def _series_uniform(self):
        """Return all images in file as single series."""
        page = self.pages[0]
        shape = page.shape
        axes = page.axes
        dtype = page.dtype
        validate = not (page.is_scanimage or page.is_nih)
        pages = self.pages._getlist(validate=validate)
        lenpages = len(pages)
        if lenpages > 1:
            shape = (lenpages,) + shape
            axes = 'I' + axes
        if page.is_scanimage:
            kind = 'ScanImage'
        elif page.is_nih:
            kind = 'NIHImage'
        else:
            kind = 'Uniform'
        return [TiffPageSeries(pages, shape, dtype, axes, kind=kind)]
Return all images in file as single series.