Frequency Domain
Inspect DFT magnitude, phase, and centered frequency spectrum for filtering, deblurring, and signal analysis.
Visualize the frequency content of any image using the Discrete Fourier Transform (DFT). View magnitude spectrum, phase spectrum, or both side by side. Useful for understanding image texture, periodicity, and noise patterns.
How to Use Frequency Domain
- Upload an image: Upload one of the formats listed by the tool (JPG, PNG, WebP) and wait for the local preview.
- Adjust settings and process: Adjust the available controls, then run the selected image processing workflow in your browser.
- Review and download: Review the result, then download it in one of the formats offered by this tool.
Frequently asked questions
What is frequency domain analysis?
Frequency domain analysis transforms an image from spatial representation to frequency representation using the Discrete Fourier Transform (DFT). Low frequencies correspond to smooth areas, high frequencies to edges and detail.
What do magnitude and phase show?
The magnitude spectrum shows how much of each frequency is present in the image. The phase spectrum shows the spatial arrangement of those frequencies. Both are needed to fully reconstruct the original image.
Why use log scale?
Raw DFT magnitude values span many orders of magnitude. Log scaling compresses the range so both strong and weak frequency components are visible.
Is my image uploaded?
No. Supported media processing happens in your browser using WebAssembly. Supported image content is not uploaded for processing.