Noise

Add uniform noise in matlab

The following Matlab project contains the source code and Matlab examples used for add uniform noise. addnoise(A,sz) A: image matrix sz: noise ratio (0 to 100) of the image This function take an image and noise ratio then output a grayscaled image with uniform noise. The uniform noise ranged from 0 to 255.

Probability of error for sequence in awgn and awgn+rayleigh channel, confrontation in matlab

The following Matlab project contains the source code and Matlab examples used for probability of error for sequence in awgn and awgn+rayleigh channel, confrontation. Probability of error for sequence in AWGN and AWGN+Rayleigh channel, confrontation between the two probability. Rayleigh channel is considered as slow fading

Add noise in matlab

The following Matlab project contains the source code and Matlab examples used for add noise. Takes two signal vectors as inputs and produces a mixture signal at a desired SNR level (dB). Includes various examples.

Pink, red, blue and violet noise generation with matlab implementation

The following Matlab project contains the source code and Matlab examples used for pink, red, blue and violet noise generation with matlab implementation. The present submission is a set of four Matlab functions that provides a generation of: 1) Pink (flicker) noise - power spectral density -3 dB/oct 2) Red (brown(ian)) noise - power spectral density -6 dB/oct 3) Blue noise - power spectral density +3 dB/oct 4) Violet (purple) noise - power spectral density +6 dB/oct A brief example is given to clarify the usage of the functions.

Generation of audio test signals with matlab implementation

The following Matlab project contains the source code and Matlab examples used for generation of audio test signals with matlab implementation. The present submission is a set of seven Matlab functions that provides a generation of wave packets of: 1) Sine wave signal 2) Square wave signal 3) Chirp signal 4) Pink noise signal 5) White noise signal 6) Sinc wave signal (sin(x)/x) (as odd or even function) Each function passes the generated signal to the analog output of the sound card so one can use it for acoustic, audio or other measurements.

Psnr of image in matlab

The following Matlab project contains the source code and Matlab examples used for psnr of image. Peak signal-to-noise ratio, often abbreviated PSNR, is an engineering term for the ratio between the maximum possible power of a signal and the power of corrupting noise that affects the fidelity of its representation.

Add salt or pepper or random valued impulse noise to image in matlab

The following Matlab project contains the source code and Matlab examples used for add salt or pepper or random valued impulse noise to image. % Add salt or pepper noise to image of certain density % image_noisy = pepperOrSalt(image_orig, ND, type_noise, min_val, max_val) % image_noisy = image after adding salt or pepper or both salt and pepper noise % image_orig = image after adding salt or pepper or both salt and pepper noise % ND = noise density, default value is 0.

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