Thanks Jordi, using the ram option did, indeed, help to eliminate the stripes (but i still get a blank image. well an image with a single value). we can not use BandMath because we want to convert 100+ images and do not know their min and max values a priori.
On Wed, Dec 16, 2015 at 2:32 PM, Jordi Inglada <[email protected]> wrote: > Raul ZM <[email protected]> wrote: > > > > Hi there, > > > > we are trying to transform a float32 tiff image into a uint8 (so from > decimals to the interval 0 to 255). > > For this we have tested Convert: > > olbcli_Convert -in file1.tiff -out file2.tif uint8 -type linear (btw, > what would be type "none"?) > > > > and Rescale: > > otbcli_Rescale -in file1.tiff -out file2.tif uint8 -outmin 0 -outmax 255 > (also tried without the last three parameters as these are the default > values) > > > > in both cases we get blank images or an stripped image that has nothing > to do with the original file. > > Any idea/suggestion of what might be going on? > > > > Hi, > > Images with stripes can appear due to streaming (or multi-threading, I > am not sure) because the min/max values for the input image are not > computed globally. I guess that you can avoid that by using the -ram > option for streaming. > > But if you know the range of your input image, the easiest is to use the > BandMath application to do the operation and choose the output pixel > value: > > otbcli_BandMath -il float.tif -out rescaled.tif uint8 -exp > "(im1b1-min)/(max-min)*255" > > If you have several bands, you will have to adapt the expression. > > Jordi > > -- > -- > 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 a topic in the > Google Groups "otb-users" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/otb-users/E5e_QW1Oy4Y/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- -- 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/d/optout.
