shape from shade, so i do not take over Bjorn's Options

[JohnVV]

So that i do not take over his nice thread i figured i would start a new one
I am just figuring it out so bear with me
Rhea
This is a example - very early example
http://www.shatters.net/forum/viewtopic.php?f=5&t=15847

one that i am going to redo .
the program i am using "Cyclops" has a few bugs

Enceladus
this is a good example a bit better than the above



the close ups are a 8k level 3 VT with and without a texture over it
then a 4k level2 vt

unfortunately i still have to figure out a bug .I need to run a highpass on it ( the 32 bit isis dem )
Cyclops exports to a 3d *.ply this is easy to export to a isis cub
and i get this ( this happens when i combine 16 smaller images into one big one )
and this example is at 1/2 size


Just a bit of a bug !!!

[JohnVV]

just a update on a rather old thread
i was asked about using SFS
starting image of Ceres PIA21750


a 8 bit copy of the 32 bit float image


and a hillshade using GDAL


yes i am using the same old mini.cpp
-- link
https://drive.google.com/file/d/1v_y_rmCC6p...iew?usp=sharing

contains the original readme and the paper in pdf format along with the PIA21750 image
REQUIRES g++3.3 to build !!!

i also use a bash script to automate the multi resolution i use
a 1024x1024 , a 512x512,a 256x256 and a 128x128 images
this script uses
GDAL and G'Mic ( the TERMINAL VERSION of gmic)

CODE

#!/bin/bash

gmic PIA21750.pgm -resize 128,128 -split_freq 10% -n[1] 0,1 -o[1] 128.tif
gmic PIA21750.pgm -resize 256,256 -split_freq 10% -n[1] 0,1 -o[1] 256.tif
gmic PIA21750.pgm -resize 512,512 -split_freq 10% -n[1] 0,1 -o[1] 512.tif
gmic PIA21750.pgm  -split_freq 10% -n[1] 0,1 -o[1] 1k.tif

gdal_translate -of EHdr -ot Float32 128.tif 128.raw
gdal_translate -of EHdr -ot Float32 256.tif 256.raw
gdal_translate -of EHdr -ot Float32 512.tif 512.raw
gdal_translate -of EHdr -ot Float32 1k.tif 1k.raw

mini_sfs 1k.raw 2 35 95 2 66 2 c_dem
gmic c_dem1.raw,1024,1024 -split_freq 3% -n[1] 0.1,0.9 -o[1] 1kc.tiff

mini_sfs 512.raw 2 35 95 10 125 2 512_dem
gmic 512_dem1.raw,512,512 -resize 1024,1024 -blur 3 -split_freq 4% -n[1] 0.05,0.95 -o[1] 1k_512.tiff

mini_sfs 256.raw 2 35 95 10 200 2 256_dem
gmic 256_dem1.raw,256,256 -resize 1024,1024 -blur 4 -split_freq 5% -n[1] 0.05,0.95 -o[1] 1k_256.tiff

mini_sfs 128.raw 2 35 95 25 600 2 128_dem
gmic 128_dem1.raw,128,128 -resize 1024,1024 -blur 5 -split_freq 6% -n[1] 0,1 -o[1] 1k_128.tiff

gmic 1kc.tiff 1kc.tiff 1k_512.tiff 1k_256.tiff 1k_128.tiff -blend add -div 5 -n 0.1,0.9 -o HeightMap.tiff

gdaldem hillshade -z 40 -az 95 -alt 35 -compute_edges HeightMap.tiff hillshade.tiff

# this line below can be undocumented after a good test
# rm 128.tif 128.hdr 256.tif 256.hdr 512.tif 512.hdr 1k.tif 1k.hdr 128.raw 128_dem.hdr 128_dem1.raw 256.raw 256_dem.hdr 256_dem.hdr 256_dem1.raw 512.raw 512_dem.hdr 512_dem1.raw 1k.raw  1kc.tiff 1k_512.tiff 1k_256.tiff 1k_128.tiff c_dem.hdr c_dem1.raw 128.raw.aux.xml 256.raw.aux.xml 512.raw.aux.xml 1k.raw.aux.xml

now this is important !!!
the way i make the height map looses ALL real height information
only the RELATIVE data is there . If it looks twice as high and something in the image it is likely about twice as high but there is NO height in meters information