Subjects: DISCRETE cosine transforms; COSINE function; DISCRETE wavelet transforms
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Subjects: PIXELS; DISCRETE cosine transforms; IMAGE converters
Subjects: IMAGE encryption; IMAGE compression; DISCRETE cosine transforms
Subjects: SINGULAR value decomposition; PARTICLE swarm optimization; MATHEMATICAL optimization
Subjects: IMAGE encryption; DIGITAL image processing; DISCRETE cosine transforms
Subjects: DATA encryption; IMAGE analysis; DISCRETE cosine transforms