This package provides frequency-domain image processing nodes for ComfyUI, including FFT/IFFT transforms, frequency filters, convolution, deconvolution, spectrum visualization, and educational sample workflows.

Features

2D FFT / IFFT
Frequency-domain filtering
FFT-based image resize
Low / High frequency crossover
5-band graphic equalizer
Frequency masking
Convolution and Wiener deconvolution
Magnitude and phase preview

Included Nodes

Transform

Image FFT (2D)
Image IFFT (2D)

Filters

FFT Based Resize
FFT Crossover (Low/High)
FFT Graphic EQ (5-band)
FFT Radial Mask (Generate)

Math

FFT Add
FFT Subtract
FFT Multiply
FFT Divide (Wiener)

Preview

FFT Magnitude Preview
FFT Phase Preview

Util

PSF Normalize (Auto-center)
CZP (Generate)

Sample Workflows

Sample input images are included in the examples folder. Copy them to your ComfyUI input folder.

Lesson 1. FFT → IFFT

Workflow1

Lesson 2. FFT-based Resize

Workflow2

Lesson 3. Band-pass Filter

Workflow3

Lesson 4. Low / High Frequency Split

Workflow4

Lesson 5. Frequency Masking

Workflow5

Lesson 6. Convolution

Workflow6

Lesson 7. Deconvolution

Workflow7

Installation

Clone this repository into your ComfyUI custom_nodes folder.

ComfyUI/
└── custom_nodes/
    └── comfyui-fft-2d/

Restart ComfyUI after installation.

FREQUENCY Data Type

This node pack introduces a new custom data type:

IMAGE
   ↓ FFT
FREQUENCY
   ↓ processing
IMAGE

The zero-frequency component is always located at the center of the spectrum.

License

MIT License