An novel image de-noising model based on gradient and adaptive curvature features and its application

Huang, Dan; Hu, Yueming

doi:10.1088/1402-4896/ab1d7d

Cited by 2 publications

(2 citation statements)

References 41 publications

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“…This hybrid method takes full advantage of the two combined models. Recently, more image de-noising model have been proposed in litterature as [12][13][14].…”

Section: Related Work 21 Related Work On the Restoration Of Noisy Imagesmentioning

confidence: 99%

Exploitation of second-and fourth-order PDEs to improve Lossy compression of noisy images

Welba¹,

THIERRY²,

Noura³

et al. 2023

Phys. Scr.

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This paper presents a lossy compression method for noisy images. The main contributions in this paper are : improve the performance of noisy image compression algorithms by using partial differential equations (PDEs) as an image preprocessing filter and show that it is more advantageous to apply a restoration filter before compressing noise images.Method :The preprocessing filter is applied to the noisy image first. A comparing of the obtained outcomes with those in the scientific literature devoted to the restoration of noisy images is performed. The filtered image is then submitted to a compression algorithm. The compression algorithm employed is a hybrid of the following : DWT+SPIHT+HUFFMAN. Results:The simulation results demonstrate that the suggested technique is as efficient as approaches described in the scientific literature for picture compression and/or image restoration.

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“…This hybrid method takes full advantage of the two combined models. Recently, more image de-noising model have been proposed in litterature as [12][13][14].…”

Section: Related Work 21 Related Work On the Restoration Of Noisy Imagesmentioning

confidence: 99%

Exploitation of second-and fourth-order PDEs to improve Lossy compression of noisy images

Welba¹,

THIERRY²,

Noura³

et al. 2023

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…At present, surface mounted technology (SMT) has been pervasively utilized on the high-density flexible IC substrates (FICS) in the chip components assembly line [1][2][3]. With the miniaturization of chips and the densification of components packaging on FICS, the inspection for faulty solder joints is increasingly focused on the automatic optical inspection (AOI) systems, which has excellent abilities of reliability and repetitiveness [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

A novel solder joints inspection method using curvature and geometry features in high-density flexible IC substrates surface mount technology

Zeng¹,

Hu²,

Zhang³

et al. 2021

Phys. Scr.

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The automatic optical inspection based defective diagnosis systems in the surface-mounted device is fairly important to the optimization of electronic manufacturing. The gist of this paper is that presents a novel inspection system for the distinction of defective solder joints on the high-density flexible IC substrates. Initially, an ultra-high precision 3D information acquirement system is elaborated. Then, several critical sub-regions are divided and pivotal features are extracted from them, in which the differential geometry based estimation scheme to obtain discrete curvatures directly and the crest line representation based shape characterization method are proposed. Finally, each type of the solder joints is described with different and ordered feature sequences, and the practical classification process is formulated as the pattern recognition and classification problem, which is also implemented by the set of predefined diagnosis rules of thumb and the introduced logical operations. By classifying seven categories of industrial solder joints and exhaustively comparing with other state-of-the-art methods, the performances of the proposed diagnosis system is validated. Experimental results verify the effectiveness and efficiency of the developed system from three aspects, i.e. inspection speed, total correct rate, and detectable types.

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An novel image de-noising model based on gradient and adaptive curvature features and its application

Cited by 2 publications

References 41 publications

Exploitation of second-and fourth-order PDEs to improve Lossy compression of noisy images

Exploitation of second-and fourth-order PDEs to improve Lossy compression of noisy images

A novel solder joints inspection method using curvature and geometry features in high-density flexible IC substrates surface mount technology

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