X
PrevPrev Go to previous topic
NextNext Go to next topic
Last Post 23 Feb 2013 01:34 AM by  anon
No-Data Pixel After Mosaicking
 1 Replies
Sort:
You are not authorized to post a reply.
Author Messages

anon



New Member


Posts:
New Member


--
23 Feb 2013 01:34 AM
    Hi~ I try to mosaic a set of hyperspectral images. However, after mosaicking, a lot of black pixels(no-data) appeared on overlapping area and edge area. My input data is 16 bits(1~2^16) and there are no such black pixels before mosaicking. It should not happen. My Options: Data Value to Ignore = 0, Feathering Distance = 10~50, No Color Balancing. I must use Feathering because there are some bad data (low value) in edge on every image, or is there any way to mosaic images using the max value between images ? Thanks

    MariM



    Veteran Member


    Posts:2396
    Veteran Member


    --
    28 Feb 2013 07:53 AM
    My guess is that those overlapping and edge pixels are really not 'no data' but have a value other than 0, which is your background value to ignore. So they may not be ignored but are very low values and appear black. I would display the original images and geographically link them to observe the pixel values along those edges that turn out 'black'. You may also be able to get better results by moving the images forward or backward in the mosaic so that the image with good data is on top. I don't think color balancing or feathering would affect this.
    You are not authorized to post a reply.

    Forums Products ENVI