RGB FFT Channel Editor v2

Paste an image with Ctrl+V or upload one from your device. The page computes a full FFT of each RGB channel after row-concatenation, with no downsampling. When frequencies are deleted, conjugate partners are zeroed together so the reconstructed channel stays real-valued.

Input and controls

Paste or upload an image

Desktop: click here and paste with Ctrl+V. Mobile: tap the button below to choose an image.

Red channel

Delete this many highest-amplitude frequencies

Delete this many lowest-amplitude frequencies

Green channel

Delete this many highest-amplitude frequencies

Delete this many lowest-amplitude frequencies

Blue channel

Delete this many highest-amplitude frequencies

Delete this many lowest-amplitude frequencies

No image loaded yet.

Notes:
• Frequencies are ranked on the one-sided representative spectrum: indices 0 through ⌊N/2⌋.
• If a representative index k is deleted, index N-k is also deleted automatically, except for self-conjugate bins.
• Very large images can take a while because this computes full FFTs without downsampling.

RGB FFT Channel Editor v2

Input and controls

Red channel

Green channel

Blue channel

Images

Original image

Reconstructed image