diff --git a/README.md b/README.md
index cfde5e2..25eb06f 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
-# kiui kit
+# kiuikit
 
-A toolkit for personal use.
+A toolkit for computer vision (especially 3D vision) tasks.
 
 **Features**:
 * Collection of *maintained, reusable and trustworthy* code snippets.
diff --git a/kiui/nn.py b/kiui/nn.py
new file mode 100644
index 0000000..40ff1ee
--- /dev/null
+++ b/kiui/nn.py
@@ -0,0 +1,57 @@
+import torch
+import torch.nn as nn
+import torch.nn.functional as F
+
+import numpy as np
+
+class MLP(nn.Module):
+    def __init__(self, dim_in, dim_out, dim_hidden, num_layers, bias=True):
+        super().__init__()
+        self.dim_in = dim_in
+        self.dim_out = dim_out
+        self.dim_hidden = dim_hidden
+        self.num_layers = num_layers
+
+        net = []
+        for l in range(num_layers):
+            net.append(nn.Linear(self.dim_in if l == 0 else self.dim_hidden, self.dim_out if l == num_layers - 1 else self.dim_hidden, bias=bias))
+
+        self.net = nn.ModuleList(net)
+    
+    def forward(self, x):
+        for l in range(self.num_layers):
+            x = self.net[l](x)
+            if l != self.num_layers - 1:
+                x = F.relu(x, inplace=True)
+        return x
+
+class HashGrid(nn.Module):
+    def __init__(self, 
+                 input_dim=3,
+                 num_levels=16, 
+                 level_dim=2, 
+                 log2_hashmap_size=19, 
+                 base_resolution=16, 
+                 desired_resolution=2048, 
+                 interpolation='linear'
+                 ):
+        super().__init__()
+        import tinycudann as tcnn
+        self.encoder = tcnn.Encoding(
+            n_input_dims=input_dim,
+            encoding_config={
+                "otype": "HashGrid",
+                "n_levels": num_levels,
+                "n_features_per_level": level_dim,
+                "log2_hashmap_size": log2_hashmap_size,
+                "base_resolution": base_resolution,
+                "per_level_scale": np.exp2(np.log2(desired_resolution / num_levels) / (num_levels - 1)),
+                "interpolation": "Smoothstep" if interpolation == 'smoothstep' else "Linear",
+            },
+            dtype=torch.float32,
+        )
+        self.input_dim = input_dim
+        self.output_dim = self.encoder.n_output_dims # patch
+    
+    def forward(self, x, bound=1):
+        return self.encoder((x + bound) / (2 * bound))
\ No newline at end of file
diff --git a/setup.py b/setup.py
index c3d3ecf..9abdc41 100644
--- a/setup.py
+++ b/setup.py
@@ -3,7 +3,7 @@
 if __name__ == "__main__":
     setup(
         name="kiui",
-        version="0.1.9",
+        version="0.1.10",
         description="self-use toolkits",
         long_description=open("README.md", encoding="utf-8").read(),
         long_description_content_type="text/markdown",
@@ -27,6 +27,8 @@
                 "rich",
                 "numpy",
                 "scipy",
+                "scikit-image",
+                "scikit-learn",
                 "pandas",
                 "trimesh",
                 "pygltflib",
@@ -35,7 +37,6 @@
                 "opencv-python",
                 "imageio",
                 "imageio-ffmpeg",
-                "scikit-image",
                 "rembg[gpu,cli]",
                 "dearpygui",
                 'huggingface_hub',