datasets.py 文件源码

def _voc_seg_load_file(path, epochs=None, shuffle=True, seed=0):

    PASCAL_ROOT = os.environ['VOC_DIR']
    filename_queue = tf.train.string_input_producer([path],
            num_epochs=epochs, shuffle=shuffle, seed=seed)

    reader = tf.TextLineReader()
    key, value = reader.read(filename_queue)
    image_path, seg_path = tf.decode_csv(value, record_defaults=[[''], ['']], field_delim=' ')

    image_abspath = PASCAL_ROOT + image_path
    seg_abspath = PASCAL_ROOT + seg_path

    image_content = tf.read_file(image_abspath)
    image = decode_image(image_content, channels=3)
    image.set_shape([None, None, 3])

    imgshape = tf.shape(image)[:2]
    imgname = image_path

    seg_content = tf.read_file(seg_abspath)
    seg = tf.cast(tf.image.decode_png(seg_content, channels=1), tf.int32)
    return image, seg, imgshape, imgname