Browsing by Subject "digital camera"

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Access status: Restricted ,
Analiza statystyczna szumów matryc aparatów cyfrowych
(Data obrony: 2011-10-17) Krawczyk, Paweł
Wydział Geologii, Geofizyki i Ochrony Środowiska
This master's thesis introduces the reader into problems of image noise in digital photography. Certain architectures of camera's matrix and the way they work are discussed. It describes experiment conducted to aquire data for further analysis. It also interprets results of this analysis for both variants of experiment.
Access status: Open Access ,
Badanie przestrzeni barwnej cyfrowego aparatu fotograficznego na przykładzie Minolty Dynax 5D
(Wydawnictwa AGH, 2006) Pirowski, Tomasz ; Tokarczyk, Regina
The proposed method of the automatism of the measurement of markers in a photo-grammetric system of 3D positioning for medical rehabilitation purposes is based on the detection of colours. Because the parameters of the calibration of colours determined based on one photo-graph are used in searching in many photographs, it is important to investigate how accurate in projecting colours a picture registering device (digital photo-camera) is. The studies referring to this phenomenon were carried out for the photo-camera Minolta Dynax 5D. A transparent test IT8 of known colour parameters in model $L*a*b$. was used in the studies. The experiments were made at day-light and artificial light, with different white balance and different speed of CCD. The results of the registration were compared in a formal and visual way with the pattern calculated into the space of colours RGB. Formal (statistic) approach allowed the detection of a difference on respective components R, G and B and defining standard deviation (noise) in single colour fields and the greyscale. In the conclusions it was stated which colours and which components get most deformed and in which range the colour balance for the greyscale is kept properly. To generalize - in order to compare different tests and - in the future - different digital cameras - a synthetic parameter was used - a so-called mean relative spectral error nQ - proposed by Wald.
Access status: Open Access ,
Współczesne cyfrowe sensory wizyjne w fotogrametrii bliskiego zasięgu
(Wydawnictwa AGH, 2006) Sawicki, Piotr
Digital images acquisition using optoelectronical systems has been predominant in close range photogrammetry for a dozen years. Digital imaging sensors are the basic hardware element of on-line and off-line photogrammetric 3D measurement systems. The classification of optical digital sensors is presented in the paper. The technical parameters of solid state sensors of CCD and CMOS type were determined and the characteristics were compared. Various types of optical digital sensors - digital video cameras, still video cameras, high-resolution digital cameras, scanning cameras, panorama cameras and high-speed cameras - used in close range applications are discussed. An analysis of the current potential of photogrammetric close range digital imaging sensors and its future development is formulated.
Access status: Open Access ,
Wykonywanie naziemnych zdjęć cyfrowych o ściśle określonej orientacji
(Wydawnictwa AGH, 2006) Bernasik, Jerzy; Mikrut, Sławomir
Taking surface images of precisely known (at the level of a theodolithe accuracy) elements of external orientation makes a rarely taken chance in terrestrial photogrammetry. Usually control points are used to increase the accuracy of the processing images when the orientation is not enough precisely known. It is particularly difficult - apparently - in case of photographs taken with non-metric cameras. The solution solved by the authors in the measurements of shape anomalies of slender buildings was based on a prototype instrument allowing the installation of a KODAK DCS 760 camera on a Theo 010 theodolithe. In the paper the authors present the results of studies enabling them to assess the accuracy of the orientation level of pictures. The described solution makes a new chance for the digital photogrammetry of a close-to-zero distance by widening the range of economically justified applications of this method in engineering and construction. The application of author's algorithms of the detection of features in a digital image allowed the analysis and measurement with a sub-pixel accuracy. This enables an accurate definition of the terrain co-ordinates of the measured points (elements).