Extracting OTF data from optical image objects

[npcottaris]

Currently, to get the OTF data associated with an optical image object, we must call plotOI, which also plots the OTF in addition to returning the data. I believe there is no other way, but I could be wrong. If this is indeed the case, we should probably add oiGet(oi, 'otf data'), which will compute the OTF function and return it without any plotting. Objections, suggestions?

[hjiang36]

Maybe you can try oiGet(oi, 'optics otf data'). Not sure if this is what
you want.
Also, you can have a look at oiCalculateOTF function.

Best,
HJ

On Mon, Oct 27, 2014 at 11:19 AM, Nicolas Cottaris <[email protected]

wrote:

Currently, to get the OTF data associated with an optical image object, we
must call plotOI, which also plots the OTF in addition to returning the
data. I believe there is no other way, but I could be wrong. If this is
indeed the case, we should probably add oiGet(oi, 'otf data'), which will
compute the OTF function and return it without any plotting. Objections,
suggestions?

—
Reply to this email directly or view it on GitHub
isetbio/isetbio#25.

[npcottaris]

Hi HJ,

I tried that. It bombs out for ‘diffraction limited’ optics such as a diffuser.

Nicolas

Error using opticsGet (line 479)
format is ... oi, spatialUnits,wave

Error in oiGet (line 135)
elseif isempty(varargin), val = opticsGet(optics,parm);

Error in validateDiffuser>validationScript (line 39)
otfdata = oiGet(oi, 'optics otf data')

On Oct 27, 2014, at 2:35 PM, Haomiao Jiang [email protected] wrote:

Maybe you can try oiGet(oi, 'optics otf data'). Not sure if this is what
you want.
Also, you can have a look at oiCalculateOTF function.

Best,
HJ

On Mon, Oct 27, 2014 at 11:19 AM, Nicolas Cottaris <[email protected]

wrote:

Currently, to get the OTF data associated with an optical image object, we
must call plotOI, which also plots the OTF in addition to returning the
data. I believe there is no other way, but I could be wrong. If this is
indeed the case, we should probably add oiGet(oi, 'otf data'), which will
compute the OTF function and return it without any plotting. Objections,
suggestions?

—
Reply to this email directly or view it on GitHub
isetbio/isetbio#25.

—
Reply to this email directly or view it on GitHub isetbio/isetbio#25 (comment).

[hjiang36]

Hi,

I'm not sure what command you ran, but here are some points that might

be helpful.
1) Diffraction limited lens is not widely used for human case. Maybe
you could try oiCreate('human') to create one. That one is based one model
shift-invariant and everything mentioned above should work.
2) For diffraction limited (and also other lens), there is not
wavelength specified in oiCreate. Also, if there is no scene, the program
can just use some arbitrary spatial support to compute otf. To make it work
for diffraction limited lens (not human case), try code below:
oi = oiCreate; oi = oiSet(oi, 'wave', 400:10:700); otf = oiGet(oi,
'otf data', oi);

Best,
HJ

On Mon, Oct 27, 2014 at 11:40 AM, Nicolas Cottaris <[email protected]

wrote:

Hi HJ,

I tried that. It bombs out for ‘diffraction limited’ optics such as a
diffuser.

Nicolas

Error using opticsGet (line 479)
format is ... oi, spatialUnits,wave

Error in oiGet (line 135)
elseif isempty(varargin), val = opticsGet(optics,parm);

Error in validateDiffuser>validationScript (line 39)
otfdata = oiGet(oi, 'optics otf data')

On Oct 27, 2014, at 2:35 PM, Haomiao Jiang [email protected]
wrote:

Maybe you can try oiGet(oi, 'optics otf data'). Not sure if this is what
you want.
Also, you can have a look at oiCalculateOTF function.

Best,
HJ

On Mon, Oct 27, 2014 at 11:19 AM, Nicolas Cottaris <
[email protected]

wrote:

Currently, to get the OTF data associated with an optical image
object, we
must call plotOI, which also plots the OTF in addition to returning
the
data. I believe there is no other way, but I could be wrong. If this
is
indeed the case, we should probably add oiGet(oi, 'otf data'), which
will
compute the OTF function and return it without any plotting.
Objections,
suggestions?

—
Reply to this email directly or view it on GitHub
isetbio/isetbio#25.

—
Reply to this email directly or view it on GitHub <
https://github.com/isetbio/isetbio/issues/25#issuecomment-60646182>.

—
Reply to this email directly or view it on GitHub
isetbio/isetbio#25 (comment).

[npcottaris]

Hi,

oi = oiSet(oi, 'wave', 400:10:700)

was the missing ingredient.

Thanks,
Nicolas

On Oct 27, 2014, at 3:01 PM, Haomiao Jiang [email protected] wrote:

Hi,

I'm not sure what command you ran, but here are some points that might
be helpful.

1. Diffraction limited lens is not widely used for human case. Maybe
   you could try oiCreate('human') to create one. That one is based one model
   shift-invariant and everything mentioned above should work.
2. For diffraction limited (and also other lens), there is not
   wavelength specified in oiCreate. Also, if there is no scene, the program
   can just use some arbitrary spatial support to compute otf. To make it work
   for diffraction limited lens (not human case), try code below:
   oi = oiCreate; oi = oiSet(oi, 'wave', 400:10:700); otf = oiGet(oi,
   'otf data', oi);

Best,
HJ

On Mon, Oct 27, 2014 at 11:40 AM, Nicolas Cottaris <[email protected]

wrote:

Hi HJ,

I tried that. It bombs out for ‘diffraction limited’ optics such as a
diffuser.

Nicolas

Error using opticsGet (line 479)
format is ... oi, spatialUnits,wave

Error in oiGet (line 135)
elseif isempty(varargin), val = opticsGet(optics,parm);

Error in validateDiffuser>validationScript (line 39)
otfdata = oiGet(oi, 'optics otf data')

On Oct 27, 2014, at 2:35 PM, Haomiao Jiang [email protected]
wrote:

Maybe you can try oiGet(oi, 'optics otf data'). Not sure if this is what
you want.
Also, you can have a look at oiCalculateOTF function.

Best,
HJ

On Mon, Oct 27, 2014 at 11:19 AM, Nicolas Cottaris <
[email protected]

wrote:

Currently, to get the OTF data associated with an optical image
object, we
must call plotOI, which also plots the OTF in addition to returning
the
data. I believe there is no other way, but I could be wrong. If this
is
indeed the case, we should probably add oiGet(oi, 'otf data'), which
will
compute the OTF function and return it without any plotting.
Objections,
suggestions?

—
Reply to this email directly or view it on GitHub
isetbio/isetbio#25.

—
Reply to this email directly or view it on GitHub <
https://github.com/isetbio/isetbio/issues/25#issuecomment-60646182>.

—
Reply to this email directly or view it on GitHub
isetbio/isetbio#25 (comment).

—
Reply to this email directly or view it on GitHub isetbio/isetbio#25 (comment).

[wandell]

Good. We plan to change the default on oiCreate() to add the spectrum field. Currently, it is omitted. If we insert it, we believe that your oiSet() will not be needed.