Initial skills documentation — 25 categories, all SKILL.md + references + scripts

2026-07-15 17:42:20 -04:00
commit 1b4fcd4427
976 changed files with 188344 additions and 0 deletions
@@ -0,0 +1,53 @@
+# Image Background Removal & Cleanup
+
+## Quick workflow
+
+1. **Install rembg (CPU only):**
+```bash
+pip3 install "rembg[cpu]"
+```
+
+2. **Remove background:**
+```python
+from rembg import remove
+from PIL import Image
+import io
+with open('input.jpg', 'rb') as f:
+    input_data = f.read()
+output_data = remove(input_data)
+with open('output.png', 'wb') as f:
+    f.write(output_data)
+```
+
+3. **Clean semi-transparent artifacts** (removes ghost pixels not touching opaque edges):
+```python
+pixels = np.array(Image.open('output.png').convert('RGBA'))
+alpha = pixels[:,:,3]
+opaque = alpha > 240
+semi = (alpha > 5) & (alpha < 200)
+keep = np.zeros_like(semi)
+for y in range(1, h-1):
+    for x in range(1, w-1):
+        if semi[y,x] and opaque[y-1:y+2, x-1:x+2].any():
+            keep[y,x] = True
+pixels[semi & ~keep, 3] = 0
+```
+
+4. **Upscale for smoother edges:**
+```python
+img = img.resize((w*3, h*3), Image.Resampling.LANCZOS).filter(ImageFilter.SMOOTH)
+```
+
+## Common scenarios
+
+| Problem | Pass | Approach |
+|---|---|---|
+| Near-white background | 1 | Threshold RGB > 245 all channels → alpha=0 |
+| Solid red/color bg | 1 | Euclidean distance from known RGB → alpha=0 |
+| Semi-transparent residuals | 2 | Clear semi alpha not bordering opaque |
+| Jaggies on text | 3 | Upscale 3x LANCZOS + SMOOTH |
+| Signature in corner | 2 | Mask dark pixels in bottom-right region → alpha=0 |
+
+## Capability note
+
+This server has no wired image generation toolset. For new image creation, write an Imagen prompt. For editing (bg removal, resize, signature removal, color masking), the above workflow works.