Frequency Filter Playground
Spectra and reconstruction update live. DC is centered.
Upload an image
Drag & drop, click to browse, or paste (Ctrl+V). PNG/JPG/WebP.
Tip: paste an image from clipboard.
Resize & performance
Resize before FFT. Smaller sizes are faster and reduce memory.
no image
Max side
Re-upload to apply
512px
Frequency cap (bins)
Limits the displayed spectrum window and filter range
Upload an image to enable cap controls.
Overall filter
Start here. Use presets to quickly isolate bands, then fine-tune.
min 0max 128cap 128
Min
0
Max
128
1 step = 1 frequency bin. Dragging throttles reconstruction; spectra stay live.
Original
Upload to view
Reconstructed
Upload to enable
IFFT preview
Spectrum (mixed)
Upload to generate spectra
DC centered
Spectrum (R)
Upload to generate spectra
min 0max 128cap 128
Min
0
Max
128
1 step = 1 frequency bin. Dragging throttles reconstruction; spectra stay live.
Spectrum (G)
Upload to generate spectra
min 0max 128cap 128
Min
0
Max
128
1 step = 1 frequency bin. Dragging throttles reconstruction; spectra stay live.
Spectrum (B)
Upload to generate spectra
min 0max 128cap 128
Min
0
Max
128
1 step = 1 frequency bin. Dragging throttles reconstruction; spectra stay live.