On Friday,  3 May 2019 at 11:27:38 -0700, giuseppe.porci...@gmail.com wrote:
> Hi,
>
> I have problems in stitching 4 pictures from a sony a5000 (aps-c) and meike
> 6.5 f/2.0 manual lens.
> I choosed "fisheye circular lens" and I inserted a 190 degree HFOV value
> (as for meike specs) and also 185 degree HFOV, maybe more accurate.
> I also cropped the circular fisheye images in Hugin crop tab as suggested
> in the forum but I obtained strange stitched image.
> The pictures may be downloaded here:
>
> http://www.visteappiedi.it/meike4/DSC00602.JPG
> http://www.visteappiedi.it/meike4/DSC00603.JPG
> http://www.visteappiedi.it/meike4/DSC00604.JPG
> http://www.visteappiedi.it/meike4/DSC00605.JPG
>
> If anyone could give a try in stitching the images and give any
> suggestions it would be a great help for me.

OK, I've taken a look at this.  By accident I used the panomatic
control point detector instead of cpfind, and it only found relations
between some of the images, not unusual for panomatic.  But with
cpfind it went completely crazy until I cropped the images.  And then
it still didn't find any control points between some of the images.

I've found in the past that an attempt to add control points manually
is doomed to failure, so I added some first and then ran “Align†.
Yes, it closed the panorama, but badly, and I discovered that it did
not add any additional points at all.

Why?  Clearly a limitation in cpfind; I have them as well, and I'm
still trying to understand them.  But one thing struck me: the images
are not overly sharp.  Looking at the 1/4000 s shutter speed and the
ISO 100, I would assume that you took these images at maximum f/2
aperture.  You might make life easier for the control point detectors
if you stop down to, say, f/4 or f/5.6.

I'm attaching the project file that I generated with the manual
control points.  You might like to play around with it.

Greg
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# hugin project file
#hugin_ptoversion 2
p f2 w3000 h1500 v360  E15.5805 R0 n"TIFF_m c:LZW r:CROP"
m g1 i0 f0 m2 p0.00784314

# image lines
#-hugin  autoCenterCrop=1 cropFactor=1.6
i w5456 h3632 f2 v198.421018983846 Ra0 Rb0 Rc0 Rd0 Re0 Eev15.580494060253 Er1 
Eb1 r0 p-44.9946191425074 y-89.9892382850148 TrX0 TrY0 TrZ0 Tpy0 Tpp0 j0 a0 b0 
c0 d0 e0 g0 t0 Va1 Vb0 Vc0 Vd0 Vx0 Vy0  S871,4585,0,3632 Vm5 n"DSC00602.JPG"
#-hugin  autoCenterCrop=1 cropFactor=1.6
i w5456 h3632 f2 v=0 Ra=0 Rb=0 Rc=0 Rd=0 Re=0 Eev15.580494060253 Er1 Eb1 r0 
p-44.9946191425074 y0 TrX0 TrY0 TrZ0 Tpy0 Tpp0 j0 a=0 b=0 c=0 d=0 e=0 g=0 t=0 
Va=0 Vb=0 Vc=0 Vd=0 Vx=0 Vy=0  S871,4585,0,3632 Vm5 n"DSC00603.JPG"
#-hugin  autoCenterCrop=1 cropFactor=1.6
i w5456 h3632 f2 v=0 Ra=0 Rb=0 Rc=0 Rd=0 Re=0 Eev15.580494060253 Er1 Eb1 r0 
p-44.9946191425074 y89.9892382850148 TrX0 TrY0 TrZ0 Tpy0 Tpp0 j0 a=0 b=0 c=0 
d=0 e=0 g=0 t=0 Va=0 Vb=0 Vc=0 Vd=0 Vx=0 Vy=0  S871,4585,0,3632 Vm5 
n"DSC00604.JPG"
#-hugin  autoCenterCrop=1 cropFactor=1.6
i w5456 h3632 f2 v=0 Ra=0 Rb=0 Rc=0 Rd=0 Re=0 Eev15.580494060253 Er1 Eb1 r0 
p44.9946191425074 y-89.9892382850148 TrX0 TrY0 TrZ0 Tpy0 Tpp0 j0 a=0 b=0 c=0 
d=0 e=0 g=0 t=0 Va=0 Vb=0 Vc=0 Vd=0 Vx=0 Vy=0  S871,4585,0,3632 Vm5 
n"DSC00605.JPG"


# specify variables that should be optimized
v Ra0
v Rb0
v Rc0
v Rd0
v Re0
v Vb0
v Vc0
v Vd0
v Eev1
v r1
v p1
v y1
v Eev2
v r2
v p2
v y2
v Eev3
v r3
v p3
v y3
v


# control points
c n0 N1 x3950.25104898375 y670.749615780793 X1954.00000766034 Y705.00001189921 
t0
c n0 N1 x3792.00000558678 y3078.00001321817 X2003.65615133985 Y2920.93220760406 
t0
c n0 N1 x3532.39724017721 y2786.5860541577 X1454.00531826086 Y2772.99104590537 
t0
c n0 N1 x3615.00001286934 y892.00000915373 X1399.36994575833 Y851.956625120782 
t0
c n1 N2 x4065.63126381838 y2522.36231974598 X2093.26064224115 Y2465.75720758945 
t0
c n1 N2 x4244.00000781819 y2347.00001294458 X2252.87110364994 Y2273.5925553044 
t0
c n1 N2 x3508.64844341689 y2819.54822403447 X1742.4161072503 Y2844.77857409062 
t0
c n1 N2 x3858.00000934511 y2043.00001129059 X1599.19914917959 Y2037.56402857473 
t0
c n2 N3 x2766.47960350229 y2501.49826972342 X1281.49520591271 Y2554.28434493281 
t0
c n2 N3 x3894.00000934617 y2036.00001135698 X2106.88594446722 Y2007.8723838625 
t0
c n2 N3 x3780.00000725167 y2742.00001233596 X2266.35576977737 Y2702.25051370647 
t0
c n3 N0 x3330.00000904619 y2522.00001090322 X1385.22818394301 Y2519.39733575748 
t0
c n3 N0 x3432.47826102234 y2067.52983988897 X1335.26450883672 Y2050.47098438612 
t0
c n3 N0 x3297.47489897541 y1710.73534293819 X1218.00000948499 Y1683.00001200916 
t0
c n3 N0 x4097.45497294365 y2056.5462665651 X1998.55478278733 Y1993.49542244248 
t0

#hugin_optimizeReferenceImage 0
#hugin_blender enblend
#hugin_remapper nona
#hugin_enblendOptions 
#hugin_enfuseOptions 
#hugin_hdrmergeOptions -m avg -c
#hugin_verdandiOptions 
#hugin_outputLDRBlended true
#hugin_outputLDRLayers false
#hugin_outputLDRExposureRemapped false
#hugin_outputLDRExposureLayers false
#hugin_outputLDRExposureBlended false
#hugin_outputLDRStacks false
#hugin_outputLDRExposureLayersFused false
#hugin_outputHDRBlended false
#hugin_outputHDRLayers false
#hugin_outputHDRStacks false
#hugin_outputLayersCompression LZW
#hugin_outputImageType tif
#hugin_outputImageTypeCompression LZW
#hugin_outputJPEGQuality 85
#hugin_outputImageTypeHDR exr
#hugin_outputImageTypeHDRCompression LZW
#hugin_outputStacksMinOverlap 0.7
#hugin_outputLayersExposureDiff 0.5
#hugin_optimizerMasterSwitch 1
#hugin_optimizerPhotoMasterSwitch 21

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