description="Input data. Required")
+        self.arg_config_group = self.parser.add_argument_group(
+            title="Config options", description="Run configuration for controlling module behavior, not required.")
+        self.add_module_config_arg()
+        self.add_module_input_arg()
+        self.args = self.parser.parse_args(argvs)
+
+        self.style_transfer(
+            paths=[{
+                'content': self.args.content,
+                'style': self.args.style
+            }],
+            output_dir=self.args.output_dir,
+            use_gpu=self.args.use_gpu,
+            visualization=self.args.visualization)
+
+    @serving
+    def serving_method(self, images, **kwargs):
+        """
+        Run as a service.
+        """
+        images_decode = copy.deepcopy(images)
+        for image in images_decode:
+            image['content'] = base64_to_cv2(image['content'])
+            image['style'] = base64_to_cv2(image['style'])
+        results = self.style_transfer(images_decode, **kwargs)
+        tolist = [result.tolist() for result in results]
+        return tolist
+
+    def add_module_config_arg(self):
+        """
+        Add the command config options.
+        """
+        self.arg_config_group.add_argument('--use_gpu', action='store_true', help="use GPU or not")
+
+        self.arg_config_group.add_argument(
+            '--output_dir', type=str, default='transfer_result', help='output directory for saving result.')
+        self.arg_config_group.add_argument('--visualization', type=bool, default=False, help='save results or not.')
+
+    def add_module_input_arg(self):
+        """
+        Add the command input options.
+        """
+        self.arg_input_group.add_argument('--content', type=str, help="path to content image.")
+        self.arg_input_group.add_argument('--style', type=str, help="path to style image.")

modules/image/Image_gan/style_transfer/lapstyle_ocean/requirements.txt

+ppgan

modules/image/Image_gan/style_transfer/lapstyle_ocean/util.py

+import base64
+import cv2
+import numpy as np
+
+
+def base64_to_cv2(b64str):
+    data = base64.b64decode(b64str.encode('utf8'))
+    data = np.fromstring(data, np.uint8)
+    data = cv2.imdecode(data, cv2.IMREAD_COLOR)
+    return data