Displaying publications 1 - 20 of 37 in total

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  1. Omar K, Baha Raja D, Abdul Taib NA, Rajaram N, Ahmed J, Arvinder-Singh HS, et al.
    Travel Med Infect Dis, 2022;47:102318.
    PMID: 35342008 DOI: 10.1016/j.tmaid.2022.102318
    BACKGROUND: Guided by the best practices adapted from national and international bodies including the World Health Organization (WHO), the Centers for Disease Control (CDC), and the UK Joint Biosecurity Centre (JBC), this paper aims to develop and provide an empirical risk stratification and assessment framework for advancing the safe resumption of global travel during the COVID-19 pandemic.

    METHOD: Variables included in our model are categorized into four pillars: (i) incidence of cases, (ii) reliability of case data, (iii) vaccination, and (iv) variant surveillance. These measures are combined based on weights that reflect their corresponding importance in risk assessment within the context of the pandemic to calculate the risk score for each country. As a validation step, the outcome of the risk stratification from our model is compared against four countries.

    RESULTS: Our model is found to have good agreement with these benchmarked risk designations for 27 out of the top 30 countries with the strongest travel ties to Malaysia (90%). Each factor within this model signifies its importance and can be adapted by governing bodies to address the changing needs of border control policies for the recommencement of international travel.

    CONCLUSION: In practice, the proposed model provides a turnkey solution for nations to manage transmission risk by enabling stakeholders to make informed, evidence-based decisions to minimize fluctuations of imported cases and serves as a structure to support the improvement, planning, and activation of public health control measures.

  2. Muthupalaniappen L, Omar J, Omar K, Iryani T, Hamid SN
    PMID: 23431837
    We carried out a cross sectional study to detect emotional and behavioral problems among adolescents who smoke and their help-seeking behavior. This study was conducted in Sarawak, East Malaysia, between July and September 2006. Emotional and behavioral problems were measured using the Youth Self-Report (YSR/11-18) questionnaire; help seeking behavior was assessed using a help-seeking questionnaire. Three hundred ninety-nine students participated in the study; the smoking prevalence was 32.8%. The mean scores for emotional and behavioral problems were higher among smokers than non-smokers in all domains (internalizing, p = 0.028; externalizing, p = 0.001; other behavior, p = 0.001). The majority of students who smoked (94.7%) did not seek help from a primary health care provider for their emotional or behavioral problems. Common barriers to help-seeking were: the perception their problems were trivial (60.3%) and the preference to solve problems on their own (45.8%). Our findings suggest adolescent smokers in Sarawak, East Malaysia were more likely to break rules, exhibit aggressive behavior and have somatic complaints than non-smoking adolescents. Adolescent smokers preferred to seek help for their problems from informal sources. Physicians treating adolescents should inquire about smoking habits, emotional and behavioral problems and offer counseling if required.
  3. Muhammad NA, Shamsuddin K, Omar K, Shah SA, Mohd Amin R
    Malays J Med Sci, 2014 Sep-Oct;21(5):51-9.
    PMID: 25977634 MyJurnal
    Parenting behaviour is culturally sensitive. The aims of this study were (1) to translate the Parental Bonding Instrument into Malay (PBI-M) and (2) to determine its factorial structure and validity among the Malaysian population.
  4. Jusoh Z, Tohid H, Omar K, Muhammad NA, Ahmad S
    Malays J Med Sci, 2018 Feb;25(1):84-95.
    PMID: 29599638 MyJurnal DOI: 10.21315/mjms2018.25.1.10
    Background: The quality of life (QoL) describes the multidimensional self-perceived well-being of a person, which is an important diabetes outcome. This study aimed to measure the QoL scores among patients with type 2 diabetes mellitus (T2DM), as well as their clinical and sociodemographic predictors.

    Methods: This cross-sectional study involved 180 randomly sampled patients at a primary care clinic on the East Coast of Peninsular Malaysia. A self-administered questionnaire containing the Audit of Diabetes Dependent Quality of Life-18 (ADDQoL-18) was used.

    Results: Most of the respondents (96.7%) were Malay, with a median (interquartile range, IQR) age of 54.0 (14.0) years old. The majority of them were females (60.0%), married (81.1%) and from low-income families (63.3%), who attained a secondary education or lower (75.6%). Only 49.4% of them were employed. The mean (standard deviation, SD) ADDQoL-18 average weighted impact score was -4.58 (2.21) and all 18 domains were negatively affected, particularly the living condition, family life and working life. The multiple linear regression analysis showed that the age (adjusted B = 0.05,P= 0.004) and insulin use (adjusted B = -0.84,P= 0.011) were QoL predictors.

    Conclusion: T2DM negatively impacts the patient's QoL in all aspects of their life. The QoL improvement with age suggests that the older patients had accepted and adapted to their illness. The need to improve the QoL among insulin users was also highlighted.
    Study site: Klinik Kesihatan, Malaysia
  5. Tohid H, Ishak N, Muhammad NA, Ahmad FN, Aziz AA, Omar K
    Malays J Med Sci, 2012 Apr;19(2):35-47.
    PMID: 22973136 MyJurnal
    BACKGROUND: The prevalence of teenage smoking has decreased over the past decade following the implementation of the national tobacco control programme. However, the effect of the programme on smoking cessation in teenagers has not been determined.
    METHODS: Twenty-eight participants (12 teenagers, 8 teachers, and 8 doctors) were interviewed using 5 in-depth interviews and 3 group discussions. Social cognitive theory (SCT) was applied as the theoretical framework. Semi-structured interview protocols were used, and thematic analysis and analytic generalisation utilising SCT were performed.
    RESULTS: The current national tobacco control programme was found to be ineffective in promoting smoking cessation among teenagers. The participants attributed the ineffective campaign to the followings: inadequacy of message content, lack of exposure to the programme, and poor presentation and execution. In addition, the participants perceived the developed tobacco control policies to be a failure based on poor law enforcement, failure of retailers to comply with the law, social availability of cigarettes to teenagers, and easy availability of cheap, smuggled cigarettes. This study highlighted that the programme-related problems (environmental factors) were not the only factors contributing to its perceived ineffectiveness. The cunning behaviour of the teenagers (personal factor) and poor self-efficacy to overcome nicotine addiction (behavioural factor) were also found to hinder cessation.
    CONCLUSION: Tobacco control programmes should include strategies beyond educating teenagers about smoking and restricting their access to cigarettes. Strategies to manage the cunning behaviour of teenagers and strategies to improve their self-efficacy should also be implemented. These comprehensive programmes should have a foundation in SCT, as this theory demonstrates the complex interactions among the environmental, personal, and behavioural factors that influence teenage smoking.
    KEYWORDS: adolescent; health campaigns; qualitative research; tobacco cessation; tobacco smoking
  6. Lew JH, Matar OK, Müller EA, Luckham PF, Sousa Santos A, Myo Thant MM
    Polymers (Basel), 2023 Oct 10;15(20).
    PMID: 37896286 DOI: 10.3390/polym15204037
    In this work, the interaction of hydrolysed polyacrylamide (HPAM) of two molecular weights (F3330, 11-13 MDa; F3530, 15-17 MDa) with calcium carbonate (CaCO3) was studied via atomic force microscopy (AFM). In the absence of polymers at 1.7 mM and 1 M NaCl, good agreement with DLVO theory was observed. At 1.7 mM NaCl, repulsive interaction during approach at approximately 20 nm and attractive adhesion of approximately 400 pN during retraction was measured, whilst, at 1 M NaCl, no repulsion during approach was found. Still, a significantly larger adhesion of approximately 1400 pN during retraction was observed. In the presence of polymers, results indicated that F3330 displayed higher average adhesion (450-625 pN) and interaction energy (43-145 aJ) with CaCO3 than F3530's average adhesion (85-88 pN) and interaction energy (8.4-11 aJ). On the other hand, F3530 exerted a longer steric repulsion distance (70-100 nm) than F3330 (30-70 nm). This was likely due to the lower molecular weight. F3330 adopted a flatter configuration on the calcite surface, creating more anchor points with the surface in the form of train segments. The adhesion and interaction energy of both HPAM with CaCO3 can be decreased by increasing the salt concentration. At 3% NaCl, the average adhesion and interaction energy of F3330 was 72-120 pN and 5.6-17 aJ, respectively, while the average adhesion and interaction energy of F3530 was 11.4-48 pN and 0.3-2.98 aJ, respectively. The reduction of adhesion and interaction energy was likely due to the screening of the COO- charged group of HPAM by salt cations, leading to a reduction of electrostatic attraction between the negatively charged HPAM and the positively charged CaCO3.
  7. Albadr MAA, Tiun S, Ayob M, Al-Dhief FT, Omar K, Hamzah FA
    PLoS One, 2020;15(12):e0242899.
    PMID: 33320858 DOI: 10.1371/journal.pone.0242899
    The coronavirus disease (COVID-19), is an ongoing global pandemic caused by severe acute respiratory syndrome. Chest Computed Tomography (CT) is an effective method for detecting lung illnesses, including COVID-19. However, the CT scan is expensive and time-consuming. Therefore, this work focus on detecting COVID-19 using chest X-ray images because it is widely available, faster, and cheaper than CT scan. Many machine learning approaches such as Deep Learning, Neural Network, and Support Vector Machine; have used X-ray for detecting the COVID-19. Although the performance of those approaches is acceptable in terms of accuracy, however, they require high computational time and more memory space. Therefore, this work employs an Optimised Genetic Algorithm-Extreme Learning Machine (OGA-ELM) with three selection criteria (i.e., random, K-tournament, and roulette wheel) to detect COVID-19 using X-ray images. The most crucial strength factors of the Extreme Learning Machine (ELM) are: (i) high capability of the ELM in avoiding overfitting; (ii) its usability on binary and multi-type classifiers; and (iii) ELM could work as a kernel-based support vector machine with a structure of a neural network. These advantages make the ELM efficient in achieving an excellent learning performance. ELMs have successfully been applied in many domains, including medical domains such as breast cancer detection, pathological brain detection, and ductal carcinoma in situ detection, but not yet tested on detecting COVID-19. Hence, this work aims to identify the effectiveness of employing OGA-ELM in detecting COVID-19 using chest X-ray images. In order to reduce the dimensionality of a histogram oriented gradient features, we use principal component analysis. The performance of OGA-ELM is evaluated on a benchmark dataset containing 188 chest X-ray images with two classes: a healthy and a COVID-19 infected. The experimental result shows that the OGA-ELM achieves 100.00% accuracy with fast computation time. This demonstrates that OGA-ELM is an efficient method for COVID-19 detecting using chest X-ray images.
  8. Usman OL, Muniyandi RC, Omar K, Mohamad M
    PLoS One, 2021;16(2):e0245579.
    PMID: 33630876 DOI: 10.1371/journal.pone.0245579
    Achieving biologically interpretable neural-biomarkers and features from neuroimaging datasets is a challenging task in an MRI-based dyslexia study. This challenge becomes more pronounced when the needed MRI datasets are collected from multiple heterogeneous sources with inconsistent scanner settings. This study presents a method of improving the biological interpretation of dyslexia's neural-biomarkers from MRI datasets sourced from publicly available open databases. The proposed system utilized a modified histogram normalization (MHN) method to improve dyslexia neural-biomarker interpretations by mapping the pixels' intensities of low-quality input neuroimages to range between the low-intensity region of interest (ROIlow) and high-intensity region of interest (ROIhigh) of the high-quality image. This was achieved after initial image smoothing using the Gaussian filter method with an isotropic kernel of size 4mm. The performance of the proposed smoothing and normalization methods was evaluated based on three image post-processing experiments: ROI segmentation, gray matter (GM) tissues volume estimations, and deep learning (DL) classifications using Computational Anatomy Toolbox (CAT12) and pre-trained models in a MATLAB working environment. The three experiments were preceded by some pre-processing tasks such as image resizing, labelling, patching, and non-rigid registration. Our results showed that the best smoothing was achieved at a scale value, σ = 1.25 with a 0.9% increment in the peak-signal-to-noise ratio (PSNR). Results from the three image post-processing experiments confirmed the efficacy of the proposed methods. Evidence emanating from our analysis showed that using the proposed MHN and Gaussian smoothing methods can improve comparability of image features and neural-biomarkers of dyslexia with a statistically significantly high disc similarity coefficient (DSC) index, low mean square error (MSE), and improved tissue volume estimations. After 10 repeated 10-fold cross-validation, the highest accuracy achieved by DL models is 94.7% at a 95% confidence interval (CI) level. Finally, our finding confirmed that the proposed MHN method significantly outperformed the normalization method of the state-of-the-art histogram matching.
  9. Hue KY, Lew JH, Myo Thant MM, Matar OK, Luckham PF, Müller EA
    Molecules, 2023 Aug 31;28(17).
    PMID: 37687196 DOI: 10.3390/molecules28176367
    In poorly consolidated carbonate rock reservoirs, solids production risk, which can lead to increased environmental waste, can be mitigated by injecting formation-strengthening chemicals. Classical atomistic molecular dynamics (MD) simulation is employed to model the interaction of polyacrylamide-based polymer additives with a calcite structure, which is the main component of carbonate formations. Amongst the possible calcite crystal planes employed as surrogates of reservoir rocks, the (1 0 4) plane is shown to be the most suitable surrogate for assessing the interactions with chemicals due to its stability and more realistic representation of carbonate structure. The molecular conformation and binding energies of pure polyacrylamide (PAM), hydrolysed polyacrylamide in neutral form (HPAM), hydrolysed polyacrylamide with 33% charge density (HPAM 33%) and sulfonated polyacrylamide with 33% charge density (SPAM 33%) are assessed to determine the adsorption characteristics onto calcite surfaces. An adsorption-free energy analysis, using an enhanced umbrella sampling method, is applied to evaluate the chemical adsorption performance. The interaction energy analysis shows that the polyacrylamide-based polymers display favourable interactions with the calcite structure. This is attributed to the electrostatic attraction between the amide and carboxyl functional groups with the calcite. Simulations confirm that HPAM33% has a lower free energy than other polymers, presumably due to the presence of the acrylate monomer in ionised form. The superior chemical adsorption performance of HPAM33% agrees with Atomic Force Microscopy experiments reported herein.
  10. Liliwati I, Lee VKM, Omar K
    Medicine & Health, 2007;2(1):42-47.
    MyJurnal
    The objective of this study is to determine the prevalence of dysmenorrhoea, its associated factors and its effects on school activities among adolescent girls in a secondary school in a rural district of Selangor, Malaysia. This is a cross-sectional study conducted in a public secondary school. A stratified random sampling of 300 female students (12 to 17 years old) from Form one to Form five classes were selected. A self-administered questionnaire consisting of 20-items was used to collect sociodemographic and menstrual data. Pain intensity for dysmenorrhoea was measured by numerical rating scale. The prevalence of dysmenorrhoea was 62.3%. It was significantly higher in the middle adolescence (15 to 17 years old) age group (p=0.003), girls with regular menstrual cycle (p=0.007) and a positive family history (p
  11. Omar KZ, Ariffin H, Abdullah WA, Chan LL, Lin HP
    Med. Pediatr. Oncol., 2000 May;34(5):377-8.
    PMID: 10797367
  12. Su XV, Muhammad NA, Tan PS, Tan KTM, Tohid H, Omar K
    MyJurnal
    Teenage pregnancy carries serious impacts on adolescent health. This study aimed to examine the effects of pregnancy on adolescents and to explore how they cope with the problems they faced during the pregnancy. It involved 26 adolescents residing in a government shelter home in Kuala Lumpur. A self-administered questionnaire containing a mixture of open- and closed-ended questions was used. Among physical (sleeping problem and self-care problem), psychological (emotional difficulties and low self-efficacy) and social (stigma and discrimination, financial difficulty, friendship problem and school dropout) problems, emotional difficulties were the most common problems, whereas stigma and discrimination was the least common. Young adolescents aged less than 16 years old were significantly associated with poor self-care (p=0.01). To cope with their problems, the adolescents generally used avoidance, withdrawal, and social support, particularly from parents and peers. Doctors were the least popular among all. In conclusion, holistic and individualised care is needed. Strategies to reduce emotional problem experienced by pregnant adolescents should be implemented. The available healthcare services for teenage pregnancy should also be promoted.
  13. Omar, K.
    MyJurnal
    A cross-sectional study using structured questionnaires was conducted to determine the level of knowledge, attitude and practice on breast-feeding among working mothers. A total of 200 working mothers who attended the Child Health Clinics in Temerloh, for their chil-dren's third DPT/Polio vaccination were interviewed. Eighty-nine percent of the mothers successfully initiat-ed breast-feeding. However, there was a rapid decline in breast-feeding each month especially during the period when the mothers returned to work. Only 33.5% of the mothers had at least one experience in expressing and feeding expressed breast milk to their babies and only 47% reported that they had been taught by health work-ers. The mothers scored highest on the 'benefits of breast-feeding' with a mean knowledge score of 77.9% and lowest on "storage of expressed breast milk" (35.4%). Overall the mothers showed a positive attitude towards breast-feeding. The two main reasons given for stopping breast-feeding were "work" (61.4%) and "insufficient milk" (57.9%). In conclusion, other areas of breast-feeding besides benefits such as "expressing and storing breast milk" and "how" to practise breast-feeding while working away from home are also impor-tant for working mothers.
  14. S. Izuddin, Nur Dalila Zakaria, Nur L. A., Omar K. K.
    MyJurnal
    Introduction:Filariasis is an endemic infection in tropical and subtropical countries. The disease is caused by para-sites from the group filarodidae. Epidermolysis Bullosa, on the other hand is a group of rare genetic skin diseases that characterize by skin blister and erode facilely. Due to rarity of Epidermolysis Bullosa and uncommon occurrence of Filariasis, there is extremely limited case or paper reporting on safety profile of medication that are used to treat Filariasis patient with underlying Epidermolysis Bullosa.Serious adverse event that is anticipated in this cohort of patient are Stevens-Johnson syndrome and Mazotti reaction. Case description: Surveillance activity is necessary in high endemic localities in Sabah in order to control the spread of this mosquitoes-borne disease. The available tool is Brugia RapidTM kit, a test kit that detects filarial antibodies.A 13 year-old boy with underlying Epidemolysis Bullosa Simplex was detected during surveillance activities. It was further confirmed with night blood on microscopic slide that depicted high density of parasite (microfilaria count: 31). The WHO specifically exempted the following groups from the treatment - children under 5 years of age; pregnant women; and seriously ill individuals i.e. those who are having acute or chronic illness that makes them too sick or weak to get out of bed; and those with an illness who are life-dependent on medical intervention. This is because ingestion of the medications can result in adverse events due to the destruction of killed parasites. No guideline is available for treatment of lymphatic filariasis in rare genetic disorders. Conclusion: The recommended dosage for IDA is Ivermectin 3mcg/kg, Diethylcarbamazine 6mg/kg and Albendazole 400mg for positive patient yearly. Patient was admitted in hospital for observation treatment with the suggested dose. From the case study it shows it is safe to treat this cohort patient. However, it is advisable to treat such rare cases by case basis and in comparison to others where treatment is given in the community this patients should be treat in more control environment such in the hospital.
  15. Muhammad NA, Shamsuddin K, Sulaiman Z, Amin RM, Omar K
    J Relig Health, 2017 Dec;56(6):1916-1929.
    PMID: 26809242 DOI: 10.1007/s10943-016-0185-z
    One of the popular approaches of preventing youth sexual activity in Malaysia is using religion to promote premarital sexual abstinence. Despite this intervention, youth continue to practise premarital sex. Thus, the purpose of this exploratory mixed methods study was to understand the role of religion on sexual activity among college students in Klang Valley, Malaysia. A self-administered questionnaire survey to determine the relationship between religiosity and youth sexual activity was carried out on 1026 students recruited from 12 randomly selected colleges. Concurrently, face-to-face interviews were conducted on 15 students to explore how religiosity had influenced their decision on sexual activity. The survey data were analysed using logistic regression, while the qualitative data from the interviews were examined using thematic analysis with separate analysis for each gender. Both quantitative and qualitative results were then compared and integrated. Religious activity significantly reduced the risk of continuing sexual activity among female students (AOR = 0.67, CI = 0.47, 0.95, p = 0.02) but not male students. There was no significant relationship of religious affiliation and intrinsic religiosity (inner faith) to sexual activity by gender. Having faith in religion and strong sexual desire were the main themes that explained participants' sexual behaviour. Engaging in religious activity might be effective at preventing female students from being sexually active. However, when sexual urges and desires are beyond control, religiosity might not be effective.
  16. Hanisah A, Omar K, Shah SA
    J Prim Health Care, 2009 Mar;1(1):20-5.
    PMID: 20690482
    AIM: The objective of this study was to determine the prevalence of facial acne and its impact on the quality of life among adolescents attending secondary schools in Muar, Malaysia.
    METHODS: A cross-sectional study was conducted where 409 samples were selected using stratified cluster random sampling from two secondary schools in Muar, involving Form 1 to Form 5 students. Students were diagnosed clinically and the severity of facial acne was assessed using Global Acne Grading System. A self-reported Cardiff Acne Disability Index was used to assess the quality of life among adolescents who had acne.
    RESULTS: The prevalence of facial acne among the adolescents was 67.5% (n = 276). Facial acne increased with increasing age (p = 0.001). It was more common among males (71.1%) than females (64.6%), p = 0.165. The males also had a higher prevalence of severe acne (p = 0.001). The quality of life was affected by the severity of acne. Students with severe acne had higher levels of Cardiff Acne Disability Index (rho = 0.521).
    CONCLUSION: Facial acne is a common disorder and appears to have a considerable impact on quality of life among adolescents. The above findings should alert health care professionals and the school authorities to actively identify, manage and educate adolescents with facial acne.
  17. Iqbal MZ, Rathi R, Prajapati SK, Omar K, Bahari MB, Rajan S, et al.
    J Pharm Bioallied Sci, 2020 10 15;13(1):123-128.
    PMID: 34084058 DOI: 10.4103/jpbs.JPBS_298_20
    Objective: The objective of the study was to evaluate the knowledge, attitude, and practice among pre-final and final year students of pharmacy, medicine, biotechnology, and business faculties about oral hygiene.

    Materials and Methods: A cross-sectional observational study was conducted to evaluate the knowledge, attitude, and practice of students towards oral hygiene at a private university in Malaysia. Validated questionnaires were distributed to a convenient stratified sample of 324 students studying in the different selected faculties, namely pharmacy, medicine, biotechnology, and business, respectively. The Statistical Package for Social Science (SPSS) Version 24.0 was used to analyze the data.

    Results: With regard to knowledge, upon evaluation, it was seen that the students of the Faculty of Pharmacy had the highest percentage of adequate knowledge, which was statistically significant with a P-value of 0.001 and the effect size of 0.246. On the evaluation of attitudes, it was seen that the Faculty of Biotechnology had the highest positive attitudes. According to race, Malay students had the highest positive attitude among all the races that participated in the study, which showed a P-value of 0.037 with the effect size of 0.034. Regarding practice, the Faculty of Pharmacy had the lowest practice compared with the other faculties. This variable had a P-value of 0.001 and showed to have significance against the practice with an effect size of 0.193.

    Conclusion: Overall, a good attitude was seen amongst the students on their oral hygiene. It was also observed that the attitude, knowledge, and practice of the students in a private university increased with an increasing level of education.

  18. Rashid MR, Nor Aripin KN, Syed Mohideen FB, Baharom N, Omar K, Md Taujuddin NMS, et al.
    J Nutr Metab, 2019;2019:3176018.
    PMID: 30863635 DOI: 10.1155/2019/3176018
    Background: Impaired fasting glucose (IFG) poses a higher risk of diabetes. Honey has been reported to improve metabolic abnormalities including lowering hyperglycemia. This study is sought at determining the effect of Malaysian Kelulut honey (KH) on fasting glucose levels and metabolic parameters in IFG patients.
    Methods: This quasi-experimental intervention study of 30-day duration was conducted among 60 adult patients with IFG. They were allocated into taking 30 g/day KH group (experimental group, n=30) and not taking KH group (control group, n=30). Body mass index (BMI), waist circumference, blood pressure (BP), fasting glucose, and lipid profile levels (total cholesterol, triglyceride, high-density lipoprotein, and low-density lipoprotein) were measured before and after treatment.
    Results: There was no significant difference in all measured variables at day 30 compared to day 1 within both groups. Similarly, all measured variables neither at day 1 nor at day 30 had shown a statistically significant difference between the groups.
    Conclusions: Daily intake of 30 g KH for 30 days resulted in insignificant effect on fasting glucose, fasting lipid profiles, and other metabolic parameters in patients with IFG. Further studies that employ longer study duration are needed to ascertain the finding.
    Study site: Universiti Sains Islam Malaysia (USIM) Specialist Centre, Negeri Sembilan, Malaysia, and Faculty of Medicine and Health Sciences, Kuala Lumpur in Malaysia.
  19. Sulaiman A, Omar K, Nasrudin MF
    J Imaging, 2019 Apr 12;5(4).
    PMID: 34460486 DOI: 10.3390/jimaging5040048
    In this era of digitization, most hardcopy documents are being transformed into digital formats. In the process of transformation, large quantities of documents are stored and preserved through electronic scanning. These documents are available from various sources such as ancient documentation, old legal records, medical reports, music scores, palm leaf, and reports on security-related issues. In particular, ancient and historical documents are hard to read due to their degradation in terms of low contrast and existence of corrupted artefacts. In recent times, degraded document binarization has been studied widely and several approaches were developed to deal with issues and challenges in document binarization. In this paper, a comprehensive review is conducted on the issues and challenges faced during the image binarization process, followed by insights on various methods used for image binarization. This paper also discusses the advanced methods used for the enhancement of degraded documents that improves the quality of documents during the binarization process. Further discussions are made on the effectiveness and robustness of existing methods, and there is still a scope to develop a hybrid approach that can deal with degraded document binarization more effectively.
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