def get_rgb_image_()

in threestudio/utils/saving.py [0:0]


    def get_rgb_image_(self, img, data_format, data_range, rgba=False):
        img = self.convert_data(img)
        assert data_format in ["CHW", "HWC"]
        if data_format == "CHW":
            img = img.transpose(1, 2, 0)
        if img.dtype != np.uint8:
            img = img.clip(min=data_range[0], max=data_range[1])
            img = (
                (img - data_range[0]) / (data_range[1] - data_range[0]) * 255.0
            ).astype(np.uint8)
        nc = 4 if rgba else 3
        imgs = [img[..., start : start + nc] for start in range(0, img.shape[-1], nc)]
        imgs = [
            img_
            if img_.shape[-1] == nc
            else np.concatenate(
                [
                    img_,
                    np.zeros(
                        (img_.shape[0], img_.shape[1], nc - img_.shape[2]),
                        dtype=img_.dtype,
                    ),
                ],
                axis=-1,
            )
            for img_ in imgs
        ]
        img = np.concatenate(imgs, axis=1)
        if rgba:
            img = cv2.cvtColor(img, cv2.COLOR_RGBA2BGRA)
        else:
            img = cv2.cvtColor(img, cv2.COLOR_RGB2BGR)
        return img