Update app.py

app.py

@@ -113,7 +113,7 @@ def extract_invoice_data(file_data, content_type, json_schema):
                 img_byte_arr = io.BytesIO()
                 img.save(img_byte_arr, format="PNG", dpi=(300, 300))
                 base64_encoded = base64.b64encode(img_byte_arr.getvalue()).decode('utf-8')
-                base64_images.append(f"data:{content_type};base64,{base64_encoded}")
+                base64_images.append(f"data:image/png;base64,{base64_encoded}")
 
         except Exception as e:
             logger.error(f"Error converting PDF to image: {e}")