feat: 投影法波谷检测+白底硬切断+帧底部对齐+gifmaker透明GIF

- prompt_agent: 精灵表/瓦片集间隙从2-4px放宽到8-16px纯白
- splitsprite removeWhiteBg: dist<threshold/2直接A=0，消除半透明残留
- splitsprite findCuts: 波峰-波谷检测替代死阈值，归并原阈值回退
- splitsprite alignCenter: 全局画布底部对齐替代独立居中，人物不跳帧
- splitsprite MinFillRatio 调至0.14，MinGapWidth调至2
- 新增 pkg/gifmaker: 统一画布+透明索引0+DisposalBackground
- test_prompt_to_gif 改用gifmaker包

This commit is contained in:

Gmaker689

2026-05-25 17:57:01 +08:00

parent f3dfcd3b0b

commit 8309d32d4b

5 changed files with 263 additions and 103 deletions

.gitignore

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@@ -27,3 +27,4 @@ backend/main
 # Generated output
 generation/
 backend/test_output/
 backend/test_prompt_to_gif