Python mxnet.gluon.data.Dataset() Examples

The following are 5 code examples of mxnet.gluon.data.Dataset(). You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may also want to check out all available functions/classes of the module mxnet.gluon.data , or try the search function .
Example #1
Source File: utils.py    From d2l-zh with Apache License 2.0 5 votes vote down vote up 
def download_voc_pascal(data_dir='../data'):
    """Download the Pascal VOC2012 Dataset."""
    voc_dir = os.path.join(data_dir, 'VOCdevkit/VOC2012')
    url = ('http://host.robots.ox.ac.uk/pascal/VOC/voc2012'
           '/VOCtrainval_11-May-2012.tar')
    sha1 = '4e443f8a2eca6b1dac8a6c57641b67dd40621a49'
    fname = gutils.download(url, data_dir, sha1_hash=sha1)
    with tarfile.open(fname, 'r') as f:
        f.extractall(data_dir)
    return voc_dir
Example #2
Source File: utils.py    From d2l-zh with Apache License 2.0 5 votes vote down vote up 
def voc_label_indices(colormap, colormap2label):
    """Assign label indices for Pascal VOC2012 Dataset."""
    colormap = colormap.astype('int32')
    idx = ((colormap[:, :, 0] * 256 + colormap[:, :, 1]) * 256
           + colormap[:, :, 2])
    return colormap2label[idx]
Example #3
Source File: utils.py    From d2l-zh with Apache License 2.0 5 votes vote down vote up 
def voc_rand_crop(feature, label, height, width):
    """Random cropping for images of the Pascal VOC2012 Dataset."""
    feature, rect = image.random_crop(feature, (width, height))
    label = image.fixed_crop(label, *rect)
    return feature, label
Example #4
Source File: utils.py    From d2l-zh with Apache License 2.0 5 votes vote down vote up 
def download_voc_pascal(data_dir='../data'):
    """Download the Pascal VOC2012 Dataset."""
    voc_dir = os.path.join(data_dir, 'VOCdevkit/VOC2012')
    url = ('http://host.robots.ox.ac.uk/pascal/VOC/voc2012'
           '/VOCtrainval_11-May-2012.tar')
    sha1 = '4e443f8a2eca6b1dac8a6c57641b67dd40621a49'
    fname = gutils.download(url, data_dir, sha1_hash=sha1)
    with tarfile.open(fname, 'r') as f:
        f.extractall(data_dir)
    return voc_dir
Example #5
Source File: utils.py    From d2l-zh with Apache License 2.0 5 votes vote down vote up 
def voc_label_indices(colormap, colormap2label):
    """Assign label indices for Pascal VOC2012 Dataset."""
    colormap = colormap.astype('int32')
    idx = ((colormap[:, :, 0] * 256 + colormap[:, :, 1]) * 256
           + colormap[:, :, 2])
    return colormap2label[idx]