imagetoarraypreprocessor.py

"""
 " License:
 " -----------------------------------------------------------------------------
 " Copyright (c) 2018, Ratnajit Mukherjee.
 " All rights reserved.
 "
 " Redistribution and use in source and binary forms, with or without
 " modification, are permitted provided that the following conditions are met:
 "
 " 1. Redistributions of source code must retain the above copyright notice,
 "    this list of conditions and the following disclaimer.
 "
 " 2. Redistributions in binary form must reproduce the above copyright notice,
 "    this list of conditions and the following disclaimer in the documentation
 "    and/or other materials provided with the distribution.
 "
 " 3. Neither the name of the copyright holder nor the names of its contributors
 "    may be used to endorse or promote products derived from this software
 "    without specific prior written permission.
 "
 " THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 " AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 " IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 " ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 " LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 " CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 " SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 " INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 " CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 " ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 " POSSIBILITY OF SUCH DAMAGE.
 " -----------------------------------------------------------------------------
 "
 " Description: Originally written to preprocess HDF5 files holding training, validation, and test images
 " by Arian Rosebrock
 " Creation date: June 2017
 " URL: https://www.pyimagesearch.com/
 "
 " Integrated into an emotion detection application by:
 " Author: Ratnajit Mukherjee, ratnajitmukherjee@gmail.com
 " Date: July 2018
"""

from keras.preprocessing.image import img_to_array


class ImageToArrayPreprocessor:
    def __init__(self, dataFormat=None):
        # store the image data format
        self.dataFormat = dataFormat

    def preprocess(self, image):
        # apply the Keras utility function that correctly rearranges
        # the dimensions of the image
        return img_to_array(image, data_format=self.dataFormat)