scholarly journals Mitigating the Effects of Variable Illumination for Tracking across Disjoint Camera Views

2006 ◽  
Author(s):  
E.d. Cheng ◽  
C. Madden ◽  
M. Piccardi
Keyword(s):  
Variable Illumination ◽  
Disjoint Camera Views

scholarly journals Binary Large Object-Based Approach for QR Code Detection in Uncontrolled Environments

2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Omar Lopez-Rincon ◽  
Oleg Starostenko ◽  
Vicente Alarcon-Aquino ◽  
Juan C. Galan-Hernandez
Keyword(s):  
Recognition Rate ◽  
Qr Code ◽  
Large Object ◽  
Position Detection ◽  
Object Based ◽  
Geometrical Features ◽  
Particular Solution ◽  
Variable Illumination ◽  
Low Performance ◽  
Iterative Filtering

Quick Response QR barcode detection in nonarbitrary environment is still a challenging task despite many existing applications for finding 2D symbols. The main disadvantage of recent applications for QR code detection is a low performance for rotated and distorted single or multiple symbols in images with variable illumination and presence of noise. In this paper, a particular solution for QR code detection in uncontrolled environments is presented. The proposal consists in recognizing geometrical features of QR code using a binary large object- (BLOB-) based algorithm with subsequent iterative filtering QR symbol position detection patterns that do not require complex processing and training of classifiers frequently used for these purposes. The high precision and speed are achieved by adaptive threshold binarization of integral images. In contrast to well-known scanners, which fail to detect QR code with medium to strong blurring, significant nonuniform illumination, considerable symbol deformations, and noising, the proposed technique provides high recognition rate of 80%–100% with a speed compatible to real-time applications. In particular, speed varies from 200 ms to 800 ms per single or multiple QR code detected simultaneously in images with resolution from 640 × 480 to 4080 × 2720, respectively.

Performance increase of tandem amorphous/microcrystalline Si PV devices under variable illumination and temperature conditions

2018 ◽  
Vol 88-90 ◽  
pp. 1025-1029 ◽  
Author(s):  
F. Ricco Galluzzo ◽  
A. Scuto ◽  
C. Gerardi ◽  
A. Battaglia ◽  
A. Canino ◽  
...  
Keyword(s):  
Temperature Conditions ◽  
Variable Illumination

Video repairing under variable illumination using cyclic motions

2006 ◽  
Vol 28 (5) ◽  
pp. 832-839 ◽  
Author(s):  
Jiaya Jia ◽  
Yu-Wing Tai ◽  
Tai-Pang Wu ◽  
Chi-Keung Tang
Keyword(s):  
Variable Illumination
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