Hi below my response about Q1 Band1 : Horizontal Disparity map Band2 : Vertical Disparity Map Band3: Metric values
The BlockMatch output has 3 bands, the fourth is computed by Monteverdi and does not exist in input imagee cheers 2014-02-17 17:33 GMT+01:00 Ofer Zilberstein <[email protected]>: > > Hi OTB uses, > > I would like to share my experience and raise some Q' regard the process > of extraction DSM from Pleiades Stereo Model > > This is my first step toward change detection between Pleiades fresh > imagery & existing geo-data-base > > 0) OS - Win 7 - 64bit > > 1) I have Pleiades Regular Stereo Model > > 2) I extracted ROI of 4000 x 4000 pixels for the left and then I created > ROI with -mode.fit option for the right (according to best practice). > > 3) I started with StereoFramework, and after it crashed I followed section > 3.6 step by step and I successfully generated DSM file. > > 4) Although there are some typo errors (e.g - > in otbcli_StereoRectificationGridGenerator the -io.outimage1 should > be -io.outleft) the process went fine. > > *Q-1* - it is stated that otbcli_BlockMatching creates by default a two > bands image : the horizontal and vertical disparities. When I look at the > image (e.g. disparity_map_ncc.tif) with Monteverdi I see 3 bends and > amplitude. > > bend 1 has values between -43 to 5 > bend 2 is empty > bend 3 looks like disparity map with proper NCC values 0.5 to > 0.98 (I think that this is the horizontal) > bend 4 (named amplitude) has values between 0 to 40 > > In the step of filtering the NCC values (p. 81) , the example only shows > how to filter horizontal (bend 3) then concatenate thresholded horizontal & > vertical disparities... > > However - I cannot figure out where the vertical disparity resides ? > > ================================== > > *Q-2* - Is it correct' or essential for accurate DSM and ortho' to > follow chapter 3.2.5 Residual registration (between the two stereo images) > before the DSM extraction ? > > Thanks in advanced ... > > Ofer > > -- > -- > Check the OTB FAQ at > http://www.orfeo-toolbox.org/FAQ.html > > You received this message because you are subscribed to the Google > Groups "otb-users" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/otb-users?hl=en > --- > You received this message because you are subscribed to the Google Groups > "otb-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. > -- -- Check the OTB FAQ at http://www.orfeo-toolbox.org/FAQ.html You received this message because you are subscribed to the Google Groups "otb-users" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/otb-users?hl=en --- You received this message because you are subscribed to the Google Groups "otb-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
