def METHOD_NAME(self, count):
    img_count = count % IMAGE_SHAPE[1]
    self._image_data[:, img_count] = img_count / IMAGE_SHAPE[1]
    rdata_shape = (IMAGE_SHAPE[0], IMAGE_SHAPE[1] - img_count - 1)
    self._image_data[:, img_count + 1:] = _generate_random_image_data(rdata_shape)
    return self._image_data.copy()