Image Enhancement in Frequency Domain

tags: image processing

Fourier Transform

The formula or equation for Fourier transform is as follow: $F(\omega )=\int f(x)e^{-i2\pi \omega x}dx$ and its inverse as follow: $f(x)=\int F(\omega )e^{i2\pi \omega x}d\omega$ TODO: Fourier transform intution in the discrete space

What is negative frequency in fourier transform

The N in the discrete is to make frequency like effect $\frac{x}{N}$

multiplying by -1 every other pixel causes ftshift also try to solve the proof to get your hand going

Fourier transform is used in JPEG compression

Log Transformation and log scale ??

computer vision guys really like wavelet transform

Why is ideal pass filter bad

• Bufferworth low pass filter
• GAussian low pass filter

READ !! https://dsp.stackexchange.com/questions/52826/spectrum-of-cosine-in-complex-form

think about periodic and discrete FT