The Photogrammetry, 3D Imaging and Metrology Research Group carry out a wide variety of scientific and applied research directed towards the acquisition and understanding of accurate, precise and reliable measurements of a diverse range of natural and man made objects and structures. Activities span a wide range of interests including inspection for nuclear fusion, deformation monitoring of aeronautical and engineered structures to the accurate spatial and colour recording of fine art and cultural heritage artefacts. Expertise encompasses photogrammetric image networks and sequences, vision metrology, laser scanning, range imaging and a wide range of digital recording and 3D modelling techniques. Recent collaborations include Airbus, NPL, NASA, JET, Rolls-Royce, Arup, Thameslink, British Museum, Science Museum, Petrie Museum, Tate Gallery, British Library, 3DEncounters / IET, Arius3D, FARO, Hexagon, CULTNAT, Universities of Bergen, Parma, Lancaster, RMIT, Waikato. We also work widely across UCL with active projects in Computing Science, Architecture, Anthropology, Museums & Collections, Archaeology, Slade, Information Science and the UCL Centre for Digital Humanities. SOURCE : https://iris.ucl.ac.uk/iris/browse/researchGroup/1463 3DIMPACT The UCL 3DIMPact (3D Imaging, Metrology & Photogrammetry applied coordinate technologies) Research Group carries out a wide variety of scientific and applied research directed p3dim-shard.jpgtowards the acquisition and understanding of accurate, precise and reliable measurements of a diverse range of natural and man made objects and structures. Activities span a wide range of interests including inspection for nuclear fusion, deformation monitoring of aeronautical and engineered structures to the accurate spatial and colour recording of fine art and cultural heritage artefacts. Expertise encompasses photogrammetric image networks and sequences, vision metrology, laser scanning, range imaging and a wide range of digital recording and 3D modelling techniques.
Recent collaborations include Airbus, NPL, NASA, JET, Rolls-Royce, Arup, Thameslink, British Museum, Science Museum, Petrie Museum, Tate Gallery, British Library, 3DEncounters / IET, Arius3D, FARO, Hexagon, CULTNAT, Universities of Bergen, Parma, Lancaster, RMIT, Waikato. We also work widely across UCL with active projects in Computing Science, Architecture, Anthropology, Museums & Collections, Archaeology, Slade, Information Science and the UCL Centre for Digital Humanities.
Research
3DIMPact focuses on the acquisition and analysis of accurate and reliable measurements using techniques such as imagery and laser scanning, applying these to natural and man-made objects, across a range of application areas.
3D Imaging: We test sensor accuracy, develop new calibration strategies and develop new applications for 3D cameras
BIM: Building Information Modelling has been gaining momentum recently in the UK construction industry, especially with impending government legislation that encourages the use of this process on their contracts
IN FILM MAKING SUCH AS 'THE MATRIX', photogrammetry techniques was used in most of the scenes in that film.
An another example of the 3D video :
An example of a man's face, that had been computerized into an animation figure.Using the metrology technique, that had been applied to.
Eventhough, most of the technologies of photogrammetry are used in land survey, photo aerial and etc, nowadays it has been widely used in film making. Without our awareness,
The International Society for Photogrammetry (ISP) was founded in
1910 under the leadership of its first President, Edouard Dolezal, from
Austria. After 70 years of functioning under its original name, the
Society changed its name in 1980 to the International Society for
Photogrammetry and Remote Sensing (ISPRS) and in 2000 added spatial
information sciences to its area of interest. Photogrammetry and Remote
Sensing is the science, technology and art of obtaining reliable
information from noncontact imaging and other sensor systems about the
Earth and its environment, and other physical objects and processes
through recording, measuring, analysing and representation.
The
ISPRS is a non-governmental organization devoted to the development of
international cooperation for the advancement of photogrammetry and
remote sensing, and their applications. The principal activities of the
Society are: stimulating the formulation of national or regional
Societies and promotion of exchanges between them; initiating and
coordinating research through approximately 60 Working Groups of 8
Technical Commissions; convening international symposia and congresses
at regular intervals; encouraging publication and exchange of scientific
papers and journals dealing with the photogrammetry, remote sensing and
spatial information sciences, machine vision and computer vision;
ensuring worldwide circulation of the records of discussion and the
results of research by publication of the International Annals of
Photogrammetry and Remote Sensing and the International Archives of
Photogrammetry and Remote Sensing; and fostering cooperation and
coordination with related international scientific organizations.
The ISPRS is composed of Ordinary Members representing 91 countries, 11
Associate Members, 14 Regional Members representing Associations of the 7
major continents, and 79 Sustaining Members providing institutional
support. ISPRS sponsors two peer reviewed journals, the ISPRS Journal of
Photogrammetry and Remote Sensing and the ISPRS International Journal
of Geo-Information, a bi-monthly electronic, and confers awards and
honours to meritorious individuals in the profession. The official
languages of ISPRS are English, French and German.
The ISPRS Foundation, Inc. (TIF) is an independently registered
entity that has been established to provide financial assistance and
in-kind support SOLELY for benevolent purposes that are pursued by
The International Society for Photogrammetry and Remote Sensing
(ISPRS). TIF is a public
charity formed to administer an extensive and broadly-based
international program that through the raising of funds shall
provide grants, scholarships, awards, training supplies and other forms
of scientific assistance to qualified individuals and organizations
who are pursuing and/or applying knowledge for advancing the sciences
and technologies associated with the disciplines embodied by the
ISPRS,especially to support those in developing countries and regions.
Through the public promotion of its philanthropic efforts TIF aims
to foster greater international awareness and use of the benefits that
applications
of the photogrammetry, remote sensing and spatial information
sciences produce for public good and to the well-being of
humanity and sustainability of the environment.
The ISPRS Foundation solicits donations and provides grants in 12categories of benevolence.
TIF is officially designated as a public charity formed for
non-profit, educational and scientific purposes under section 501 (c)
(3) of
the USA Internal Revenue Code and is organized and operated
exclusively for benevolent, charitable, scientific, research or
educational purposes. TIF
shall not pay any salaries or travel expenses for its Trustees and
it is limited to spend less than 2% of donations for administrative
expenses (office
operation, publicity, postage, bank fees, etc.).
Charitable Mission & Goals
The Mission of The ISPRS Foundation (TIF) is to improve the ability
of ISPRS to satisfy its aims and objectives by administering a
broadly-based international program of charitable fund raising for
providing grants to qualified individuals and organizations that
are pursuing and/or applying knowledge for advancing the sciences and
technologies associated with the disciplines embodied by ISPRS,
especially for those from emerging markets and regions. The Foundation
will raise, invest and grant funds on an unrestricted and
restricted basis for this purpose. It will contribute significantly to
the efforts of ISPRS in international cooperation and technology
transfer.
To achieve its Mission the goals of TIF are defined in 12 specific Categories for Grants and Donations as follows:
Awards - to honor by providing international recognition for
significant achievements in ′the photogrammetry, remote sensing and
spatial information′
(P&RS&SI) sciences by an individual or group.
Awareness Education - to stimulate youth (K-12) and public
interest and participation in the P&RS&SI sciences, technologies
and
applications and, to help address the global need for trained and
educated practitioners.
Distance Learning (E-Learning) - to promote and facilitate
development and open dissemination of distance learning modules in the
ISPRS sciences,
technologies and disciplines, especially to developing countries.
Fellowships - to support professional development in the P&RS&SI sciences and technologies.
International Workshops - to provide funding for supporting the
education, training and technical program aspects of international
scientific
workshops sponsored by the ISPRS, including events cosponsored with
the United Nations and other international organizations.
Internships and Exchange Programs - to foster on-the-job training
and education of end users, private companies, governments and
institutions of higher education
Preservation and Archiving - to provide support to ensure the preservation of the official scientific, technical and
administrative records of the ISPRS.
Research Initiatives - to provide support for advancing the capabilities and applications of the ISPRS sciences, technologies
and disciplines to the benefit of the international community or a multinational region.
Scholarships - to support advanced education for outstanding scholars in the P&RS&SI sciences and technologies.
Standards - to support international projects devoted to the development and dissemination of standards relevant to the
ISPRS disciplines, sciences and technologies.
Tools and Literature - to distribute textbooks and technical publications to upgrade developing country libraries; to
provide translations and underwrite subscriptions; and to provide basic tools and equipment.
Travel Grants - to enable young authors, distinguished speakers,
and officially designated Delegates, especially from
developing countries, to participate in ISPRS sponsored events and in
forums promoting international cooperation, advancements
and benefits of the P&RS&SI sciences.
How does it work?
Opportunities to apply for grants are limited to those posted on The ISPRS
Foundation (TIF) and the ISPRS websites.
Individuals, institutions, Commissions and Working Groups seeking grant support are encouraged to use their ISPRS
Member organization and/or ISPRS Commission or Working Group
officers for submission to ISPRS Council of their perceived need at
least one year in
advance. Council can use this input in determining its annual
priorities for grant funds from TIF.
An event sponsor must request directly (and well in advance) to the
ISPRS Council. Funding requests must include
specification of event date(s), schedule, breakdown of funding
needs, and name and address of event coordinator. Council will consider
the request and
seek available funding from the Board of The ISPRS Foundation. Approval is not
automatic and is dependent on priorities set by Council, the availability of TIF funds, and
if the request is in adherence with the criteria
set forth for each grant category
The ISPRS Foundation, Inc. is managed by a 'Board of Trustees' which
responds to ISPRS' grant needs that are identified by the ISPRS
Council.
ISPRS Council will annually assess needs, solicit proposals for
grants from The Foundation, and then collaborate with the Board to
approve worthy
applicants. Multinational committees (no more than two committee
members may be of the same nationality) will support the Trustees in
evaluating
the applications.
The Board of Trustees is responsible for fund raising, investment, management and approval of grants from Foundation funds.
Trustees do not receive any salary or other compensation for their services.
Hai semua! Untuk entry kali ni kami akan menerangkan tentang kalibrasi kamera. Seperti yang kita sedia maklum setiap kamera mempunyai error
dan ini bermaksud tidak ada kamera yang betul-betul tepat dan jitu nilainya.
Dengan ini bagi mengurangkan error dalam pengambilan gambar, kamera
hendaklah dikalibrasi terlebih dahulu.
Kalibrasi kamera ini dilakukan untuk mengetahui
sifat-sifat kamera bagi mengaplikasikan pembetulan kamera sama ada dari segi
pengiraan focal length, kecacatan kanta mahupun format aspek ratio dan principal
point. Ianya turut dilakukan bagi menentukan ketepatan dan kejituan nilai
untuk suatu nombor yang tetap.
Focal Length bagi sesebuah Kamera
Kecacatan Pada Kanta
Kesan Kacacatan Kanta pada Imej Mengikut Jarak
Terdapat 3 cara yang boleh digunakan dalam kalibrasi
kamera. Antaranya ialah laboratory method, field method dan stellar
method. Namun begitu cara yang menjadi keutamaan dan biasa digunapakai
ialah menggunakan kaedah laboratory. Hal ini demikian kerana,
kaedah-kaedah lain lebih memerlukan kos yang agak tinggi.
Kaedah laboratory ini biasanya dilakukan oleh
pembuat kamera itu sendiri yang mana dari agensi kerajaan. Ianya dilakukan
dengan melibatkan elemen-elemen interior orientation Elemen-elemen interior
orientation ini ditentukan melalui pengukuran yang tepat bagi sesuatu imej
target. Selain itu, lokasi imej sebenar dan kedudukan yang sepatutnya turut
dibandingkan bagi menghasilkan gambaran yang sempurna.
Kalibrasi kamera bagi kaedah stellar dan field
pula dilakukan di luar ataupun di lapangan. Antara kelemahan dkaedah ini ialah
adanya biasan atmosfera ketika kalibrasi kamera dilakukan. Selain itu, ianya
turut memerlukan alat yang berkos tinggi dan penggunaan alat kejituan yang khas
jika dibandingkan dengan kaedah lain. Namun begitu, konsep yang digunakan
adalah sama iaitu dengan mengetahui kedudukan objek. Gambar diambil dan
kemudian ianya diukur dan dinilai. Akhir sekali perbandingan dilakukan untuk
mengenal pasti kedudukan sebenar bagi sesuatu gambar itu adalah sama atau
sebaliknya yang berlaku.
Antara kaedah lain pula ialah on the job
calibration yang mana digunakan untuk close range photogrammetry.
Kaedah dilakukan dengan cara mengambil gambar untuk menghasilkan model 3D.
Dalam menghasilkan model 3D, kalibrasi kamera yang dijalankan pada ketika itu
dengan menggunakan imej yang sama.
Bagi kaedah self-calibration pula, imej yang
digunakan adalah bukan objek. Ianya melibatkan kertas kalibrasi. Kaedah ini
digunakan oleh kami semasa amali fotogrametri yang dipantau oleh Sir Razali
berjalan. Kalibrasi kamera menggunakan kaedah ini melibatkan penggunaan
perisian dan perisian yang kami gunakan ialah PhotoModeler.
Kertas Kalibrasi
Dengan ini, jelas sekali dapat kita ketahui bahawa
setiap kamera mempunyai kelemahan yang tersendiri yang mana ianya dapat
diminimakan melalui kalibrasi kamera. Namun begitu, melalui ketidaksempurnaan
penghasilan kamera dalam proses pembuatan, terdapat juga kecacatan pada kanta
kamera yang tidak dapat diperbaiki.
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