Adaptation to change of lighting conditions for interactive object recognition

2007 ◽  
Vol 38 (4) ◽  
pp. 52-62
Author(s):  
Yasushi Makihara ◽  
Masao Takizawa ◽  
Yoshiaki Shirai ◽  
Nobutaka Shimada
Author(s):  
Yasushi Makihara ◽  
Masao Takizawa ◽  
Yoshiaki Shirai ◽  
Nobutaka Shimada

SINERGI ◽  
2018 ◽  
Vol 22 (1) ◽  
pp. 51
Author(s):  
Dara Incam Ramadhan ◽  
Indah Permata Sari ◽  
Linna Oktaviana Sari

Nowadays, digital image processing is not only used to recognize motionless objects, but also used to recognize motions objects on video. One use of moving object recognition on video is to detect motion, which implementation can be used on security cameras. Various methods used to detect motion have been developed so that in this research compared some motion detection methods, namely Background Substraction, Adaptive Motion Detection, Sobel, Frame Differences and Accumulative Differences Images (ADI). Each method has a different level of accuracy. In the background substraction method, the result obtained 86.1% accuracy in the room and 88.3% outdoors. In the sobel method the result of motion detection depends on the lighting conditions of the room being supervised. When the room is in bright condition, the accuracy of the system decreases and when the room is dark, the accuracy of the system increases with an accuracy of 80%. In the adaptive motion detection method, motion can be detected with a condition in camera visibility there is no object that is easy to move. In the frame difference method, testing on RBG image using average computation with threshold of 35 gives the best value. In the ADI method, the result of accuracy in motion detection reached 95.12%.


2013 ◽  
Vol 21 (3) ◽  
pp. 349-355
Author(s):  
Shayenne Elizianne Ramos ◽  
Luis David Solis Murgas ◽  
Monica Rodrigues Ferreira ◽  
Carlos Alberto Mourao Junior

Objective. This study aimed to investigate the effect of different light/ dark cycles and light intensity during behavioral tests of learning and working memory in Swiss mice. Method. Fifty-seven Swiss mice were kept in a housing room in either a 12:12h light/dark cycle (LD), con­stant light (LL), or constant darkness (DD). The animals were then tested in Lashley maze and Object recognition task under either 500 or 0 lux illumination, resulting in six treatments (LD-500, LD-0, LL- 500, LL-0, DD-500, and DD-0). Results. There were no significant differences between the conditions of light/dark, or between tests at 500 and 0 lux. Animals kept in constant darkness and tested at 0 lux (DD-0) had learning and working memory impaired, as demon­strated by slower learning in Lashley III maze, and no object recogni­tion in Object recognition task. Conclusion. Continuous darkness throughout the experiment affected the learning and working mem­ory of Swiss mice.


Author(s):  
Luca Minciullo ◽  
Fabian Manhardt ◽  
Kei Yoshikawa ◽  
Sven Meier ◽  
Federico Tombari ◽  
...  

GeroPsych ◽  
2010 ◽  
Vol 23 (3) ◽  
pp. 169-175 ◽  
Author(s):  
Adrian Schwaninger ◽  
Diana Hardmeier ◽  
Judith Riegelnig ◽  
Mike Martin

In recent years, research on cognitive aging increasingly has focused on the cognitive development across middle adulthood. However, little is still known about the long-term effects of intensive job-specific training of fluid intellectual abilities. In this study we examined the effects of age- and job-specific practice of cognitive abilities on detection performance in airport security x-ray screening. In Experiment 1 (N = 308; 24–65 years), we examined performance in the X-ray Object Recognition Test (ORT), a speeded visual object recognition task in which participants have to find dangerous items in x-ray images of passenger bags; and in Experiment 2 (N = 155; 20–61 years) in an on-the-job object recognition test frequently used in baggage screening. Results from both experiments show high performance in older adults and significant negative age correlations that cannot be overcome by more years of job-specific experience. We discuss the implications of our findings for theories of lifespan cognitive development and training concepts.


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