Inpaint Stitch Pro

Inpaint Stitch Pro is the part of the crop-and-stitch pipeline where the invisible work happens. Paste Back gives you a clean resize-and-paste; this node gives you seam-hiding that actually earns its keep - Laplacian pyramid blending (the technique Photoshop uses for panorama stitching, blending each frequency band separately), edge-aware blending, and FFT frequency-domain blending. When your inpainted region sits on textured background - fabric, hair, grass, brick - a simple paste shows up as a tell. This node is the answer to that tell.

It's the second half of the crop-and-stitch loop with Inpaint Crop Pro, in the C2C/Inpaint suite of ComfyUI-CustomNodePacks (the ~72-node pack from Code2Collapse / Likhith-24).

How it works

Feed it the stitcher from Inpaint Crop Pro and the inpainted_image from your sampler, and it places the crop back using a blend mask that fades the seam across blend_radius pixels instead of cutting it. The controls:

• blend_mode_override - the main decision. from_crop (default) honors whatever blend mode the crop node configured; or force gaussian, edge_aware (feathers along real edges via Sobel), laplacian_pyramid (the heavy hitter for textured backgrounds), frequency_blend (FFT-domain), or video_stable (a wide, temporally-smoothed blend zone for video).
• color_match (default false) - Reinhard-style mean+std color transfer before blending. This is the "the inpainted region has the right content but wrong exposure/color cast" fix. It's cheap and it kills the most common seam tell (a brightness or hue mismatch), so turn it on early.
• stitch_temporal_sigma (default 0) - post-hoc temporal Gaussian smoothing of the per-frame blend mask. This is the video knob: set 2-4 (≈9-frame window at 3) to stop a jittery per-frame mask from flickering the seam in your footage.
• stitch_dilate_px - dilates the binary core of the blend mask before temporal smoothing, pushing the seam into flat background. Use with temporal sigma on jittery video.
• roto_quality_override - the Roto-Sync seam: from_crop (default), force_on (tight-seam stitching even if the crop didn't set it), force_off.

Outputs: image (the final frame), blend_mask_used (the actual blend mask, so you can see what got composited - great for debugging a weird seam), and info.

The recipe for a first working run

image + mask → Inpaint Crop Pro → cropped_image → [sampler] → inpainted_image
                     └── stitcher ─────────────────────────────────┐
                    inpainted_image + stitcher → Inpaint Stitch Pro → final

Set blend_mode_override to laplacian_pyramid, flip color_match on, and let it rip. If a seam survives that, it's a sampling problem, not a stitching problem.

Installing it

Ships in ComfyUI-CustomNodePacks. ComfyUI Manager → search "CustomNodePacks", or:

cd ComfyUI/custom_nodes
git clone https://github.com/Code2Collapse/ComfyUI-CustomNodePacks.git

Needs the pack's standard deps (opencv-python>=4.7.0, scipy>=1.10.0) - install just what's missing (not the full requirements.txt, which can clobber ComfyUI's torch). No models. Restart ComfyUI.

Common issues

• Visible seam despite Laplacian - turn on color_match. Nine times out of ten the visible edge is a brightness/color mismatch, and a mean+std transfer fixes it where fancier blending can't.
• Seam flickers in video - that's temporal jitter in the mask. Raise stitch_temporal_sigma (2-4) and add stitch_dilate_px to push the blend zone into stable background.
• Blurry edges after blending - the blend mask is feathering too much on a region that needed to stay crisp. Drop blend_radius at the crop stage, or go back to gaussian for a tighter transition.
• The old README mentions a unified "Inpaint Composite" node - the pack has consolidated things over time; if you load a workflow referencing composite modes, check the pack's current docs. This Stitch Pro node is the standalone advanced stitch and still works as documented.

The honest take: Laplacian pyramid and FFT blending are genuinely useful tools, not marketing - and color_match is the single most underrated checkbox in the whole inpaint suite. Start with both and you'll rarely need to chase a seam again.