Not signed in (Sign In)

Categories

Vanilla 1.1.5a is a product of Lussumo. More Information: Documentation, Community Support.

    • CommentAuthorNick
    • CommentTimeJul 13th 2010
     
    A lot of new users and testers of Imagemaster have trouble at the stage of drawing linework on stereo images following successful image orientation. The notes below should help with this as well as reveal some useful shortcuts.

    1. Aim for each node of the polyline to be on the same point on the left and right images. (There is an image correlation tool that helps you do this - see below).

    2. Choose polyline nodes on features that are obvious such as high contrast areas such as a light spot against a dark background, the end of a crack etc. Avoid features where small XY offsets could lead to large Z errors such as the corner of a building or a box.

    3. Position the crosshair cursor on the left image over the distinct feature (e.g. white spot on a wall) for your first polyline node then using the mouse scrollwheel, move the crosshair cursor on the right image to approximately the same position.

    4. Now enable the image correlation tool. This is done by either pressing the [SPACE] bar, or clicking the Binocular icon on the toolbar. Having done this, move the mouse a tiny amount and a red or green circle will appear around the LHS crosshair.

    5. A red circle means that no correlation could be made between pixels on the left and right hand images. A green circle means that Imagemaster has found a match and the right hand cursor will snap to wherever the left hand cursor moves. It should now be easy to digitize polyline nodes.

    WARNING! Always double check that the image correlation tool has found the correct position on the RHS image of the stereo pair. Occasionally where repeating patterns are present such as brick walls, it may choose the wrong point in which case reposition the crosshairs using the centre scroll wheel.

    NOTE! The pixel correlation tool may fail in areas where there is insufficient contrast to work such as dark shadows, overexposed areas or areas lacking in texture. The whole photogrammetry process relies on mapping textural features in the images.

    USEFUL TIP! Zoom in to areas of detail on your stereo images to improve the accuracy of polyline digitizing. Pressing the [Z] key is a useful shortcut. Other useful key shortcuts at this stage of the process are:

    M - to enable panning (move). Pressing this key again disables panning and allows digitizing to resume.
    X - if the left hand crosshair is hard to find, especially in images with a large amount of parallax, this will re-centre the left and right cursors.
    C - to close a polyline (e.g. around building openings or if defining a polyline inside which to create a surface TIN mesh).
    O - end polyline digitizing and leave it open (e.g. if putting in breaklines to control TIN shape)
    Z - zoom, as above and press again to disable zooming.
    [Page Down / Up] switch to the next stereo image pair (if applicable to your project). Polylines can be continued onto adjacent pairs.

    USEFUL TIP! a very fast way of accurately digitizing polylines is to convert tie points placed during image orientation to physical xyz points on the stereo images. To do this:

    1. After completing image orientation calculation (calculator icon), click the "Calculated Coordinates" tab on the results dialogue that pops up.

    2. At the bottom of this dialogue box, click the "Register Coordinates" button.

    3. Your tie points will now show up as + on the stereo images.

    4. For fast digitizing of tie points, click SNAP and POINT on the polyline dialogue that appears on the top left of the stereo screen.

    5. Place your polyline nodes by clicking on points on the left hand image only. IM will snap to these on the left and right images.
    • CommentAuthorSteve Bury
    • CommentTimeJan 15th 2013
     
    Please can you make a video of this, I don't seem to be able to do this. Any help would be appreciated.
    • CommentAuthorMike
    • CommentTimeMar 14th 2013
     
    At what point do you get stuck?
    • CommentAuthorOtis374
    • CommentTimeOct 15th 2018
     
    I totally agree with you because you doing research and share with us. The https://www.tripodsdslr.com/best-sirui-zomei-tripods-reviews/ another place where you share it.
    • CommentAuthorBrombsood
    • CommentTimeNov 23rd 2018 edited
     
    We have always seen that student often need to create the drawing in their project to get the work done easily.I have checked some of the poly line draws on the https://ukessaysreviews.com/descriptive-essay page where I found about the writing and importance of 3D drawing as well.
    • CommentAuthorroni12
    • CommentTimeNov 30th 2018 edited
     
    Comments and all marks ache been identified for the struggle in life. The change of the joy and Hearing on Call is depicted for the motive and all charges for the humans. The part is inflicted for the movement of the circumstances for the candidates.
    • CommentAuthorCheryl12
    • CommentTimeDec 15th 2018 edited
     
    The geometrics have been leaned and implemented for the people. The change of the joy and https://www.scott-properties.com/ are inducted for the desiring individuals. The shape is improved for the humans for all ideal paths for the peole.
    • CommentAuthorselfie
    • CommentTimeJan 5th 2019
     
    Apple products are revered for its quality, precision and great design. SRSG started its operations as Apple technology partners in the year 1997.
    Apple reseller ahmedabad
    newsroom automation
    Audio mixers dealers in india
    MacBook pro reseller in kolkata
    MacBook air reseller in Mumbai
    ipad service center in Guwahati
    • CommentAuthormb22
    • CommentTimeJan 8th 2019
     
    Our academic pursuits, along with a range of extracurricular activities, help in honing a child's skills and ensuring that he/she grows to be a mature and responsible citizen.

    top cbse school in greater noida
    premium school in greater noida
    • CommentAuthormb22
    • CommentTimeMar 15th 2019
     
    School believe in the individuality and unique identity of each child, and our educational philosophy is emphatic about providing a child-centric education through a unique curriculum.
    best play school in hisar
    • CommentAuthormb22
    • CommentTimeMar 15th 2019
     
    The Health system is created in a proficient way of expanding the network in the multispecialty services. With the ever-growing population, the hospital has announced many ambitious plans that have ultimately lead to the excellence.
    best maternity hospital in hisar
    test tube baby hospital in hisar
    laparoscopy surgery in hisar
    • CommentAuthornikitsm
    • CommentTimeApr 11th 2019
     
    We offer calculated visibility for the design and development of technology platforms through ourintensive research-based approach, consistency in performance, and adept decision-making caliber.

    website design company in malaysia

    online digital marketing in malaysia

    Search engine optimization companies in malaysia