A method to measure pores and fissures in geologic materials under S.E.M. by digital image processing

1978 ◽  
Vol 36 (1) ◽  
pp. 212-213
Author(s):  
L. Montoto ◽  
M. Montoto ◽  
A. Bel-Lan
Keyword(s):  
Image Processing ◽  
Optical Microscopy ◽  
Digital Image Processing ◽  
Digital Image ◽  
Digital Processing ◽  
Free Surfaces ◽  
Geologic Materials ◽  
Automatic Information ◽  
Detector Output ◽  
Rock Specimens

INTRODUCTION.- The physical properties of rock masses are greatly influenced by their internal discontinuities, like pores and fissures. So, these need to be measured as a basis for interpretation. To avoid the basic difficulties of measurement under optical microscopy and analogic image systems, the authors use S.E.M. and multiband digital image processing. In S.E.M., analog signal processing has been used to further image enhancement (1), but automatic information extraction can be achieved by simple digital processing of S.E.M. images (2). The use of multiband image would overcome difficulties such as artifacts introduced by the relative positions of sample and detector or the typicals encountered in optical microscopy.DIGITAL IMAGE PROCESSING.- The studied rock specimens were in the form of flat deformation-free surfaces observed under a Phillips SEM model 500. The SEM detector output signal was recorded in picture form in b&w negatives and digitized using a Perkin Elmer 1010 MP flat microdensitometer.

Application of Digital Image Processing Software in Ceramic Design

2014 ◽  
Vol 543-547 ◽  
pp. 2435-2439
Author(s):  
Wei Li ◽  
Xin Yu Zhang
Keyword(s):  
Image Processing ◽  
Digital Media ◽  
Digital Image Processing ◽  
Digital Image ◽  
Processing System ◽  
Digital Processing ◽  
Geometric Transformation ◽  
Processing Software ◽  
Image Processing Software ◽  
Ceramic Design

From rest to exercise and from two-dimensional to three-dimensional, digital image processing software can be multi-angle, multi-dimension, multi-direction infiltration for the various fields of design, which has wide applications in every corner of digital media. Firstly, the digital image processing software can analyze the common digital processing system model. On the basis of the principle of RGB color histogram, it also can analyze its application in the ceramic design. According to the set of image transformation principle, the analysis of the geometric transformation plays an important role in in ceramic set, to provide the theoretical basis for the digital image processing software to a certain extent.

Application of Digital Image Processing Technology in the Process of Ceramic Art Image

2014 ◽  
Vol 687-691 ◽  
pp. 3738-3742 ◽  
Author(s):  
Zan Bin Peng
Keyword(s):  
Image Processing ◽  
Digital Image Processing ◽  
Digital Image ◽  
Processing System ◽  
Digital Processing ◽  
Processing Technology ◽  
Computer Hardware ◽  
Visual Effect ◽  
Image Processing Technology ◽  
Ceramic Art

With the improvement of computer hardware and software performance, digital multimedia technology has been applied to various fields. The visual effect of ceramic art image is affected mainly by the brightness, texture and color, in which the image defects will affect the visual effect of the ceramic product. This paper designs the digital processing system of a new ceramic art image processing, the system can repair defects in ceramic art image. In order to verify the validity and reliability of digital processing system, the lead-free perovskite structure BZT based ceramics is prepared in this paper, and the use of electron microscope and digital camera take the ceramic products processing image with artistic defects, and then using VB programming digital image processing technology carries out color re coating for the ceramic, the ceramic products electron microscopy images after restoration will be obtained by the image boundary restructuring, which provides a new computer method for the processing art of the ceramic products.

Determination of the Delamination Percentage of Compacted Bamboo Guadua Using Extended Field Digital Images Processing

2014 ◽  
Vol 600 ◽  
pp. 15-20 ◽  
Author(s):  
Edgar Torres ◽  
Patricia Luna ◽  
Caori Takeuchi
Keyword(s):  
Image Processing ◽  
Digital Image Processing ◽  
Digital Image ◽  
Digital Images ◽  
Digital Processing ◽  
Extended Field ◽  
Images Processing ◽  
Digital Images Processing ◽  
Delamination Area

The percentages of delamination of Compacted Bamboo Guadua were calculated using digital images processing. Three processes were done in the development of this project: tests of delamination, digital image pre-processing and digital image processing of the images acquired. The test of delamination followed the ASTM 5824. The digital image pre-processing was supported on the acquisition of sequences of images, doing a sweeping of the samples, and finally the digital processing worked in the generation of panoramas with sequences of images acquired from the sample. Additionally, the total area from the sample was measured digitally, the segmentation and the measurement of delamination area were done, finding the ratio between the delamination area and the total area of the sample, and obtaining the value of percentage of delamination per section. Digitally, the obtained values for samples made with fibers obtained from Stick (Varillón), Top (Sobrebasa), Middle (Basa) parts and mixture of them were 16.97%, 9.96%, 5.96% and 8.64% respectively.

scholarly journals Digital image processing algorithms for visual navigation of an unmanned aircraft

2020 ◽  
Vol 30 (3) ◽  
pp. 75-85
Author(s):  
A. A. Makarenko ◽  
L. A. Vinokurov
Keyword(s):  
Image Processing ◽  
Digital Image Processing ◽  
Digital Image ◽  
Amplitude Spectrum ◽  
Digital Processing ◽  
Spatial Spectrum ◽  
Visual Navigation ◽  
Unmanned Aircraft ◽  
General Idea ◽  
Two Dimensional

The algorithms of digital image processing in the unmanned aerial vehicle (UAV) visual navigation system are stated and the program realization of the method is presented in the article. Assessment of a range of spatial frequencies of the image is carried out using the stated algorithms. The look and structure of a two-dimensional amplitude spatial spectrum of the image allow allocating existence of vertical and horizontal borders and lines on the image and giving a general idea about their spatial orientation. The spectral submission of the compared images is also used for the acceleration of correlation function calculations. Using the results of digital processing of an amplitude two-dimensional spatial range of the image observed by the onboard TV camera the data allowing to specify the spatial UAV coordinates and to estimate a condition and position of the airfield are formed. The method is based on the numerical analysis of a two-dimensional amplitude spectrum of the image. Results of operation that confirm efficiency of the stated algorithms are presented.

Visualisation and Quantitative Evaluation of Small Thickness and Phase Steps from Electron Holograms by Digital Image Processing

1990 ◽  
Vol 48 (1) ◽  
pp. 230-231
Author(s):  
Rolf Lauer ◽  
Ade George
Keyword(s):  
Image Processing ◽  
Digital Image Processing ◽  
Digital Image ◽  
Diffraction Order ◽  
Digital Processing ◽  
Electron Bombardment ◽  
Height Difference ◽  
Contour Map ◽  
Optical Reconstruction ◽  
Thickness Variations

Digital image processing proved to be highly suited for the quantitative decoding of the phase information stored in off-axis electron holograms [1]. We want to show here that digital processing is superiour to light optical reconstruction work because of its flexibility and extended possibilities; i.e. phases and amplitudes can be displayed directly, in contrast to modulated intensity patterns in the light optical case. When a hologram is stored digitally, no further optical or photographical processing is necessary. The reconstruction can be done interactively within seconds by means of an image processor with Fast Fourier Transform hardware [2]. We give here some examples:(1) A flat MgO crystal which has been thinned by electron bombardment [3]. Fig.1a is a micrograph, copied on hard paper, where a quadratic deepening becomes just visible. Fig.1b is an off-axis hologram of this area. By light-optical interferometric reconstruction using the second diffraction order of the hologram, the contour map of Fig.1c has been obtained. Figs.1d,e are digital reconstructions where eight lines of equal phase correspond to a phase shift of 2π. This has been achieved with the method described by Ade and Lauer (these Proceedings). The shift d of the fringes corresponds to a height difference of 2.2nm. Fig.If is a superposition of Figs.1d,e giving a topographic view which reveals even smaller thickness variations.

Research on Visible Measurement of Dispersion Spot at Four Quadrant Photoelectric Detector

2011 ◽  
Vol 328-330 ◽  
pp. 2086-2091
Author(s):  
Ling Kong He ◽  
Yong Gao ◽  
Shu Cun Ning
Keyword(s):  
Image Processing ◽  
Digital Image Processing ◽  
Digital Image ◽  
Measurement Method ◽  
Measurement Accuracy ◽  
Indirect Measurement ◽  
Detector Output ◽  
Simple Measurement ◽  
Low Efficiency ◽  
Four Quadrant

This paper presented a visible measurement method of dispersion spot at a four-quadrant detector based on digital image processing according to the problem of big measurement error and low efficiency in the existing production process used by the indirect measurement method of dispersion spot based on four-quadrant detector output signal. This method designed a visible measurement optical system and established a visible measurement mathematical model of four-quadrant detector dispersion spot, obtained the four-quadrant detector photosensitive surface and dispersion spot geometrical coordinates and size through digital image processing for the four-quadrant detector photosensitive surface and the dispersion spot, then got the adjustive parameter of out-of-focus distance automatically. The results of the experiment show that this method is intuitive and simple, measurement accuracy is improved from 0.02mm to 0.004mm and the measurement time is reduced from 15 minutes to 2 minutes.

scholarly journals Shape Preferred Orientation (SPO) methodology for oriented hand specimens of rock and outcrops through digital image processing

2015 ◽  
pp. 5-13
Author(s):  
Manuela Botero García ◽  
Sara Paulina Marín López ◽  
Javier Vinasco Vallejo
Keyword(s):  
Image Processing ◽  
High Resolution ◽  
Digital Image Processing ◽  
Digital Image ◽  
Digital Processing ◽  
Preferred Orientation ◽  
Rock Fabric ◽  
Methodological Aspects ◽  
Hand Specimen

The shape-preferred orientation (SPO) is a technique, which allows the study of the fabric of deformed rocks and understanding its dominant deformational style and partitioning. This work presents SPO results and methodological aspects for one hand specimen of rock and a high-resolution composed image of an outcrop through digital image processing. The technique involves imaging of three semi-orthogonal oriented sections for digital processing and subsequent implementation in structural software. The image processing consists of digital separation of a phase of interest, i.e. defining the deformational fabric. The processed images are then implemented in the SPO2003® software for acquisition of sectional ellipses and finally implemented in the Ellipsoid2003® software to obtain the characteristic ellipsoid of deformational fabric. For outcrops, due to the difficulty to finding three appropriate sections for photography, it was only obtained a sectional ellipse, characteristic of the rock fabric based on contrasting deformed quartz segregates in mylonitic schists.

scholarly journals Identificación y caracterización litológica mediante el uso del sensor ETM+ (Landsat 7). Caso de estudio: entorno del glaciar Upsala, Argentina

2016 ◽  
pp. 57 ◽  
Author(s):  
A. Lo Vecchio ◽  
M. G. Lenzano ◽  
S. Richiano ◽  
L. E. Lenzano
Keyword(s):  
Image Processing ◽  
Digital Image Processing ◽  
Digital Image ◽  
Digital Processing ◽  
Natural Phenomenon ◽  
Rock Outcrops ◽  
Image Processing Techniques ◽  
Field Samples ◽  
Landsat 7 ◽  
Processing Techniques

<p>The object of this study aims to evaluate and analyze digital image processing techniques applied to the Enhanced Thematic Mapper Plus (ETM+), in order to demark and characterize the outcropping lithologies on the Upsala Glacier basin, Santa Cruz, Argentine Republic. The prolific technological and spatial development experienced in the last decades has given place to the generation, without precedents, of multiple remote sensors capable of capturing information of the terrestrial surface and also the improvement of digital image processing techniques and software; amongst them, the amazing possibilities in the detection and differentiation of diverse covers present on the terrestrial surface can be highlighted, such as glaciers, volcanoes, vegetation, soils, water, types of rock outcrops, etc. This situation improves mapping and monitoring of natural phenomenon in the Earth Sciences field. The proposed methodology includes radiometric corrections, elimination of unwanted covers, statistical evaluation in the combination of the most appropriate bands, application of the Z index, discretization of the statistical series, entailing tasks of spectral classification with field samples and a later validation. Valuable results were obtained by means of digital processing of images, that were validated yielding a 82% of accuracy in the proposed classification, which are good results taking into account the diversity of covers present and the lithological heterogeneity that makes up each pixel (30m). These results were also validated with existing geological maps, obtaining a good agreement.</p>

An Overview of Digital Image Processing and Recognition (Invited Paper)

1982 ◽  
Vol 40 ◽  
pp. 700-702
Author(s):  
R. C. Gonzalez
Keyword(s):  
Image Processing ◽  
New York ◽  
Digital Image Processing ◽  
Digital Image ◽  
Practical Implementation ◽  
Submarine Cable ◽  
Vigorous Growth ◽  
Digitized Pictures ◽  
Processing Techniques ◽  
And Storage

Interest in digital image processing techniques dates back to the early 1920's, when digitized pictures of world news events were first transmitted by submarine cable between New York and London. Applications of digital image processing concepts, however, did not become widespread until the middle 1960's, when third-generation digital computers began to offer the speed and storage capabilities required for practical implementation of image processing algorithms. Since then, this area has experienced vigorous growth, having been a subject of interdisciplinary research in fields ranging from engineering and computer science to biology, chemistry, and medicine.

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