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README.md
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---
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license: apache-2.0
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tags:
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- image-classification
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- rotation-prediction
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- resnet
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- pytorch
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- vision
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datasets:
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- ILSVRC/imagenet-1k
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pipeline_tag: image-classification
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library_name: transformers
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---
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# π GyroScope β Image Rotation Prediction
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**GyroScope** is a ResNet-18 trained **from scratch** to detect whether an image is rotated by **0Β°, 90Β°, 180Β°, or 270Β°** β and correct it automatically.
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> Is that photo upside down? Let GyroScope figure it out.
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---
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## π― Task
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Given any image, GyroScope classifies its orientation into one of **4 classes**:
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| Label | Meaning | Correction |
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|-------|---------|------------|
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| 0 | 0Β° β upright β
| None |
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| 1 | 90Β° CCW | Rotate 270Β° CCW |
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| 2 | 180Β° β upside down | Rotate 180Β° |
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| 3 | 270Β° CCW (= 90Β° CW) | Rotate 90Β° CCW |
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**Correction formula:** `correction = (360 β detected_angle) % 360`
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---
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## π Benchmarks
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Trained on **50,000 images** from [ImageNet-1k](https://huggingface.co/datasets/ILSVRC/imagenet-1k) Γ 4 rotations = **200k training samples**.
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Validated on **5,000 images** Γ 4 rotations = **20k validation samples**.
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| Metric | Value |
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|--------|-------|
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| **Overall Val Accuracy** | **XX.XX%** |
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| Per-class: 0Β° (upright) | XX.X% |
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| Per-class: 90Β° CCW | XX.X% |
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| Per-class: 180Β° | XX.X% |
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| Per-class: 270Β° CCW | XX.X% |
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| Training Epochs | 12 |
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| Training Time | ~4h (Kaggle T4 GPU) |
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<!-- UPDATE the table above with your final results -->
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### Training Curve
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| Epoch | Train Acc | Val Acc |
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|-------|----------|---------|
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| 1 | 41.4% | 43.2% |
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| 2 | 52.0% | 46.9% |
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| 3 | 59.4% | 62.8% |
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| 4 | 64.1% | 66.0% |
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| 5 | 67.8% | 69.48% |
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| 6 | β | β |
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| 7 | β | β |
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| 8 | β | β |
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| 9 | β | β |
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| 10 | β | β |
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| 11 | β | β |
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| 12 | β | β |
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<!-- UPDATE with final epoch results -->
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---
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## ποΈ Architecture
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| Detail | Value |
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|--------|-------|
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| Base | ResNet-18 (from scratch, **no pretrained weights**) |
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| Parameters | 11.2M |
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| Input | 224 Γ 224 RGB |
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| Output | 4 classes (0Β°, 90Β°, 180Β°, 270Β°) |
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| Framework | π€ Hugging Face Transformers (`ResNetForImageClassification`) |
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### Training Details
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- **Optimizer:** AdamW (lr=1e-3, weight_decay=0.05)
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- **Scheduler:** Cosine annealing with 1-epoch linear warmup
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- **Loss:** CrossEntropy with label smoothing (0.1)
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- **Augmentations:** RandomCrop, ColorJitter, RandomGrayscale, RandomErasing
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- **β οΈ No flips** β horizontal/vertical flips would corrupt rotation labels
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- **Mixed precision:** FP16 via `torch.cuda.amp`
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---
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## π Quick Start
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### Installation
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```bash
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pip install transformers torch torchvision pillow requests
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```
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### Inference β Single Image from URL
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```bash
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python3 use.py
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```
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## π‘ Example
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Input (rotated 180Β°):
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GyroScope Output:
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<!--OUTPUT HERE-->
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<br>
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Corrected:
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## β οΈ Limitations
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- Rotationally symmetric images (balls, textures, patterns) are inherently ambiguous β no model can reliably classify these.
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- Trained on natural images (ImageNet). Performance may degrade on:
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- Documents / text-heavy images
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- Medical imaging
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- Satellite / aerial imagery
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- Abstract art
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Only handles 90Β° increments β arbitrary angles (e.g. 45Β° or 135Β°) are **not supported**!
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Trained from scratch on 50k images β a pretrained backbone would likely yield higher accuracy (Finetuning).
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## π Use Cases
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- πΈ Photo management β auto-correct phone/camera orientation
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- ποΈ Data preprocessing β fix rotated images in scraped datasets
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- π€ ML pipelines β orientation normalization before feeding to downstream models
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- πΌοΈ Digital archives β batch-correct scanned/uploaded images
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> Yesterday, I was sorting photos and like every photo was rotated wrong! This inspired me to make this tool π
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## π License
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Apache 2.0
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## π Acknowledgments
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- Dataset: ILSVRC/ImageNet-1k
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- Architecture: Microsoft ResNet via π€ Transformers
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- Trained on Kaggle (Tesla T4 GPU)
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---
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> GyroScope β because every image deserves to stand upright.
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