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This paper presents a calibration technique based on missing-code-detection (MCD) scheme to correct the gain error between the MSB and the LSB array in SAR ADCs with bridge-DAC structure. The MCD algorithm replaces the gain factor calculation with simple missing-codes count that significantly reduces the calibration digital overhead. It also relieves the linearity requirement of the testing signal;...
Duckietown is an open, inexpensive and flexible platform for autonomy education and research. The platform comprises small autonomous vehicles (“Duckiebots”) built from off-the-shelf components, and cities (“Duckietowns”) complete with roads, signage, traffic lights, obstacles, and citizens (duckies) in need of transportation. The Duckietown platform offers a wide range of functionalities at a low...
This paper proposes a novel feature set for JPEG steganalysis calibrated by multi-level filters. These features are built by the entries of co-occurrence matrices from multiple new planes obtained by subsampling the undecimated DCT coefficients according to specific element positions. The method can also be interpreted as a multi-level calibration method in the spatial domain by shifting the cropping...
A quality assurance approach to ensure proper camera zooming is proposed to replace existing manual process. Camera len-shake estimation is employed to measure camera quality during zooming. Typically, camera len-shake estimation has been performed by a human-operated procedure that requires repetitive operations in a time-consuming process. In this paper, a fast and efficient automatic estimation...
Laser line scan (LLS) is one of the underwater optical imaging methods, which can reduce the detrimental effects of backscatter and forward scatter. This paper put forward a 3D reconstruction method based on the LLS system, for the purpose of underwater surveying. By direct camera calibration, a coordinate mapping relationship between 2D pix coordinate and 3D world coordinate is established, which...
This study aimed to investigate the distribution and concentration of phthalate esters (PAEs) in jianghan plain more precisely. Samples of groundwater were collected from 42 sites in Jianghan plain in January to February, 2008. Sixteen phthalate esters (PAEs) in each sample were detected using solid-phase extraction (SPE) — gas chromatography (GC) spectrometry. The results showed that there were one...
In order to build a more compact, simple, mobile and reliable vision measurement system in plant physiological parameter measurement, we choose the smart camera and infrared light source as the principle components. The hardware architecture of smart camera and the software development process is described. An example of leaf area measurement algorithm is shown which include camera calibration section...
The selection of measurement configurations in robot calibration is investigated. Condition number of the robot error propagation matrix was achieved through singular value decomposition, using the condition number as the optimization objective function, a set of robot measurement configurations were selected with Solis&Wets algorithm, so that the effect of the measurement and modeling errors...
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