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jxie pushed a commit to branch vision
in repository https://gitbox.apache.org/repos/asf/incubator-mxnet.git
commit 1873367e17f5e4f434bd4f458bd0e426770be183
Author: Xingjian Shi <xsh...@ust.hk>
AuthorDate: Tue Nov 21 11:07:21 2017 -0800
add test script
---
test_new_image_loader.py | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/test_new_image_loader.py b/test_new_image_loader.py
new file mode 100644
index 0000000..296869e
--- /dev/null
+++ b/test_new_image_loader.py
@@ -0,0 +1,34 @@
+import os
+os.environ['MXNET_CPU_WORKER_NTHREADS'] = '1'
+os.environ['OMP_NUM_THREADS'] = '1'
+import time
+import numpy as np
+import multiprocessing as mp
+import mxnet as mx
+from mxnet import gluon as gl
+from mxnet.gluon.data.vision import transforms
+
+if __name__ == '__main__':
+ M = 24
+ BS = 100
+
+ dataset = gl.data.vision.ImageFolderDataset('../256_ObjectCategories')
+ transform = transforms.Compose([transforms.ToTensor(),
+
transforms.RandomBrightness(1.0),
+
transforms.RandomContrast(1.0),
+
transforms.RandomSaturation(1.0),
+
transforms.Normalize([0, 0, 0], [1, 1, 1])])
+ dataset = dataset.transform_first(lambda x:
transform(mx.image.center_crop(x, (224, 224))[0]))
+ data_loader = gl.data.DataLoader(dataset, BS, shuffle=True,
num_workers=M)
+
+ N = len(dataset)
+
+ iterator = iter(data_loader)
+
+ tic = time.time()
+
+ for data, label in iterator:
+ data.wait_to_read()
+ print(data.shape)
+
+ print(N/(time.time() - tic))
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