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| title: Helpful AI | |
| emoji: ⚡ | |
| colorFrom: indigo | |
| colorTo: pink | |
| sdk: docker | |
| app_file: app.py | |
| pinned: false | |
| # ⚡ Antigravity Studio - AI Image & Document Workspace | |
| A complete, production-grade, state-of-the-art **Image & PDF Manipulation Web Application** consisting of two primary workspaces: | |
| 1. **AI Background Remover Workspace**: Isolate foreground subjects with U²-Net deep learning or GrabCut, refine fine hair details with Guided Filter matting, and generate customizable realistic drop shadows. | |
| 2. **AI In-Image Text Editor Workspace**: Automatically detect, erase, and replace text in images or multi-page PDFs while perfectly matching original fonts, sizes, and ink colors. | |
| Built with **Streamlit** (frontend) and **Python + OpenCV + Deep Learning** (backend). | |
| --- | |
| ## ✨ Workspace 1: AI Background Remover | |
| Allows users to upload an image, extract the subject with professional-grade borders, and customize visual compositions. | |
| - **AI U²-Net Neural Network Mode**: Leverages pre-trained deep learning to automatically segment complex shapes (like portraits, hair, and soft details) without bounding box configurations. | |
| - **GrabCut General Subject Mode**: Detects bounding boxes automatically or supports manual coordinate tuning. | |
| - **Signature & Text (Ink Extraction) Mode**: Uses color distance maps to isolate handwritten ink from paper backdrops (perfect for signatures). | |
| - **Advanced Edge Matting**: | |
| - *Guided Filter Matting*: An edge-preserving linear filtering algorithm that aligns alpha transitions to individual hair fibers. | |
| - *Morphological Closing*: Fills inner holes and smooths contours. | |
| - *Speckle Filtering*: Cleans isolated floating noise. | |
| - **Realistic Drop Shadow Engine**: Generates natural drop shadows beneath isolated subjects. Customize opacity, blur softness, offset distance, and angle. | |
| - **Interactive Composite Studio**: Composite transparent cutouts over Checkerboard grids, Solid colors, gradients (*Midnight Glow, Sunset Studio, Neon Cyber*), or uploaded background images. | |
| --- | |
| ## ✨ Workspace 2: AI Document & PDF Text Editor | |
| Allows users to upload an image or multi-page PDF, find text, and perform clean in-place corrections. | |
| - **Automated Layout Scan**: Scans images or document page textures using **EasyOCR** to discover bounding boxes of all text segments. | |
| - **Translucent OCR Overlays**: Renders glowing overlays displaying editable text fields in the document. | |
| - **Zero-Configuration PDF Engine**: Powered by **PyMuPDF (Fitz)**. Render multi-page PDFs, navigate pages, and compile edited page images back into a single multi-page PDF document. | |
| - **Adaptive Ink & Paper Color Sampling**: Extracts the median BGR ink color (foreground character strokes) and surrounding paper texture color (background) using Otsu's adaptive binarization of characters. | |
| - **Seamless Texture-Preserving Eraser**: Creates a character-level binary mask, dilates it by 2px, and runs OpenCV Fast Inpainting (**Telea's algorithm**). This erases old text while preserving paper folds, grain, gridlines, and shadows. | |
| - **Adaptive Text Synthesis**: Scales the replacement text according to the bounding box height, matches standard font families (Serif, Sans-Serif, Monospace), and renders it anti-aliased with the sampled ink color. | |
| --- | |
| ## 📂 Project Structure | |
| ```text | |
| e:\bg remover\ | |
| ├── app.py # Main Streamlit dashboard routing entrypoint & CSS styles | |
| ├── requirements.txt # Unified dependency manifest | |
| ├── README.md # Detailed workspace and setup documentation | |
| │ | |
| ├── frontend/ # Modern UI Layout Modules | |
| │ ├── __init__.py | |
| │ ├── home.py # Premium Glassmorphic Studio Navigation landing page | |
| │ ├── bg_remover_ui.py # Custom Background Remover controls and workflows | |
| │ ├── text_editor_ui.py # PDF page navigation, OCR list, Find/Replace editor | |
| │ ├── preview_ui.py # Before/After comparison and backdrop composites | |
| │ └── download_ui.py # Downscaled/lazy high-res download compiler | |
| │ | |
| └── backend/ # Algorithms and Heavy Processing Backends | |
| ├── __init__.py | |
| ├── utilities.py # Image format converters and checkerboard pattern generators | |
| │ | |
| ├── bg_remover/ # Background Remover Subpackage | |
| │ ├── __init__.py | |
| │ ├── segmentation.py # GrabCut, contour analysis, and corner color GMM seeding | |
| │ ├── edge_detection.py # Fast Guided Filter matting and morphological refinements | |
| │ ├── shadow_generator.py# Affine transformation drop shadow translations and blenders | |
| │ └── image_processor.py # Background remover high-level pipeline orchestrator | |
| │ | |
| └── text_editor/ # Text Editor & Document Subpackage | |
| ├── __init__.py | |
| ├── pdf_processor.py # PyMuPDF page extractors and PDF compilers | |
| ├── ocr_engine.py # EasyOCR layout scanning engine | |
| ├── color_detector.py # Character-level ink/paper color samplers | |
| ├── font_detector.py # System TTF font loader and height-based size mapper | |
| ├── text_replacer.py # Telea inpainter and PIL anti-aliased text renderer | |
| └── orchestrator.py # Text correction orchestrator | |
| ``` | |
| --- | |
| ## 🚀 Installation & Running Locally | |
| Ensure you have **Python 3.10+** installed. Follow these steps: | |
| ### 1. Install Dependencies | |
| Open a terminal in the root of the workspace (`e:\bg remover\`) and run: | |
| ```bash | |
| pip install -r requirements.txt | |
| ``` | |
| ### 2. Run the Application | |
| Start the Streamlit dashboard: | |
| ```bash | |
| streamlit run app.py | |
| ``` | |
| ### 3. Open in Browser | |
| The local server will start and prompt you to open the dashboard at: | |
| - **Local URL**: `http://localhost:8501` | |
| --- | |
| ## 🛠️ Offline Verification & Test Suites | |
| We have built extensive automated tests to guarantee system stability and code correctness: | |
| - **Background Remover Tests**: | |
| ```bash | |
| python "C:\Users\Asus\.gemini\antigravity\brain\76a54bfc-09a7-4a96-809d-8b8c797bd925\scratch\test_pipeline.py" | |
| ``` | |
| - **Document Text Editor Tests**: | |
| ```bash | |
| python "C:\Users\Asus\.gemini\antigravity\brain\76a54bfc-09a7-4a96-809d-8b8c797bd925\scratch\test_text_editor.py" | |
| ``` | |
| Both test suites should print `[SUCCESS]` and pass seamlessly! | |