fix shape training

hy3dshape/minimal_demo.py

@@ -13,7 +13,6 @@
 # by Tencent in accordance with TENCENT HUNYUAN COMMUNITY LICENSE AGREEMENT.
 
 from PIL import Image
-
 from hy3dshape.rembg import BackgroundRemover
 from hy3dshape.pipelines import Hunyuan3DDiTFlowMatchingPipeline
 
@@ -21,10 +20,12 @@ model_path = 'tencent/Hunyuan3D-2.1'
 pipeline_shapegen = Hunyuan3DDiTFlowMatchingPipeline.from_pretrained(model_path)
 
 image_path = 'demos/demo.png'
+
 image = Image.open(image_path).convert("RGBA")
 if image.mode == 'RGB':
     rembg = BackgroundRemover()
     image = rembg(image)
 
+image = image_path
 mesh = pipeline_shapegen(image=image)[0]
 mesh.export('demo.glb')