Nesnelerin doğru olarak algılanması, ortam aydınlatmasının uygunluğu ile direk olarak ilişkilidir. Bu uygunluk seviyesi, lüksmetre olarak bilinen ve noktasal olarak ölçüm yapan bir ölçüm aleti ile tespit edilmektedir. Ancak, noktasal bazda yapılan bu ölçümlerin, maliyet, uzun işlem süreleri gibi bazı dezavantajları vardır. Son yıllarda bu dezavantajları ortadan kaldırmak için CCD kamera, cep telefonu ve video kameranın lüksmetre olarak kullanıldığı çalışmalar yapılmıştır. Bu çalışmalarda, sözü edilen cihazlar direk olarak ışık kaynağının karşısına yerleştirilerek lüksmetre gibi bir ışık toplayıcı olarak kullanılmışlardır. Sonrasında, yakalanan kaynak görüntüleri kullanılarak görüntü işleme ile aydınlatma şiddeti hesaplamışlardır. Sunulan bu çalışmada, kamera direk lüksmetre olarak kullanılmamıştır. Ancak ortamın tamamını temsil eden genel bir görüntü alınmıştır. Aydınlatma şiddeti hesabı için görüntü işlemeye dayalı yeni bir yöntem sunulmuştur. Alınan görüntü homomorfik filtreleme ile frekans düzleminde bileşenlerine ayrılmış, kaynak aydınlatmasını temsil eden aydınlatma bileşeni, alçak geçiren filtre ile tespit edilmiştir. Bu bileşeninin ortalama piksel değeri hesaplanmış ve aydınlatma şiddeti olarak tanımlanmıştır. Önerilen yöntemin kullanılabilirliğinin testi için ortam aydınlatmasını tanımlayan lüksmetre ölçüm sonuçları ile hesaplanan sonuçlar istatistiksel olarak analiz edilmiştir. Bu analiz sonuçları, ölçüm ve hesaplama değerleri arasında tatmin edici R2 değerleri ile bir lineer ilişki olduğu göstermiştir.
The proper perception of objects is directly related to the adequacy of the environmental lighting. This level of conformity is determined by a measurement tool known as a luxury meter and measuring pointally. However, these measurements made on a point basis have some disadvantages, such as cost, long processing time. In recent years, studies have been conducted in which CCD camera, mobile phone and video camera are used as luxury meters to eliminate these disadvantages. In these studies, the aforementioned devices were placed directly in front of the light source and used as a luxury light collector. Then, they calculated the lighting intensity with image processing using the captured source images. In this presented study, the camera was not used as a direct luxury meter. A picture that represents the entire environment. A new method based on image processing for the lighting force account has been introduced. Obtained image with homomorphic filtration, the lighting component that represents the source lighting, divided into the components in the frequency level, is detected by the low-passing filter. The average pixel value of this component is calculated and defined as lighting strength. The results calculated with the luxury meters measurement results that define the environmental lighting for the test of the proposed method’s availability have been statistically analyzed. These analysis results showed that there was a linear relationship between measurement and calculation values with satisfactory R2 values.
The correct perception of objects is directly related to the suitability of the ambient illumination. This level of conformity is determined by a measuring instrument which is known as luxmeter which measures on point based. However, these measurements made on a point basis have some disadvantages such as cost, long processing times. In order to eliminate these disadvantages in recent years, there have been studies in which CCD cameras, mobile phones and video cameras have been used as luxmeters. In these studies, said devices are placed directly opposite the light source and used as a light collector such as a luxmeter. They then calculated the illumination intensity by digital image processing techniques using aquired source images. In this study, the camera is not used directly as a luxmeter. However, an overall image representing the entire environment is taken. A new method based on image processing is presented for illumination intensity calculation. The image acquired is separated into its frequency components in the frequency plane by the homomorphic filtering, and the illumination component representing the source's illumination is detected by the low pass filter. The average pixel value of the illumination component is calculated and defined as illumination intensity. In order to test the usability of the proposed method, the measured illumination intensity with a luxmeter and the computed results of the developed method are statistically analyzed. The results of this analysis showed that there was a linear relationship between the measurement and calculation values with satisfactory R2 values.
Alan : Mühendislik
Dergi Türü : Ulusal
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