Output image resolution RRS feed

  • Question

  • I am trying to make a large (84" x 60") banner with an aerial photography background of a Microsoft Hybrid Earth map.  The overlay is our own GPS points of interest.  The only sources for the image I want (that I know of) are Google Earth and ArcGIS overlay.

    I take screenshots using the Windows Snipping tool, these are saved at 96 dpi (according to Exif).  When I stitch them with ICE, the output retains the 96 dpi.  1) Is there any way to increase the resolution?

    When I stitch the same source screen captures in Canon Photostitch, I get the 150 dpi output I was looking for.  So I create a 2x2 grid in Photostitch and use those as 150 dpi inputs to ICE expecting the output to be 150 dpi, but the output reverts back to 96 dpi (calculated from Paint as ICE does not populate the Exif it seems).  2) Can I force ICE to retain the resolution that I am inputting to it?

    3) For this type of application, should I stitch with Planar Motion 1, 2, or 3?  4) Could you explain what these motions entail? [Never mind, I found this one...]

    4) What are the minimum, maximum, and desired overlay?  My 'grid' is composed of squares that should be 3" by 3", I have been capturing approximately 4" x 4" in my original screen captures.

    5) Is there any kind of manual for ICE?

    6) If I continue, will I hit the barrier where a 32 bit Windows 7 (or Vista) will not do the job?

    Thanks in advance.

    • Edited by AzRoute66 Friday, May 24, 2013 2:55 AM
    Thursday, May 23, 2013 8:45 PM

All replies

  • 1) DPI of a photo is a very nebulous thing.  As an example, take a picture of a one inch square with a digital camera from two different distances and the square will occupy two different quantities of pixels.  Would that mean that the camera was using two different DPI values?  How would it know?  Now take a picture of two different 1" squares that are two different distances from the camera.  What is the right DPI now?  So, as you can see, for a picture DPI is really meaningless.  This is probably why ICE doesn't even bother putting in a DPI value.  The 150DPI value you get from your other program is probably just a default value.

    Also realize that the best resolution I've seen in Google Earth is Half Meter, which equates to about 20 inches per dot, or .05DPI.

    2) Given a decent photo editor, you can change the DPI of any photo without touching the actual pixels, so you can make it whatever you want.  I may have even done it with Paint...

    I don't have any answers for the rest of your questions, sorry.

    Monday, August 5, 2013 7:23 PM