Class LTXVHDRDecodePostprocess

hdr.py:88–245

Decompress HDR from VAE output, tonemap for preview, optionally save EXR. Place after VAE Decode in an HDR IC-LoRA workflow. Recovers linear HDR values from the compressed latent space and tonemaps them to SDR for display. When ``save_exr`` is enabled, also writes the raw linear HDR

@comfy_node(name="LTXVHDRDecodePostprocess")
class LTXVHDRDecodePostprocess:
    """Decompress HDR from VAE output, tonemap for preview, optionally save EXR.

    Place after VAE Decode in an HDR IC-LoRA workflow. Recovers linear HDR
    values from the compressed latent space and tonemaps them to SDR for
    display. When ``save_exr`` is enabled, also writes the raw linear HDR
    frames as an EXR image sequence.
    make sure to set OPENCV_IO_ENABLE_OPENEXR=1 environment in the command line  # Must be set before cv2 import


    Outputs:
        tonemapped: SDR preview [0, 1] after Reinhard tonemap + sRGB gamma.
        hdr_linear: Raw linear HDR values [0, inf) for further processing.
    """

    @classmethod
    def INPUT_TYPES(s):
        return {
            "required": {
                "image": ("IMAGE",),
            },
            "optional": {
                "exposure": (
                    "FLOAT",
                    {
                        "default": 0.0,
                        "min": -10.0,
                        "max": 10.0,
                        "step": 0.1,
                        "display": "slider",
                        "tooltip": (
                            "Exposure in stops (EV). 0 = no change, "
                            "+1 = 2x brighter, -1 = half brightness."
                        ),
                    },
                ),
                "save_exr": (
                    "BOOLEAN",
                    {
                        "default": False,
                        "tooltip": "Save raw linear HDR frames as EXR sequence.",
                    },
                ),
                "output_dir": (
                    "STRING",
                    {
                        "default": "output/hdr_exr",
                        "tooltip": (
                            "Directory for EXR frames (relative to ComfyUI "
                            "output directory, or absolute path)."
                        ),
                    },
                ),
                "filename_prefix": (
                    "STRING",
                    {"default": "frame"},
                ),
                "half_precision": (