[Example] Fix SD crash in multi-instances (#390)

Author: Lu Teng

example/sdxl/inference.py

@@ -127,6 +127,6 @@ def nrmse(source, target):
     return 1 - rmse / 255
 
 if args.accuracy:
-    source = np.array(Image.open("castle.png"))
+    source = np.array(images[0])
     target = np.array(Image.open("target.png"))
     print("RMSE accuracy is: {:.3f}".format(nrmse(source, target)), file=sys.stderr)

example/stable_diffusion/jax_stable.py

@@ -111,6 +111,6 @@ def nrmse(source, target):
     return 1 - rmse / 255
 
 if args.accuracy:
-    source = np.array(Image.open("img.png"))
+    source = np.array(images[0])
     target = np.array(Image.open("target.png"))
     print("RMSE accuracy is: {:.3f}".format(nrmse(source, target)), file=sys.stderr)