# GeoOSAM v1.3 - SAM3 CLIP Fix + Pro Licensing

**Release Date:** 2025-12-28
**Type:** Bug Fix / Feature Enhancement / Licensing

---

## 🎉 What's New

### ✅ SAM3 Text Prompts FIXED!

We've fixed the Ultralytics SAM3 CLIP tokenizer bug that prevented text prompts from working!

### 🔑 SAM3 Pro Licensing (NEW!)

GeoOSAM now offers a **Free Tier** and **Pro Tier** for SAM3 features:

- **Free Tier:** SAM3 text prompts and similar object detection on **Visible Extent (AOI)** - unlimited
- **Pro Tier:** SAM3 text prompts and similar object detection on **Entire Raster** - requires license key
- **License Management:** Built-in dialog for easy activation
- **Offline Validation:** Works without internet connection
- **Contact:** geoosamplugin@gmail.com to purchase a Pro license

### 🛑 Cancel Button for Tiled Processing (NEW!)

- **Cancel long-running operations:** Stop SAM3 tiled processing at any time
- **Smart undo tracking:** Partial results added to undo stack when cancelled
- **Clean UI:** Cancel button replaces undo button during processing
- **One-click abort:** Red cancel button appears during large raster processing

**Before v1.3:**
```
❌ Text prompts: NOT WORKING
   TypeError: 'SimpleTokenizer' object is not callable
```

**After v1.3:**
```
✅ Text prompts: WORKING!
   Users can segment objects using natural language
```

---

## 🔧 Technical Changes

### 1. New File: `sam3_clip_fix.py`
- **Purpose:** Monkey-patch to fix Ultralytics SAM3 tokenizer bug
- **Size:** 4.4 KB
- **Auto-applies:** On plugin startup (if CLIP installed)
- **Safe:** Doesn't modify installed files, runtime-only

### 2. New File: `geo_osam_license.py`
- **Purpose:** SAM3 Pro license validation and management
- **Size:** ~8 KB
- **Features:**
  - Email-bound license key validation
  - Offline validation (no internet required)
  - QSettings integration for persistent storage
  - License status tracking

### 3. Modified: `geo_osam_dialog.py`
- **SAM3 CLIP Fix:**
  - Import and apply `sam3_clip_fix` at startup
  - Update SAM3 status comments to "FIXED"
  - Graceful fallback if fix fails to apply
- **License System Integration (~300 lines added):**
  - License dialog UI for activation/management
  - License status indicator in control panel
  - License checks in text/similar mode triggers
  - Scope selection handler with upgrade prompts
  - "Manage License" button in UI

### 4. Documentation Updates
- **README.md:**
  - Updated SAM3 status from "NOT WORKING" → "FIXED (v1.3+)"
  - Added SAM3 Pro licensing section
  - Updated test results
- **CHANGELOG_v1.3.1.md:** This file (licensing section added)
- **SAM3_CLIP_FIX_README.md:** Complete fix documentation
- **SAM3_TEST_REPORT.md:** Test results and verification

---

## 📊 Feature Status

| Feature | v1.2 | v1.3 | Change |
|---------|--------|--------|--------|
| SAM3 Auto-Segment | ✅ Works | ✅ Works | No change |
| SAM3 Text Prompts | ❌ Broken | ✅ **FIXED** | ⬆️ Now works! |
| SAM3 Exemplar Mode | ❌ Broken | ✅ **FIXED** | ⬆️ Now works! |
| SAM3 Pro Licensing | N/A | ✅ **NEW** | ⬆️ Free + Pro tiers |
| CLIP Dependency | Optional | Optional | No change |

---

## 🚀 How to Use SAM3 Text Prompts

### Prerequisites

1. **Install CLIP** (one-time setup):
```bash
pip install git+https://github.com/ultralytics/CLIP.git ftfy wcwidth
```

2. **Restart QGIS** to load the fix

### Using Text Prompts

1. **Select SAM3 model** from model dropdown
2. **Click "Text Prompt" button** in GeoOSAM panel
3. **Enter text description:** `"building"`, `"tree"`, `"car"`, etc.
4. **Click on map** to trigger segmentation
5. **SAM3 segments matching objects** automatically!

### Example Text Prompts

- `"building"` - Segment buildings
- `"red car"` - Segment red vehicles
- `"tree"` - Segment trees
- `"water"` - Segment water bodies
- `"person in white"` - Segment people wearing white

---

## 🧪 Testing

### Verify Fix Applied

On QGIS startup, check Python Console for:
```
✅ Ultralytics SAM2.1 available
🔧 Applying SAM3 CLIP tokenizer fix...
✅ SAM3 CLIP tokenizer fix applied successfully!
   Text prompts and exemplar mode should now work
```

### Test Text Prompts

```python
# In QGIS Python Console
from sam3_clip_fix import check_sam3_text_available

if check_sam3_text_available():
    print("✅ SAM3 text features ready!")
else:
    print("❌ Install CLIP: pip install git+https://github.com/ultralytics/CLIP.git")
```

---

## ⚠️ Known Limitations

1. **CLIP Required:** Text prompts only work if CLIP is installed
2. **GPU Recommended:** SAM3 works best with GPU (>3GB VRAM)
3. **Experimental:** Open-vocabulary segmentation is complex, may not be perfect
4. **Ultralytics Bugs:** Other bugs may exist in SAM3's grounding pipeline

---

## 📝 Upgrade Guide

### From v1.2 → v1.3

**No breaking changes!** Just update and optionally install CLIP:

1. **Update plugin:**
   - QGIS Plugin Manager → Check for updates
   - Or: `git pull` (if using GitHub version)

2. **Install CLIP** (if you want text prompts):
```bash
pip install git+https://github.com/ultralytics/CLIP.git ftfy wcwidth
```

3. **Restart QGIS**

4. **Test:** See "Text Prompts" mode in GeoOSAM panel!

---

## 🐛 Bug Fixes

### Fixed: SAM3 CLIP Tokenizer Bug
- **Issue:** `TypeError: 'SimpleTokenizer' object is not callable`
- **Root Cause:** Ultralytics tried to call SimpleTokenizer instance as function
- **Fix:** Use `clip.tokenize()` function instead via monkey-patch
- **File:** `sam3_clip_fix.py`
- **Status:** ✅ Tested and verified working

---

## 📚 Documentation

### New Documentation Files

1. **SAM3_CLIP_FIX_README.md** - Complete fix documentation
   - What the fix does
   - How it works
   - Testing procedures
   - Troubleshooting

2. **SAM3_TEST_REPORT.md** - Test results
   - Comprehensive testing on 2025-12-26
   - Auto-segment: ✅ PASS (5 objects detected)
   - Text prompts: ❌ FAIL → ✅ FIXED
   - Exemplar mode: ❌ FAIL → ✅ FIXED

3. **docs/SAM3_IMPLEMENTATION_OPTIONS.md** - Meta SAM3 comparison
   - Comparison: Ultralytics vs Meta original SAM3
   - Future migration path to Meta SAM3
   - Requirements and compatibility

---

## 🔄 Backward Compatibility

✅ **Fully backward compatible!**

- Users without CLIP: Auto-segment still works
- Existing workflows: No changes needed
- Fix is optional: Gracefully degrades if CLIP not installed

---

## 🙏 Credits

- **Fix Developed:** GeoOSAM Contributors
- **Tested:** 2025-12-26, Python 3.10, Ultralytics 8.3.240
- **Original Bug Report:** https://github.com/ultralytics/ultralytics/issues/22647

---

## 📦 Files Changed

### Modified Files
```
M  geo_osam_dialog.py       (11 lines changed - import fix, update status)
M  README.md                (status updates: BROKEN → FIXED)
M  metadata.txt             (changelog update)
M  docs/installation.md     (CLIP installation notes)
```

### New Files
```
A  sam3_clip_fix.py                     (4.4 KB - the fix!)
A  SAM3_CLIP_FIX_README.md              (5.8 KB - fix documentation)
A  SAM3_TEST_REPORT.md                  (6.7 KB - test results)
A  docs/SAM3_IMPLEMENTATION_OPTIONS.md  (11 KB - Meta SAM3 comparison)
A  CHANGELOG_v1.3.1.md                  (this file)
```

---

## 🚀 Release Checklist

- [x] CLIP fix developed and tested
- [x] License system implemented
- [x] Documentation written
- [x] Code integrated into geo_osam_dialog.py
- [x] Backward compatibility verified
- [x] Test cases documented
- [x] README.md updated
- [ ] Git commit with changelog
- [ ] Release announcement
- [ ] Submit to QGIS Plugin Repository

---

## 📅 Next Steps

1. **Test in QGIS:** Full integration testing
2. **Commit changes:** Git commit with changelog
3. **Release:** Push to plugin repository
4. **Announce:** Update documentation, notify users

---

**Happy Segmenting! 🎉**

SAM3 text prompts and Pro features are now at your fingertips in GeoOSAM v1.3!
