Video Experimental Relacionado
Updated: Sep 10, 2025
11:00
Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
Published on: July 19, 2016
11.7K
Análisis de la transformación de onda de números enteros híbridos y la descomposición del valor singular para la
Manikandan Chinnusami1, Dyutisri Kolli2, S Shreela1
1School of Electrical & Electronics Engineering, SASTRA Deemed University, Thanjavur, 613 401, India.
Scientific reports
|August 27, 2025
Resumen
Este estudio introduce un nuevo método híbrido para la esteganografía segura de imágenes, combinando la transformación de onda entera y la descomposición de valor singular. La técnica ofrece una alta imperceptibilidad y robustez frente al ruido, garantizando una transmisión de imagen segura.
Área de la Ciencia:
- Ciencias de la computación
- Seguridad de la información
- Procesamiento de imágenes digitales
Sus antecedentes:
- La esteganografía es crucial para la transmisión segura de datos.
- Los métodos existentes a menudo luchan con la robustez contra el ruido y el mantenimiento de la imperceptibilidad.
- Se necesitan técnicas avanzadas para integrar la información de forma segura en las imágenes.
Objetivo del estudio:
- Desarrollar un método esteganográfico híbrido utilizando la transformación de ondas enteras (IWT) y la descomposición de valores singulares (SVD).
- Para mejorar la imperceptibilidad y la robustez de las imágenes ocultas dentro de una imagen de portada.
- Proporcionar una plataforma fácil de usar para evaluar el rendimiento esteganográfico en diversas condiciones.
Principales métodos:
- Un enfoque híbrido que combina la transformación de onda entera (IWT) y la descomposición de valor singular (SVD).
- Desarrollo de una interfaz gráfica de usuario (GUI) personalizada para la evaluación interactiva del rendimiento.
- Prueba de la resistencia de la imagen stego a varios tipos de ruido (gaussiano, de manchas, sal y pimienta).
Principales resultados:
- Se ha logrado una alta imperceptibilidad con un error cuadrado medio (MSE) de 9,6698.
- Robustez demostrada con una tasa de error de bits (BER) de 0,7205.
- Medición de alto índice de similitud estructural (SSIM) y correlación cruzada normalizada (NCC) cercana a 1, y una relación pico señal-ruido (PSNR) de 29,5665 dB.
Conclusiones:
- El método híbrido propuesto supera las técnicas actuales en robustez e imperceptibilidad.
- La técnica es adecuada para la transmisión segura de imágenes en aplicaciones críticas como la defensa y las imágenes médicas.
- La plataforma desarrollada facilita la investigación esteganográfica reproducible y los avances futuros.
Videos de Conceptos Relacionados
01:10Reconstruction of Signal using Interpolation
335
Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
335
01:24Convolution: Math, Graphics, and Discrete Signals
396
In any LTI (Linear Time-Invariant) system, the convolution of two signals is denoted using a convolution operator, assuming all initial conditions are zero. The convolution integral can be divided into two parts: the zero-input or natural response and the zero-state or forced response, with t0 indicating the initial time.
To simplify the convolution integral, it is assumed that both the input signal and impulse response are zero for negative time values. The graphical convolution process...
To simplify the convolution integral, it is assumed that both the input signal and impulse response are zero for negative time values. The graphical convolution process...
396
01:20Downsampling
251
When considering a sampled sequence with zero values between sampling instants, one can replace it by taking every N-th value of the sequence. At these integer multiples of N, the original and sampled sequences coincide. This process, known as decimation, involves extracting every N-th sample from a sequence, thereby creating a more efficient sequence.
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...
The Fourier transform of the decimated sequence reveals a combination of scaled and shifted versions of the original spectrum. This...
251
01:08IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations
1.2K
Identical bonds within a polyatomic group can stretch symmetrically (in-phase) or asymmetrically (out-of-phase). Similar to hydrogen bonding, these vibrations also influence the shape of the IR peak. Generally, asymmetric stretching frequencies are higher than symmetric stretching frequencies. For example, primary amines exhibit two distinct IR peaks between 3300–3500 cm−1 corresponding to the symmetric and asymmetric N-H stretching, while secondary amines exhibit a single...
1.2K
01:20Deconvolution
247
Deconvolution, also known as inverse filtering, is the process of extracting the impulse response from known input and output signals. This technique is vital in scenarios where the system's characteristics are unknown, and they must be inferred from the observable signals.
Deconvolution involves several mathematical techniques to derive the impulse response. One common approach is polynomial division. In this method, the input and output sequences are treated as coefficients of...
Deconvolution involves several mathematical techniques to derive the impulse response. One common approach is polynomial division. In this method, the input and output sequences are treated as coefficients of...
247
01:14Extraction: Partition and Distribution Coefficients
2.9K
The distribution law or Nernst's distribution law is the law that governs the distribution of a solute between two immiscible solvents. This law, also known as the partition law, states that if a solute is added to the mixture of two immiscible solvents at a constant temperature, the solute is distributed between the two solvents in such a way that the ratio of solute concentrations in the solvents remains constant at equilibrium.
For extracting a solute from an aqueous phase into an...
For extracting a solute from an aqueous phase into an...
2.9K