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Çeviri:Vakti Olan Birisi Yardımcı Olabilir Mi?

By askadair86 - 19-07-2011 14:50

Arkadaşlar Aşağıdaki metinlerde kısmen çeviri yaptım çat pat ingilizcemle, yardımcı olabilecek biri olursa çok sevinirim... Teşekkürler İlgilenenlere...Arkadaşlar Aşağıdaki metinlerde kısmen çeviri yaptım çat pat ingilizcemle, yardımcı olabilecek biri olursa çok sevinirim...

Teşekkürler İlgilenenlere...

 

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Ce: Çeviri:Vakti Olan Birisi Yardımcı Olabilir Mi?

By askadair86 - 19-07-2011 14:51

What is Camera Calibration and how good is PhotoModeler's? Print Email to friend PhotoModeler includes a Camera Calibration function that determines information about your camera that improves accuracy in subsequent PhotoModeler projects. PhotoModeler calculates the camera's focal length, lens distortion, format aspect ratio, and principal point. The resulting calibration data file can be saved on disk for use in all PhotoModeler projects that involve photos taken by that camera. Camera Calibration does not modify the camera. High accuracy work requires a well calibrated camera. PhotoModeler's processing and calibration algorithms have been developed and improved over a period of more than 15 years. PhotoModeler's calibration capabilities are a match for those of any other product in the market place, even those with prices up to 25 times that of PhotoModeler. PhotoModeler's Camera Calibrator is fully automated and very accurate, plus it is included at no extra charge as part of the basic software package. It is designed to be very easy to use and suitable for the broadest range of PhotoModeler users. The Camera Calibrator, in it's simplest form, uses a flat sheet or semi-flat projection of target dots. Is a flat target array the best way to do calibration? For most applications a flat sheet calibration is all you need. It is the easiest type of calibration to set up and the fastest to run. For higher accuracy, PhotoModeler has additional calibration features. You can improve your calibration further by doing two things: a) taking the calibration photos at a distance similar to the camera / object distance in your projects, and b) using a field of 3D targets instead of a flat plane. This is easily done in PhotoModeler using the field calibration methods which are built-in features of the software that are fully described in the Help file. You can set up a project of the appropriate size and 3D shape and process in PhotoModeler like most any other project (you'll want to take some photographs with rolled camera positions). These field calibration projects can even be fully automated if you have the Coded Targets Add-On module, provided you can print the coded targets at appropriate size. PhotoModeler provides the best of both worlds: a highly automated and accurate calibration method based on an easy-to-setup flat target grid that will meet most customers' requirements, and a field calibration method for large distances and 3D fields that offers even greater accuracy for demanding applications.What is Camera Calibration and how good is PhotoModeler's?
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PhotoModeler includes a Camera Calibration function that determines information about your camera that improves accuracy in subsequent PhotoModeler projects. PhotoModeler calculates the camera's focal length, lens distortion, format aspect ratio, and principal point. The resulting calibration data file can be saved on disk for use in all PhotoModeler projects that involve photos taken by that camera. Camera Calibration does not modify the camera.

High accuracy work requires a well calibrated camera. PhotoModeler's processing and calibration algorithms have been developed and improved over a period of more than 15 years. PhotoModeler's calibration capabilities are a match for those of any other product in the market place, even those with prices up to 25 times that of PhotoModeler. PhotoModeler's Camera Calibrator is fully automated and very accurate, plus it is included at no extra charge as part of the basic software package. It is designed to be very easy to use and suitable for the broadest range of PhotoModeler users.

The Camera Calibrator, in it's simplest form, uses a flat sheet or semi-flat projection of target dots. Is a flat target array the best way to do calibration? For most applications a flat sheet calibration is all you need. It is the easiest type of calibration to set up and the fastest to run. For higher accuracy, PhotoModeler has additional calibration features.

You can improve your calibration further by doing two things: a) taking the calibration photos at a distance similar to the camera / object distance in your projects, and b) using a field of 3D targets instead of a flat plane. This is easily done in PhotoModeler using the field calibration methods which are built-in features of the software that are fully described in the Help file. You can set up a project of the appropriate size and 3D shape and process in PhotoModeler like most any other project (you'll want to take some photographs with rolled camera positions). These field calibration projects can even be fully automated if you have the Coded Targets Add-On module, provided you can print the coded targets at appropriate size.

PhotoModeler provides the best of both worlds: a highly automated and accurate calibration method based on an easy-to-setup flat target grid that will meet most customers' requirements, and a field calibration method for large distances and 3D fields that offers even greater accuracy for demanding applications.

Ce: Çeviri:Vakti Olan Birisi Yardımcı Olabilir Mi?

By askadair86 - 19-07-2011 14:52

Large Plotted Calibration Sheet (product code "cals1 or cals2") Professionally Printed Calibration sheet for use with PhotoModeler's Camera Calibrator Program. Approximately 90cm X 90cm / 36" by 36", printed on a CAD plotter. The calibration sheet is used with PhotoModeler's Camera Calibrator program to produce accurate camera parameters.PhotoModeler Calibration Sheet Note: The PhotoModeler package also includes this pattern in the form of a PDF file that you can print or plot at any size. The size of the calibration sheet is important as you should calibrate using a grid that is close to the actual size of the object in your projects. You can get large grids using the slide projector method but if you don't have access to one then this plotted sheet is a good option. A calibration done with the sheet is also a good starting point and can be refined in your project work using field calibration. The sheet comes in two styles: cals1 has large target dots and is suited for calibration of video and lower resolution cameras, and cals2 has small target dots and is suited for calibration of any camera over 6 megapixels. Further information on flat-sheet calibration can be found in our Knowledge Base.Large Plotted Calibration Sheet (product code "cals1 or cals2")

Professionally Printed Calibration sheet for use with PhotoModeler's Camera Calibrator Program. Approximately 90cm X 90cm / 36" by 36", printed on a CAD plotter. The calibration sheet is used with PhotoModeler's Camera Calibrator program to produce accurate camera parameters.PhotoModeler Calibration Sheet

Note: The PhotoModeler package also includes this pattern in the form of a PDF file that you can print or plot at any size.

The size of the calibration sheet is important as you should calibrate using a grid that is close to the actual size of the object in your projects. You can get large grids using the slide projector method but if you don't have access to one then this plotted sheet is a good option. A calibration done with the sheet is also a good starting point and can be refined in your project work using field calibration.

The sheet comes in two styles:

cals1 has large target dots and is suited for calibration of video and lower resolution cameras, and
cals2 has small target dots and is suited for calibration of any camera over 6 megapixels.

Further information on flat-sheet calibration can be found in our Knowledge Base.

Ce: Çeviri:Vakti Olan Birisi Yardımcı Olabilir Mi?

By askadair86 - 19-07-2011 14:52

Can PhotoModeler's Camera Calibration output be used with other photogrammetry programs? Print Email to friend In some cases, the answer is "yes", and in other cases the conversion may be fraught with subtle difficulties. There are a number of standards for defining a camera's parameters. All camera models have the same basic structure of focal length (or principal distance), principal point and lens distortion. How those parameters are defined (esp. with lens distortion) varies greatly between systems, all of which are subjectively correct for that system. There are differences such as balanced vs unbalanced radial lens distortion, and the application of signed offsets for principal point, or other variations. Sometimes when the other photogrammetric system and PhotoModeler do not share the same camera parameterization there are ways to convert between the two. In certain cases, Eos can provide some guidelines for this conversion but there is no guarantee that the conversion will work. Often a fair amount of playing with parameters types and their signs is needed to get accurate camera parameter conversion. This can often be a time-consuming and complex process with no guarantee of success...Can PhotoModeler's Camera Calibration output be used with other photogrammetry programs?
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Email to friend

In some cases, the answer is "yes", and in other cases the conversion may be fraught with subtle difficulties. There are a number of standards for defining a camera's parameters. All camera models have the same basic structure of focal length (or principal distance), principal point and lens distortion. How those parameters are defined (esp. with lens distortion) varies greatly between systems, all of which are subjectively correct for that system. There are differences such as balanced vs unbalanced radial lens distortion, and the application of signed offsets for principal point, or other variations. Sometimes when the other photogrammetric system and PhotoModeler do not share the same camera parameterization there are ways to convert between the two. In certain cases, Eos can provide some guidelines for this conversion but there is no guarantee that the conversion will work. Often a fair amount of playing with parameters types and their signs is needed to get accurate camera parameter conversion. This can often be a time-consuming and complex process with no guarantee of success...

Ce: Çeviri:Vakti Olan Birisi Yardımcı Olabilir Mi?

By askadair86 - 19-07-2011 14:53

Linkler Sırasıyla, http://www.photomodeler.com/kb/entry/26/ http://www.photomodeler.com/products/cameras/calib-sheet.htm http://www.photomodeler.com/kb/entry/30/Linkler Sırasıyla,

http://www.photomodeler.com/kb/entry/26/

http://www.photomodeler.com/products/cameras/calib-sheet.htm

http://www.photomodeler.com/kb/entry/30/

Ce: Çeviri:Vakti Olan Birisi Yardımcı Olabilir Mi?

By askadair86 - 19-07-2011 16:30

Suggestion: In high accuracy projects, strive to get all point residuals under 1.00 pixels. If you have just a few high residual points, study them on each photo to ensure they are marked and referenced correctly. If many of your points have high residuals then make sure the camera stations are solving correctly. Ensure that you are using the best calibrated camera possible. Remove points that have been manually marked unless you need them. [i]Sadece bu uyarıyı çevirecek birisi :(Suggestion: In high accuracy projects, strive to get all point residuals under 1.00 pixels. If you have just a few high residual points, study them on each photo to ensure they are marked and referenced correctly. If many of your points have high residuals then make sure the camera stations are solving correctly. Ensure that you are using the best calibrated camera possible. Remove points that have been manually marked unless you need them.

Sadece bu uyarıyı çevirecek birisi :(

 

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