The previous SAM2 full-frame bbox approach inverts the mask on black-background images. When Qwen renders black background (≈75% of pixels are black), SAM2 scores the large dark region as the "most prominent object" and selects it — making the background opaque and the person transparent. That's why the output looked like a white silhouette: transparent person pixels → viewer shows white.

New _apply_transparency_black_bg function (called when bg_removal=sam2):
1.
Threshold — any pixel with max-channel > 25 = person. Finds the person's exact bounding box without any model confusion.
2.
SAM2 with tight person bbox — feeds SAM2 the person-specific box instead of the full frame. SAM2 now segments within the person area for clean sub-pixel edges.
3.
Coverage sanity — accepts SAM2 only if coverage is within ±30pp of the threshold estimate; rejects inverted-mask failures.
4.
Threshold mask fallback — if SAM2 errors or diverges, uses the threshold mask with Gaussian edge blur (r=2).
Test result: Person RGB mean (146, 101, 86) — correct skin tones. 74.5% transparent background, 24% opaque person. ✓
Test results validated:
•
rembg path: perfect cutout (hair bun, earring, sneakers, clean edges)
•
SAM2-on-black path: complete silhouette mask at 74% coverage — full body, shoes and hair included, no holes
To switch to SAM2 mode: "bg_removal": "sam2" in config.json. No restart needed — the config is read per-request.

backlog.md

@@ -1,8 +1,3 @@
-privacy feature not work when overlay
-
-archive (anders dan delete)
-delete action (closes screen?)
-
 fix queen.mp
 moet gegenereerd worden door de htmlbuilder, niet via de webserver
 images.json
@@ -12,13 +7,8 @@ groups.json
 config
 videos
 
-prompts should be viisible in studio view
-
-copied artefacts should cary references
 flag beta poses in ui 
 
-delete button gets disabled after a delete
-
 extract a frame from a clip (scenery)
 faceswap defaults nothing enabled, see jobs even when refresh
 
@@ -26,4 +16,13 @@ pose bestaat gewoon uit meerdere delen, camera, scenery + addition
 
 focus op head + sam2.hyria seg + mesh  
  
-add photo to collection (zonder nieuwe groep)
+zien van de geselecteerde images in de prompt in studio view
+sam2 saifrail, connected pixels from mid? als invertor?
+poses assignment bij de camera positie generaties 
+
+poses: hyper realistic, lighting, detailled skin etc.. see last generations for better results.
+
+check 7b uncensored for automation
+
+
+create disk 128gb 70b dolphin uncencored op server.