Phenocam color image calibration using image analysis

Author(s):  
Sunoj Shajahan ◽  
Igathinathane Cannayen ◽  
John Hendrickson
1993 ◽  
Vol 20 (2) ◽  
pp. 228-235 ◽  
Author(s):  
Yean-Jye Lu ◽  
Xidong Yuan

Image analysis for traffic data collection has been studied throughout the world for more than a decade. A survey of existing systems shows that research was focused mainly on the monochrome image analysis and that the field of color image analysis was rarely studied. With the application of color image analysis in mind, this paper proposes a new algorithm for vehicle speed measurement in daytime. The new algorithm consists of four steps: (i) image input, (ii) pixel analysis, (iii) single image analysis, and (iv) image sequence analysis. It has three significant advantages. First, the algorithm can distinguish the shadows caused by moving vehicles outside the detection area from the actual vehicles passing through the area, which is a difficult problem for the monochrome image analysis technique to handle. Second, the algorithm significantly reduces the image data to be processed; thus only a personal computer is required without the addition of any special hardware. The third advantage is the flexible placement of detection spots at any position in the camera's field of view. The accuracy of the algorithm is also discussed. Key words: speed measurement, vehicle detection, image analysis, image processing, traffic control, traffic measurement and road traffic.


1991 ◽  
Vol 73 (2-3) ◽  
pp. 37a-37a
Author(s):  
Philippe Rostagno ◽  
Francette Ettore ◽  
Cyril Caldani

1995 ◽  
Vol 103 (3) ◽  
pp. 257-267 ◽  
Author(s):  
S. Helsen ◽  
P. David ◽  
W. J. J. Fermont

1990 ◽  
Vol 33 (4) ◽  
pp. 1402-1409 ◽  
Author(s):  
Y. J. Han ◽  
J. C. Hayes

1996 ◽  
Vol 16 (1Supplement) ◽  
pp. 273-276
Author(s):  
Shinzaburo UMEDA ◽  
Wen-Jei YANG ◽  
Yoshiaki UETANI

Author(s):  
Asaad Babker ◽  
Vyacheslav Lyashenko

Objective: Our aim is to show the possibility of using different image processing techniques for blood smear analysis. Also our aim is to determine the sequence of image processing techniques to identify megaloblastic anemia cells. Methods: We consider blood smear image. We use a variety of image processing techniques to identify megaloblastic anemia cells. Among these methods, we distinguish the modification of the color space and the use of wavelets. Results: We developed a sequence of image processing techniques for blood smear image analysis and megaloblastic anemia cells identification. As a characteristic feature for megaloblastic anemia cells identification, we consider neutrophil image structure. We also use the morphological methods of image analysis in order to reveal the nuclear lobes in neutrophil structure. Conclusion: We can identify the megaloblastic anemia cells. To do this, we use the following sequence of blood smear image processing: color image modification, change of the image contrast, use of wavelets and morphological analysis of the cell structure. 


1999 ◽  
Vol 267 (2) ◽  
pp. 382-389 ◽  
Author(s):  
Sanjay V. Bannur ◽  
Sunil V. Kulgod ◽  
Shalaka S. Metkar ◽  
Suresh K. Mahajan ◽  
Jayashree K. Sainis

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