3D Image Acquisition System Based on Shape from Focus Technique [PDF]
Sensors, 2013 This paper describes the design of a 3D image acquisition system dedicated to natural complex scenes composed of randomly distributed objects with spatial discontinuities. In agronomic sciences, the 3D acquisition of natural scene is difficult due to the
Pierre Gouton +4 more
doaj +14 more sources
A Fast Shape-from-Focus-Based Surface Topography Measurement Method [PDF]
Sensors, 2021 Shape from focus is an accurate, but relatively time-consuming, 3D profilometry technique (compared to e.g., laser triangulation or fringe projection). This is the case because a large amount of data that needs to be captured and processed to obtain 3D ...
Jona Gladines +3 more
doaj +6 more sources
Roughness measurement of leaf surface based on shape from focus [PDF]
Plant Methods, 2021 Background Surface roughness has a significant effect on leaf wettability. Consequently, it influences the efficiency and effectiveness of pesticide application.
Zeqing Zhang +4 more
doaj +5 more sources
A Continuous Motion Shape-from-Focus Method for Geometry Measurement during 3D Printing [PDF]
Sensors, 2022 In 3D printing, as in other manufacturing processes, there is a push for zero-defect manufacturing, mainly to avoid waste. To evaluate the quality of the printed parts during the printing process, an accurate 3D measurement method is required.
Jona Gladines +3 more
doaj +2 more sources
An Improved Shape from Focus Method for Measurement of Three-Dimensional Features of Fuel Nozzles [PDF]
Sensors, 2022 The precise three-dimensional measurement of fuel nozzles is of great significance to assess the manufacturing accuracy and improve the spray and atomization performance.
Liang Hou +6 more
doaj +2 more sources
Edge Bleeding Artifact Reduction for Shape from Focus in Microscopic 3D Sensing [PDF]
Sensors, 2023 Shape from focus enables microscopic 3D sensing by combining it with a microscope system. However, edge bleeding artifacts of estimated depth easily occur in this environment.
Sang-Ho Park +2 more
doaj +2 more sources
Jitter noise modeling and its removal using recursive least squares in shape from focus systems [PDF]
Scientific Reports, 2022 Three-dimensional shape recovery from the set of 2D images has many applications in computer vision and related fields. Passive techniques of 3D shape recovery utilize a single view point and one of these techniques is Shape from Focus or SFF.
Husna Mutahira +3 more
doaj +2 more sources
Focus Measurement in Color Space for Shape From Focus Systems [PDF]
IEEE Access, 2021 Shape from Focus (SFF) has been studied extensively in computer vision for 3D shape and depth recovery. The first stage in SFF methods is to compute the focus value of every pixel by converting the colored images into gray scale and then apply the focus ...
Husna Mutahira +3 more
doaj +3 more sources
Directional Ring Difference Filter for Robust Shape-from-Focus
Mathematics, 2023 In the shape-from-focus (SFF) method, the quality of the 3D shape generated relies heavily on the focus measure operator (FM) used. Unfortunately, most FMs are sensitive to noise and provide inaccurate depth maps.
Khurram Ashfaq, Muhammad Tariq Mahmood
doaj +2 more sources
Wafer Surface Reconstruction Based on Shape From Focus
IEEE AccessScanning electron microscope, atomic force microscope and other equipment play an important role in the fields of topography restoration and detection. However, these devices are generally used in nanometer-scale measurement scenarios.
Shaohang Wang +3 more
doaj +2 more sources