feat: init

.gitignore

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+# Created by https://www.toptal.com/developers/gitignore/api/python,visualstudiocode,linux,opencv
+# Edit at https://www.toptal.com/developers/gitignore?templates=python,visualstudiocode,linux,opencv
+
+### Linux ###
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+### OpenCV ###
+#OpenCV for Mac and Linux
+#build and release folders
+*/CMakeFiles
+*/CMakeCache.txt
+*/Makefile
+*/cmake_install.cmake
+.DS_Store
+
+### Python ###
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+### Python Patch ###
+# Poetry local configuration file - https://python-poetry.org/docs/configuration/#local-configuration
+poetry.toml
+
+# ruff
+.ruff_cache/
+
+# LSP config files
+pyrightconfig.json
+
+### VisualStudioCode ###
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/*.code-snippets
+
+# Local History for Visual Studio Code
+.history/
+
+# Built Visual Studio Code Extensions
+*.vsix
+
+### VisualStudioCode Patch ###
+# Ignore all local history of files
+.history
+.ionide
+
+# End of https://www.toptal.com/developers/gitignore/api/python,visualstudiocode,linux,opencv
+
+.venv

README.md

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+---
+title: PythonTools
+emoji: 🚀
+colorFrom: blue
+colorTo: purple
+sdk: gradio
+sdk_version: 4.12.0
+app_file: app.py
+pinned: false
+---
+
+# PythonTools
+

_hacked.py

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+import os
+import sys
+from pathlib import Path
+
+script_dir = Path(os.path.dirname(os.path.realpath(__file__)))
+sys.path.append(script_dir.as_posix())

app.py

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+import _hacked  # noqa
+import gradio as gr
+
+from python_tools.tools import image_20231225
+
+iface = gr.TabbedInterface(
+    interface_list=[image_20231225.get_ui()], tab_names=["image_20231225"]
+)
+
+iface.launch()

python_tools/tools/image_20231225/__init__.py

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+import gradio as gr
+import numpy as np
+from PIL import Image
+import cv2
+
+
+def get_max_contours(contours):
+    max_rect = None
+    max_area = 0
+    for cnt in contours:
+        rect = cv2.minAreaRect(cnt)
+        area = cv2.contourArea(cnt)
+        if area > max_area:
+            max_area = area
+            max_rect = rect
+
+    return max_rect, cnt
+
+
+def find_rotation_angle(image):
+    gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
+
+    _, thresh = cv2.threshold(gray, 150, 255, cv2.THRESH_BINARY)
+
+    contours, _ = cv2.findContours(thresh, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
+
+    max_rect, cnt = get_max_contours(contours)
+    if not max_rect:
+        return None
+
+    angle = max_rect[2]
+    if angle < -45:
+        angle = 90 + angle
+
+    return angle
+
+
+# rotate image to correct text orientation
+def image_rotate_text(img):
+    angle = find_rotation_angle(img)
+    print(f"rotated angle: {angle}")
+
+    h, w = img.shape[:2]
+    center = (w / 2, h / 2)
+    M = cv2.getRotationMatrix2D(center, angle, 1.0)
+
+    # 旋转图像
+    rotated = cv2.warpAffine(
+        img,
+        M,
+        (w, h),
+        flags=cv2.INTER_LINEAR,
+        borderMode=cv2.BORDER_CONSTANT,
+        borderValue=(0, 0, 0),
+    )
+    return rotated
+
+
+# crop image to remove unnecessary borders
+def image_crop_border(img):
+    gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
+
+    _, thresh = cv2.threshold(gray, 127, 255, cv2.THRESH_BINARY)
+
+    contours, _ = cv2.findContours(thresh, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
+
+    if not contours:
+        return None
+
+    counters = max(contours, key=cv2.contourArea)
+
+    x, y, w, h = cv2.boundingRect(counters)
+
+    def with_delta(x, y, w, h, delta):
+        return x - delta, y - delta, w + delta * 2, h + delta * 2
+
+    x, y, w, h = with_delta(x, y, w, h, 100)
+
+    cropped_image = img[y : y + h, x : x + w]
+    return cropped_image
+
+
+def process(img):
+    img = image_rotate_text(img)
+    img = image_crop_border(img)
+
+    return img
+
+
+def pil_process_image(image):
+    img = np.array(image)
+    processed = process(img)
+    return Image.fromarray(processed)
+
+
+def get_ui():
+    return gr.Interface(
+        fn=pil_process_image,
+        inputs=gr.Image(),
+        outputs=gr.Image(type="pil"),
+        title="2023-12-25 Image Processing",
+        description="旋转和裁剪图像以纠正文本方向并去除不必要的边框",
+    )
+
+
+if __name__ == "__main__":
+    get_ui()

requirements.txt

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+opencv-python>=1.26
+gradio
+pillow>=10.1.0