منابع مشابه
Image Classification by Lifting Wavelet Pca
An image classification method based on the lifting wavelet and PCA is proposed. First, several training images chosen from given classes are decomposed into low-pass and high-pass images by using wavelet transform. Applying PCA to all the low-pass images, principal component vectors are computed. The feature vectors of low-pass images are constructed by expanding the low-pass images with respe...
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an ideal fusion method preserves the spectral information in fused image without spatial distortion. the pca is believed to be a well-known pan-sharpening approach and being widely used for its efficiency and high spatial resolution. however, it can distort the spectral characteristics of multispectral images. the current paper tries to present a new fusion method based on the same concept. in ...
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In recent years, the advancement of digital technology has led to an increase in data transmission on the Internet. Security of images is one of the biggest concern of many researchers. Therefore, numerous algorithms have been presented for image encryption. An efficient encryption algorithm should have high security and low search time along with high complexity.DNA encryption is one of the fa...
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Principal component analysis (PCA) is an orthogonal transformation that seeks the directions of maximum variance in the data and is commonly used to reduce the dimensionality of the data. In image denoising, a compromise has to be found between noise reduction and preserving significant image details. PCA is a statistical technique for simplifying a dataset by reducing datasets to lower dimensi...
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We present multiple-image encryption (MIE) based on compressive holography. In the encryption, a holographic technique is employed to record multiple images simultaneously to form a hologram. The two-dimensional Fourier data of the hologram are then compressed by nonuniform sampling, which gives rise to compressive encryption. Decryption of individual images is cast into a minimization problem....
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ژورنال
عنوان ژورنال: Communications on Applied Electronics
سال: 2015
ISSN: 2394-4714
DOI: 10.5120/cae2015651893