diff --git a/requirements.txt b/requirements.txt
index c5f254c..9bd8876 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,3 +13,5 @@ onnxruntime
 
 streamlit==1.30
 streamlit-paste-button
+
+easyocr
diff --git a/src/inference.py b/src/inference.py
index bc7c006..127537e 100644
--- a/src/inference.py
+++ b/src/inference.py
@@ -6,7 +6,6 @@ from pathlib import Path
 from utils import to_katex
 from models.ocr_model.utils.inference import inference as latex_inference
 from models.ocr_model.model.TexTeller import TexTeller
-from utils import load_det_tex_model, load_lang_models
 
 
 if __name__ == '__main__':
diff --git a/src/utils/__init__.py b/src/utils/__init__.py
new file mode 100644
index 0000000..ba17b40
--- /dev/null
+++ b/src/utils/__init__.py
@@ -0,0 +1 @@
+from .to_katex import to_katex
\ No newline at end of file
diff --git a/src/utils.py b/src/utils/to_katex.py
similarity index 55%
rename from src/utils.py
rename to src/utils/to_katex.py
index 7822a76..fe08a74 100644
--- a/src/utils.py
+++ b/src/utils/to_katex.py
@@ -1,9 +1,6 @@
 import numpy as np
 import re
 
-from models.ocr_model.utils.inference import inference as latex_inference
-
-
 def to_katex(formula: str) -> str:
     res = formula
     res = re.sub(r'\\mbox\{([^}]*)\}', r'\1', res)
@@ -16,19 +13,3 @@ def to_katex(formula: str) -> str:
     if res.endswith(r'\newline'):
         res = res[:-8]
     return res
-
-
-def load_lang_models(language: str):
-    ...
-    # language: 'ch' or 'en'
-    # return det_model, rec_model (or model)
-
-
-def load_det_tex_model():
-    ...
-    # return the loaded latex detection model
-
-
-def mix_inference(latex_det_model, latex_rec_model, lang_model, img: np.ndarray, use_cuda: bool) -> str:
-    ...
-    # latex_inference(...)