According to the principle of scale transformation, signal expansion in the time domain corresponds to compression in the frequency domain, so that information energy is concentrated in the low frequency part.
Jan 31, 2020 · In this paper, an image enlargement algorithm based on the Discrete Cosine Transform (DCT) is proposed, which preserves the low frequency of the image.
In this paper, an image enlargement algorithm based on the Discrete Cosine Transform (DCT) is proposed, which preserves the low frequency of the image and ...
In this paper, an image enlargement algorithm based on the Discrete Cosine Transform (DCT) is proposed, which preserves the low frequency of the image.
In this paper, an image enlargement algorithm based on the Discrete Cosine Transform (DCT) is proposed, which preserves the low frequency of the image and ...
The main feature of this algorithm is that it calculates the DCT coefficients of the larger block sizes from the DCT coefficients of smaller block sizes without ...
For Image resizing by integer factor L<1, the image is first decomposed by Discrete wavelet transform or. Discrete cosine transform. The π/L coefficients are ...
In this paper, an image enhancement method based on Discrete Cosine Transforms (DCT) and Discrete Wavelet Transform (DWT) was studied.
This paper investigates a novel image enhancement technique based on statistical analysis of DCT coefficients. The proposed method treats the DC coefficient ...
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What is DCT coefficients?
How does DCT work in image processing?
They found that by discarding low-frequency DCT coefficients in the logarithm domain, the method capable of reducing the illumination variations effect ...