diff --git a/msteg/__init__.pyc b/msteg/__init__.pyc
index 6fc0478..a997d19 100644
Binary files a/msteg/__init__.pyc and b/msteg/__init__.pyc differ
diff --git a/msteg/steganalysis/MPB.py b/msteg/steganalysis/MPB.py
index 15cc8fc..483c14d 100644
--- a/msteg/steganalysis/MPB.py
+++ b/msteg/steganalysis/MPB.py
@@ -7,9 +7,11 @@ import time
 import math
 import numpy as np
 
-from .. import *
-from ...mjpeg import Jpeg,colorMap
-from ...common import *
+# from .. import *
+import mjpeg
+from msteg import *
+from mjpeg import Jpeg, colorMap
+from common import *
 
 import csv
 import json
@@ -43,14 +45,14 @@ class MPB(StegBase):
         :param T: signed integer, usually 1~7
         :return: TPM - 3-D tensor, numpy array of size (2*T+1, 2*T+1, 4)
         """
-        ciq = np.absolute(ciq).clip(0, T)
+        ciq = np.absolute(ciq)
         TPM = np.zeros((2 * T + 1, 2 * T + 1, 4), np.float64)
         # Fh = np.diff(ciq, axis=-1)
         # Fv = np.diff(ciq, axis=0)
-        Fh = ciq[:-1, :-1] - ciq[:-1, 1:]
-        Fv = ciq[:-1, :-1] - ciq[1:, :-1]
-        Fd = ciq[:-1, :-1] - ciq[1:, 1:]
-        Fm = ciq[:-1, 1:] - ciq[1:, :-1]
+        Fh = (ciq[:-1, :-1] - ciq[:-1, 1:]).clip(-T, T)
+        Fv = (ciq[:-1, :-1] - ciq[1:, :-1]).clip(-T, T)
+        Fd = (ciq[:-1, :-1] - ciq[1:, 1:]).clip(-T, T)
+        Fm = (ciq[:-1, 1:] - ciq[1:, :-1]).clip(-T, T)
 
         Fh1 = Fh[:-1, :-1]
         Fh2 = Fh[:-1, 1:]
@@ -101,14 +103,21 @@ class MPB(StegBase):
 
 
         # timer = Timer()
-        ciq = np.absolute(ciq).clip(0, T)
+        # ciq = np.absolute(ciq).clip(0, T) # Fool !!!
+        ciq = np.absolute(ciq)
         TPM = np.zeros((2 * T + 1, 2 * T + 1, 4), np.float64)
         # Fh = np.diff(ciq, axis=-1)
         # Fv = np.diff(ciq, axis=0)
-        Fh = ciq[:-1, :-1] - ciq[:-1, 1:]
-        Fv = ciq[:-1, :-1] - ciq[1:, :-1]
-        Fd = ciq[:-1, :-1] - ciq[1:, 1:]
-        Fm = ciq[:-1, 1:] - ciq[1:, :-1]
+
+        # Fh = ciq[:-1, :-1] - ciq[:-1, 1:]
+        # Fv = ciq[:-1, :-1] - ciq[1:, :-1]
+        # Fd = ciq[:-1, :-1] - ciq[1:, 1:]
+        # Fm = ciq[:-1, 1:] - ciq[1:, :-1]
+
+        Fh = (ciq[:-1, :-1] - ciq[:-1, 1:]).clip(-T, T)
+        Fv = (ciq[:-1, :-1] - ciq[1:, :-1]).clip(-T, T)
+        Fd = (ciq[:-1, :-1] - ciq[1:, 1:]).clip(-T, T)
+        Fm = (ciq[:-1, 1:] - ciq[1:, :-1]).clip(-T, T)
 
         Fh1 = Fh[:-1, :-1].ravel()
         Fh2 = Fh[:-1, 1:].ravel()
@@ -135,7 +144,7 @@ class MPB(StegBase):
         # 1.459668s
         # timer.mark()
         # for i in range(len(Fh1)):
-        #     TPM[Fh1[i], Fh2[i], 0] += 1
+        # TPM[Fh1[i], Fh2[i], 0] += 1
         # for i in range(len(Fv1)):
         #     TPM[Fv1[i], Fv2[i], 1] += 1
         # for i in range(len(Fd1)):
diff --git a/msteg/steganalysis/MPB.pyc b/msteg/steganalysis/MPB.pyc
index e99c559..90c866a 100644
Binary files a/msteg/steganalysis/MPB.pyc and b/msteg/steganalysis/MPB.pyc differ
diff --git a/msteg/steganography/F3.pyc b/msteg/steganography/F3.pyc
index cf85a0a..365bb2c 100644
Binary files a/msteg/steganography/F3.pyc and b/msteg/steganography/F3.pyc differ
diff --git a/msteg/steganography/LSB.pyc b/msteg/steganography/LSB.pyc
index f5ae787..4c17fe3 100644
Binary files a/msteg/steganography/LSB.pyc and b/msteg/steganography/LSB.pyc differ
diff --git a/res/lopez5.jpg b/res/lopez5.jpg
new file mode 100644
index 0000000..3aa6e1d
Binary files /dev/null and b/res/lopez5.jpg differ
--
libgit2 0.21.2