Inspection of the accuracy of fringe projection profilometry by using hybrid methods

Year 2024, , 1452 - 1467, 15.10.2024

Burak Özbay , Zehra Saraç

https://doi.org/10.28948/ngumuh.1458662

Abstract

Fringe Projection Profilometry- FPP system is widely used for three-dimensional(3D) imaging. This system is promising. However, for the changing environmental conditions, the measurement object, system noise, and strong backlighting changing, it is difficult to obtain 3D image accurately by fringe analyzing methods such as Traditional Fourier Transform Method-TFFT in FPP System. Therefore, in this paper, the TFFT method is combined with various method and hybrid methods are formed. The aim is to investigate how these methods affect the accuracy of FPP system. To make this determination, from simulated fringe pattern, phase is calculated. Then the error values are obtained using these phase values. Consequently, it is seen from error results that TFFT with two Dimensional Empirical Mode Decomposition method-2D-EMD-FFT which gives the lowest error, is the most insensitive to the disruptive effects mentioned above. Moreover, it is the most stability and least affected by the geometric of the object under test.

Keywords

Fringe Projection Profilometry, Hybrid Methods, Fringe Analysis, Accuracy

Hibrit metotlar kullanarak ızgara projeksiyon profilemetrisinin doğruluğunun incelenmesi

Abstract

Izgara Projeksiyon Profilometri-FPP sistemi, üç boyutlu (3D) görüntüleme için yaygın olarak kullanılmaktadır. Bu sistem umut vericidir. Ancak değişen çevre koşulları, ölçüm nesnesi, sistem gürültüsü ve güçlü arka ışık değişimi nedeniyle FPP Sisteminde Geleneksel Fourier Dönüşüm Yöntemi-TFFT gibi saçak analiz yöntemleriyle doğru 3 boyutlu görüntü elde etmek zordur. Bu nedenle bu bildiride TFFT yöntemi çeşitli yöntemlerle birleştirilerek hibrit yöntemler oluşturulmuştur. Amaç bu yöntemlerin FPP sisteminin doğruluğunu nasıl etkilediğini araştırmaktır. Bu belirlemeyi yapmak için simüle edilmiş saçak deseninden faz hesaplanır. Daha sonra bu faz değerleri kullanılarak hata değerleri elde edilir. Sonuç olarak, hata sonuçlarından, en düşük hatayı veren İki Boyutlu Ampirik Mod Ayrıştırma yöntemi olan 2D-EMD-FFT'ye sahip TFFT'nin yukarıda bahsedilen bozucu etkilere en duyarsız olduğu görülmektedir. Üstelik test edilen nesnenin geometrisinden en az etkilenen ve en kararlı olanıdır.

Keywords

Izgara Projeksiyon Profilometrisi, Hibrit Yöntemler, Izgara Analizi, Doğruluk

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