bug in calculations

app.py

@@ -2,15 +2,17 @@ import numpy as np
 
 import gradio as gr
 
-def quantize(val, n):
-    return (np.round(n * val / 255) * 255).astype(np.uint8)
+def quantize(val, factor):
+    quantized = (np.round(factor * np.array(val / 255)) * (255 / factor)).astype(int)
+    # print(val / 255, factor, factor * np.array(val / 255))
+    return quantized
 
 
-def sepia(n, input_img):
-    output_img = [quantize(val, n) for val in input_img]
+def sepia(factor, input_img):
+    output_img = [quantize(np.array(val), factor) for val in input_img]
     return output_img
 
 
-iface = gr.Interface(sepia, ["number", "image"], "pil")
+iface = gr.Interface(sepia, [gr.inputs.Slider(1, 10, 1), "image"], "pil")
 
 iface.launch()