diff --git a/mdata/ILSVRC.py b/mdata/ILSVRC.py
index aefd55f..2146568 100644
--- a/mdata/ILSVRC.py
+++ b/mdata/ILSVRC.py
@@ -294,7 +294,7 @@ class DataILSVRC(DataDumperBase):
                     # img = cv2.imread(image, cv2.CV_LOAD_IMAGE_UNCHANGED)
                     # h, w = img.shape[:2]
                     # if w < 300 or h < 300:
-                    #         continue
+                    # continue
                     #     left, upper = random.randint(0, w - 300), random.randint(0, h - 300)
                     #     img_crop = img[upper:upper + 300, left:left + 300]
                     #     cv2.imwrite(os.path.join(base_dir, category + '_crop_cv', name), img_crop)
@@ -457,6 +457,7 @@ class DataILSVRC(DataDumperBase):
                             dict_dataset[hash] = (tag, im.getCoefMatrix(channel='Y'))
 
                 for tag, feat in dict_dataset.values():
+                    feat.ravel()[[i*304+j for i in range(0,304,8) for j in range(0,304,8)]] = 0
                     X.append(feat.ravel())
                     Y.append(int(tag))
 
diff --git a/mdata/ILSVRC_S.py b/mdata/ILSVRC_S.py
index 77da0da..edf4469 100644
--- a/mdata/ILSVRC_S.py
+++ b/mdata/ILSVRC_S.py
@@ -520,6 +520,7 @@ class DataILSVRC_S(DataDumperBase):
                             dict_dataset[hash] = (tag, im.getCoefMatrix(channel='Y'))
 
                 for tag, feat in dict_dataset.values():
+                    feat.ravel()[[i*304+j for i in range(0,304,8) for j in range(0,304,8)]] = 0
                     X.append(feat.tolist())
                     Y.append(int(tag))
 
--
libgit2 0.21.2