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The Photoshop "Straighten Tool"?



 
 
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  #11  
Old April 23rd 18, 04:43 AM posted to rec.photo.digital
nospam
external usenet poster
 
Posts: 24,165
Default The Photoshop "Straighten Tool"?

In article , Peter Jason
wrote:


I use several cameras:
Olympus E500 (Usually the kit Lens)
Olympus E5 (Wide Angle Zuiko lenses)
Smart phone
A Panasonic Lumix (fixed lens with zoom)
I use jpegs normally, but RAW for contrasty group shots)


you should be using raw whenever possible. there is no downside.


The file sizes are huge!


not really, and disk space is cheap.

plus, the raw files from your cameras aren't all that big.
  #12  
Old April 23rd 18, 05:09 PM posted to rec.photo.digital
PeterN[_7_]
external usenet poster
 
Posts: 1,161
Default The Photoshop "Straighten Tool"?

On 4/22/2018 6:23 PM, Peter Jason wrote:
Wide-angle photos have a confusing number of lines.

Which one should be used for straightening the image?

One in the very center perhaps?


When I have several lines, I pick the one I that I feel should be
straight, of course that may vary with the image. I your camera and lens
is listed, The ACR filter has a setting for automatic adjustment. As
nospam suggested, You can also use the WA adjustment tool in PS.




--
PeterN
  #13  
Old April 23rd 18, 05:40 PM posted to rec.photo.digital
Savageduck[_3_]
external usenet poster
 
Posts: 16,487
Default The Photoshop "Straighten Tool"?

On Apr 23, 2018, PeterN wrote
(in article ):

On 4/22/2018 6:23 PM, Peter Jason wrote:
Wide-angle photos have a confusing number of lines.

Which one should be used for straightening the image?

One in the very center perhaps?


When I have several lines, I pick the one I that I feel should be
straight, of course that may vary with the image. I your camera and lens
is listed, The ACR filter has a setting for automatic adjustment. As
nospam suggested, You can also use the WA adjustment tool in PS.


https://www.youtube.com/watch?v=LMm0AD9Brp8

for older versions:
https://www.youtube.com/watch?v=Vjg4RtV4UAk

The same can be done in Lightroom Classic CC.

https://helpx.adobe.com/lightroom/ho...ection-guided-
upright.html

....and a different tack:
https://vimeo.com/205460101

--

Regards,
Savageduck

  #14  
Old April 23rd 18, 05:43 PM posted to rec.photo.digital
Savageduck[_3_]
external usenet poster
 
Posts: 16,487
Default The Photoshop "Straighten Tool"?

On Apr 23, 2018, Savageduck wrote
(in iganews.com):

On Apr 23, 2018, PeterN wrote
(in article ):

On 4/22/2018 6:23 PM, Peter Jason wrote:
Wide-angle photos have a confusing number of lines.

Which one should be used for straightening the image?

One in the very center perhaps?


When I have several lines, I pick the one I that I feel should be
straight, of course that may vary with the image. I your camera and lens
is listed, The ACR filter has a setting for automatic adjustment. As
nospam suggested, You can also use the WA adjustment tool in PS.


https://www.youtube.com/watch?v=LMm0AD9Brp8

for older versions:
https://www.youtube.com/watch?v=Vjg4RtV4UAk

The same can be done in Lightroom Classic CC.

https://helpx.adobe.com/lightroom/how-to/perspective-correction-guided-upright.html

...and a different tack:
https://vimeo.com/205460101


....and there is the Adaptive Wide Angle Filter.

https://www.youtube.com/watch?v=ywmOWmkSv7o

--

Regards,
Savageduck

  #15  
Old April 23rd 18, 06:34 PM posted to rec.photo.digital
PeterN[_7_]
external usenet poster
 
Posts: 1,161
Default The Photoshop "Straighten Tool"?

On 4/23/2018 12:43 PM, Savageduck wrote:
On Apr 23, 2018, Savageduck wrote
(in iganews.com):

On Apr 23, 2018, PeterN wrote
(in article ):

On 4/22/2018 6:23 PM, Peter Jason wrote:
Wide-angle photos have a confusing number of lines.

Which one should be used for straightening the image?

One in the very center perhaps?

When I have several lines, I pick the one I that I feel should be
straight, of course that may vary with the image. I your camera and lens
is listed, The ACR filter has a setting for automatic adjustment. As
nospam suggested, You can also use the WA adjustment tool in PS.


https://www.youtube.com/watch?v=LMm0AD9Brp8

for older versions:
https://www.youtube.com/watch?v=Vjg4RtV4UAk

The same can be done in Lightroom Classic CC.

https://helpx.adobe.com/lightroom/how-to/perspective-correction-guided-upright.html

...and a different tack:
https://vimeo.com/205460101


...and there is the Adaptive Wide Angle Filter.

https://www.youtube.com/watch?v=ywmOWmkSv7o


It all depends on what you want to do.

--
PeterN
  #16  
Old April 23rd 18, 08:10 PM posted to rec.photo.digital
Savageduck[_3_]
external usenet poster
 
Posts: 16,487
Default The Photoshop "Straighten Tool"?

On Apr 23, 2018, PeterN wrote
(in article ):

On 4/23/2018 12:43 PM, Savageduck wrote:
On Apr 23, 2018, Savageduck wrote
(in iganews.com):

On Apr 23, 2018, PeterN wrote
(in article ):

On 4/22/2018 6:23 PM, Peter Jason wrote:
Wide-angle photos have a confusing number of lines.

Which one should be used for straightening the image?

One in the very center perhaps?

When I have several lines, I pick the one I that I feel should be
straight, of course that may vary with the image. I your camera and lens
is listed, The ACR filter has a setting for automatic adjustment. As
nospam suggested, You can also use the WA adjustment tool in PS.

https://www.youtube.com/watch?v=LMm0AD9Brp8

for older versions:
https://www.youtube.com/watch?v=Vjg4RtV4UAk

The same can be done in Lightroom Classic CC.

https://helpx.adobe.com/lightroom/how-to/perspective-correction-guided-upright.html

...and a different tack:
https://vimeo.com/205460101


...and there is the Adaptive Wide Angle Filter.

https://www.youtube.com/watch?v=ywmOWmkSv7o


It all depends on what you want to do.


Always, but it is a good idea to know how to use your available tools. The
straighten tool is not always the best tool for the job especially when
shooting wide & ultra-wide, for architecture and other shots where there are
multiple vertical lines.

--

Regards,
Savageduck

  #17  
Old April 24th 18, 02:09 AM posted to rec.photo.digital
Peter Jason
external usenet poster
 
Posts: 288
Default The Photoshop "Straighten Tool"?

On Sun, 22 Apr 2018 20:40:19 -0700, Savageduck
wrote:

On Apr 22, 2018, Peter Jason wrote
(in ):

On Sun, 22 Apr 2018 18:17:39 -0700, Savageduck
wrote:

On Apr 22, 2018, Peter Jason wrote
(in ):

On Sun, 22 Apr 2018 17:00:40 -0700, Savageduck
wrote:

On Apr 22, 2018, Savageduck wrote
(in iganews.com):

On Apr 22, 2018, Peter Jason wrote
(in ):

Wide-angle photos have a confusing number of lines.

Which one should be used for straightening the image?

One in the very center perhaps?

Which edition of Photoshop are you using?
Not all editions have all the correction tools that later editions have.

Are you working with RAW or JPEG files?
Some corrections are better made with RAW files, and some tools might not
be available to JPEGs.

There are several methods of correcting wide-angle lens distortion with
Photoshop and/or Lightroom.

Sometimes, if you are lucky, just having a correct lens profile can
correct non-extreme distortion provided the FL is not too extreme.

If you are processing RAW files then you would start with ACR or
Lightroom, and use the Lens Correction tools, Transition with guided correction.
This is probably the most effective correction for wide-angle lens distortion.

There is the Adaptive Wide Angle Filter which can Auto correct if there
is a matching lens profile, or the manual Perspective correction which
requires some understanding how the filter is used. You also have options for Fish
Eye lens correction, or full Spherical correction.

Using the Adaptive Wide Angle filter, manual Perspective correction you
can use any number of distorted lines which should be straight for
correction.
Understand that with an Ultra Wide Angle lens the greatest distortion is
going to be away from the center line, and over correction can induce
unwanted distortion of straight lines in the center of the image.

Good Luck.

BTW: What WA lens and camera combination are you using?

Thank you.

I have PhotoShop 6

Is that PS6 (very old), or PS CS6?

I have just installed Photoshop CC 2015 on the other computer.

PS CC 2015?? PS CC is currently PS CC 2018. Are you subscribing to Adobe CC
which will give you the current editions of PS CC 2018 and LR CCC 2018?

(These two have the RAW processors)

So does PS CS6 if that was what you were talking about.

I use several cameras:
Olympus E500 (Usually the kit Lens)
Olympus E5 (Wide Angle Zuiko lenses)
Smart phone
A Panasonic Lumix (fixed lens with zoom)

OK, but how wide, what focal lengths?


The kit lenses of Olympus do rather well for me. For small rooms I
use the Zuiko 7 - 14 F4. All 2/3 of course.


OK, that is a fairly nice WA.


I use jpegs normally, but RAW for contrasty group shots)

Then you are wasting all that RAW can provide.

The straighten tool is faster to use than the others,

The straighten tool does nothing to correct wide angle lens distortion, it
will only straighten undistorted vertical or horizontal lines. To correct WA
distorted lines you will need to use either the Guided Transform tool found
in the lens correction panel in ACR or Lightroom, or the Adaptive Wide Angle
Filter in Photoshop.


One loses a fair amount of the edges with distortion correction. But
I have used these.


So? Do you want to straighten a vertical, or horizon in the image, or are you
trying to fix diverging/converging lineds due to WA lens distortion?

If all you are trying to do is fix a horizon, or straighten a vertical, then
use the straighten tool on a horizontal line, or a vertical line closest to
the center. Just understand that none of the WA lens distortion is going to
be corrected. Also with either straightening, or distortion correction there
can be data loss at corners, and/or edges, which can be fixed if you check
the “Constrain to Crop” box, or use auto fill.

The Transform tool (in ACR lens correction/Lightroom Transform) will actually
do a much better job of straightening.

I would suggest that you check on some of the video tutorials which are
available on this subject.


....now I'm all confused again, but I promise to try harder. I'm just
a snapshooter at family functions, and I specialize in candid shots.
Also in correcting downloaded sundry images. Recenrly I've had to
produce an A3 drawing for the fire department with labelling,colored
pictograms of extinguishers, exit/entry signs, not to mention
hosereels and hydrants.
I have the building drawing but it needed alteration like inserting
stores and deleting walls. Hence the ''eraser'' tool, the ''pen''
tool, and the difficult cutout to layer business because downloaded
pictograms have to cut out from their background and saved using the
''lasso'' tool (not forgetting to ''inverse'' and create ''layer 0'')
that caused endless frustration. It all takes hours & hours.

  #18  
Old April 24th 18, 03:00 AM posted to rec.photo.digital
Savageduck[_3_]
external usenet poster
 
Posts: 16,487
Default The Photoshop "Straighten Tool"?

On Apr 23, 2018, Peter Jason wrote
(in ):

On Sun, 22 Apr 2018 20:40:19 -0700, Savageduck
wrote:

On Apr 22, 2018, Peter Jason wrote
(in ):

On Sun, 22 Apr 2018 18:17:39 -0700, Savageduck
wrote:


Snipped ground already covered


So? Do you want to straighten a vertical, or horizon in the image, or are
you trying to fix diverging/converging lines due to WA lens distortion?

If all you are trying to do is fix a horizon, or straighten a vertical, then
use the straighten tool on a horizontal line, or a vertical line closest to
the center. Just understand that none of the WA lens distortion is going to
be corrected. Also with either straightening, or distortion correction there
can be data loss at corners, and/or edges, which can be fixed if you check
the “Constrain to Crop” box, or use auto fill.

The Transform tool (in ACR lens correction/Lightroom Transform) will
actually do a much better job of straightening.

I would suggest that you check on some of the video tutorials which are
available on this subject.


...now I'm all confused again, but I promise to try harder.


That is OK, but if you have Photoshop and/or Lightroom available it is best
to get an understanding of how the most commonly used tools are used, and one
of the best ways to do that is to take a look at some of the many video
tutorials. Those will give you a good idea of when to use those tools, and
some insight into some of the intricacies.

Youtube can be a good source, otherwise I recommend taking a look at videos
from Julieanne Kost, Matt Kloskowski, and Terry White.
http://blogs.adobe.com/jkost/photoshop-training-videos

https://www.youtube.com/results?search_query=julieanne+kost

http://mattk.com/category/photoshop/

Terry White deals in all things Adobe, so a little digging for Photostop
specific stuff is needed.

https://www.youtube.com/user/terrywhitetechblog

I included these in a response to PeterN:

https://www.youtube.com/watch?v=LMm0AD9Brp8
https://www.youtube.com/watch?v=Vjg4RtV4UAk
https://vimeo.com/205460101
https://www.youtube.com/watch?v=ywmOWmkSv7o

....and if you are using Lightroom:

https://helpx.adobe.com/lightroom/ho...ection-guided-
upright.html

I'm just a snapshooter at family functions, and I specialize in candid shots.


So you are one of those guys responsible for those embarassing Thanksgiving
and Xmas shots. ;-)


Also in correcting downloaded sundry images. Recenrly I've had to
produce an A3 drawing for the fire department with labelling,colored
pictograms of extinguishers, exit/entry signs, not to mention
hosereels and hydrants.
I have the building drawing but it needed alteration like inserting
stores and deleting walls. Hence the ''eraser'' tool, the ''pen''
tool, and the difficult cutout to layer business because downloaded
pictograms have to cut out from their background and saved using the
''lasso'' tool (not forgetting to ''inverse'' and create ''layer 0'')
that caused endless frustration. It all takes hours & hours.


That is of course a totally different task than the one posed in your OP.
However, even for that there are tools which will make things easier. For
example, the Vanishing Point Filter can make the placement of objects such as
windows, shelves, etc. simpler, especially if you need to maintain
proportions, and perspective.

https://www.youtube.com/results?sear...er+photos hop
+cc

--

Regards,
Savageduck

  #19  
Old April 24th 18, 05:22 PM posted to rec.photo.digital
android
external usenet poster
 
Posts: 3,854
Default The Photoshop "Straighten Tool"?

On 2018-04-23 16:09:27 +0000, PeterN said:

On 4/22/2018 6:23 PM, Peter Jason wrote:
Wide-angle photos have a confusing number of lines.

Which one should be used for straightening the image?

One in the very center perhaps?


When I have several lines, I pick the one I that I feel should be
straight, of course that may vary with the image. I your camera and
lens is listed, The ACR filter has a setting for automatic adjustment.
As nospam suggested, You can also use the WA adjustment tool in PS.


I ordered a boxed DxO ViewPoint 3 today, almost half price compared to
their website. I'm very happy with the trial look forward to have
access to it in Photoshop and Photoline on a longterm basis.
--
teleportation kills

  #20  
Old April 24th 18, 05:34 PM posted to rec.photo.digital
android
external usenet poster
 
Posts: 3,854
Default The Photoshop "Straighten Tool"?

On 2018-04-23 16:09:27 +0000, PeterN said:

On 4/22/2018 6:23 PM, Peter Jason wrote:
Wide-angle photos have a confusing number of lines.

Which one should be used for straightening the image?

One in the very center perhaps?


When I have several lines, I pick the one I that I feel should be
straight, of course that may vary with the image. I your camera and
lens is listed, The ACR filter has a setting for automatic adjustment.
As nospam suggested, You can also use the WA adjustment tool in PS.


I ordered a boxed DxO ViewPoint 3 today, almost half price compared to
their website. I'm very happy with the trial look forward to have
access to it in Photoshop and Photoline on a longterm basis.
--
teleportation kills

 




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