Design and implementation of Log-Gabor filter in fingerprint image enhancement

Image quality assessment (IQA) aims to use computational models to measure the image quality consistently with subjective evaluations. The well-known structural-similarity (SSIM) index brings IQA from pixel-based stage to structure-based stage. In this paper, a novel feature-similarity (FSIM) index for full reference IQA is proposed based on the fact that human visual system (HVS) understands an image mainly according to its low-level features. Specifically, the phase congruency (PC), which is a dimensionless measure of the significance of a local structure, is used as the primary feature in FSIM. Considering that PC is contrast invariant while the contrast information does affect HVS' perception of image quality, the image gradient magnitude (GM) is employed as the secondary feature in FSIM. PC and GM play complementary roles in characterizing the image local quality. After obtaining the local quality map, we use PC again as a weighting function to derive a single quality score. Extensive experiments performed on six benchmark IQA databases demonstrate that FSIM can achieve much higher consistency with the subjective evaluations than state-of-the-art IQA metrics.

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“…One widely used spreading function is Gaussian [19,[26][27][28]. According to [19], there are some good reasons to choose Gaussian.…”

Section: A Phase Congruency (Pc)mentioning

confidence: 99%

FSIM: A Feature Similarity Index for Image Quality Assessment

Zhang

Mou

et al. 2011

IEEE Trans. on Image Process.

4,220

2,099

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“…To implement phase enhancement, several quadrature filters have been proposed, especially the log-Gabor filter [11] For our method, a 3D log-Gabor filter has been used. This is the one has two components and is obtained by multiplying the angular and radial components of the Gaussian transfer function on the logarithmic frequency domain [11]:…”

Section: Orientationmentioning

confidence: 99%

“…This is the one has two components and is obtained by multiplying the angular and radial components of the Gaussian transfer function on the logarithmic frequency domain [11]:…”

Section: Orientationmentioning

confidence: 99%

Contrast-independent curvilinear structure enhancement in 3D biomedical images

Sazak

Obara

2017

2017 IEEE 14th International Symposium on Biomedical Imaging (ISBI 2017)

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“…The parameters σ f controls the scale bandwidth and σ θ controls the angular bandwidth of the filter. 15,16 A total of 24 Log-Gabor filters, corresponding to six orientations and four frequencies, were used with σ f ¼ 0.65 and σ θ ¼ 1.5. 17 The orientation angles used are 0, 30, 60, 90, 120, and 150 deg.…”

Section: Gabor Feature Extractionmentioning

confidence: 99%

Pyroelectric linear array sensor for object recognition

Chari¹,

Jacobs

Choudhary

2014

Opt. Eng

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Abstract. This paper presents a proof of concept sensor system based on a linear array of pyroelectric detectors for recognition of moving objects. The utility of this prototype sensor is demonstrated by its use in trail monitoring and perimeter protection applications for classifying humans against animals with object motion transverse to the field of view of the sensor array. Data acquisition using the system was performed under varied terrains and using a wide variety of animals and humans. With the objective of eventually porting the algorithms onto a low resource computational platform, simple signal processing, feature extraction, and classification techniques are used. The object recognition algorithm uses a combination of geometrical and texture features to provide limited insensitivity to range and speed. Analysis of system performance shows its effectiveness in discriminating humans and animals with high classification accuracy.

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Design and implementation of Log-Gabor filter in fingerprint image enhancement

Cited by 126 publications

References 21 publications

FSIM: A Feature Similarity Index for Image Quality Assessment

FSIM: A Feature Similarity Index for Image Quality Assessment

Contrast-independent curvilinear structure enhancement in 3D biomedical images

Pyroelectric linear array sensor for object recognition

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