A high dynamic range, high precision framework for measuring machinery part using structured light

2017 ◽  
Author(s):  
Tu Nguyen ◽  
Truong Tran ◽  
Mai Nguyen ◽  
Tuan Pham
Keyword(s):  
High Precision ◽  
Dynamic Range ◽  
Structured Light ◽  
High Dynamic Range ◽  
High Dynamic ◽  
Machinery Part

scholarly journals NULL Convention Floating Point Multiplier

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Anitha Juliette Albert ◽  
Seshasayanan Ramachandran
Keyword(s):  
High Precision ◽  
Dynamic Range ◽  
Digital Signal ◽  
High Dynamic Range ◽  
Floating Point ◽  
Single Precision ◽  
Critical Part ◽  
Point Multiplication ◽  
Null Convention Logic ◽  
High Dynamic

Floating point multiplication is a critical part in high dynamic range and computational intensive digital signal processing applications which require high precision and low power. This paper presents the design of an IEEE 754 single precision floating point multiplier using asynchronous NULL convention logic paradigm. Rounding has not been implemented to suit high precision applications. The novelty of the research is that it is the first ever NULL convention logic multiplier, designed to perform floating point multiplication. The proposed multiplier offers substantial decrease in power consumption when compared with its synchronous version. Performance attributes of the NULL convention logic floating point multiplier, obtained from Xilinx simulation and Cadence, are compared with its equivalent synchronous implementation.

scholarly journals High Precision Dent Detection by Photometric Stereo Using High Dynamic Range Camera

2017 ◽  
Vol 83 (12) ◽  
pp. 1148-1155
Author(s):  
Akihisa HASEBE ◽  
Kunihito KATO ◽  
Hideki TANAHASHI ◽  
Hidekazu HIRAYU
Keyword(s):  
High Precision ◽  
Dynamic Range ◽  
High Dynamic Range ◽  
Photometric Stereo ◽  
Range Camera ◽  
High Dynamic

IMPROVING 3D SURFACE MEASUREMENT OF MECHANICAL DETAILS BY STRUCTURED LIGHT USING HIGH DYNAMIC RANGE

2021 ◽  
pp. 145-153
Author(s):  
Tu
Keyword(s):  
Dynamic Range ◽  
Structured Light ◽  
High Surface ◽  
High Dynamic Range ◽  
Gray Code ◽  
Surface Measurement ◽  
3D Surface ◽  
Projection Pattern ◽  
High Dynamic ◽  
Surface Gloss

The measurement methods using structured light have the advantage of being fast, accurate, and noncontact with the surface of the object. However, these methods have reached its limitation when measuring mechanical details with high surface gloss, due to the unpredictable reflection of incident rays after reaching to object’s surface that, consequently, leads to the simultaneous appearance of several regions with different brightness. To address this problem, we proposed a method of synthesizing extended dynamic range images based on changing the exposure time of the camera and adjusting the illumination of the projector light source so that 3D point coordinates in both bright and dark areas could be obtained through the process. The dual-camera structured light experimental model and the lightcrafter 4500 projector are synchronized through the trigger, using the gray code in combination with the line-shift projection pattern. Experimental results show that the proposed method can precisely reconstruct the 3D surface of mechanical details, while providing higher performance than the state-of-the-art methods.

scholarly journals High dynamic range 3D measurement based on structured light: A review

2021 ◽  
Vol 1 (2) ◽  
pp. 2021004-2021004
Author(s):  
Pan ZHANG ◽  
◽  
◽  
Zhong KAI ◽  
Zhongwei LI ◽  
...  
Keyword(s):  
Dynamic Range ◽  
Structured Light ◽  
High Dynamic Range ◽  
3D Measurement ◽  
High Dynamic

High-dynamic-range interferometric bragg-cell spectrum analyser

1986 ◽  
Vol 133 (1) ◽  
pp. 26
Author(s):  
J. Mellis ◽  
G.R. Adams ◽  
K.D. Ward
Keyword(s):  
Dynamic Range ◽  
High Dynamic Range ◽  
Spectrum Analyser ◽  
High Dynamic
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