Sounds like 'barrel distortion'
Yes, it's called Anamorphic volume deformation, and you need DxO ViewPoint to fix exactly this problem, easily (in fact, automatically). I used it embedded in DxO PhotoLab, and the corrections are applied automatically to every image I process, but it can also be used stand-alone.
I don't think any other product can do it automatically.
No, it has nothing to do with barrel distortion.
No, this has nothing to do with lens distortion or errors. It's called anamorphic volume distortion, and occurs with all ultra-wide angle images. I don't know of any cameras that can fix it.
No, only one product that I'm aware of can fix this easily and automatically, DxO ViewPoint. I'm pretty sure that no Adobe products can do it without a huge amount of manual effort.
I think you are referring to wide-angle perspective distortion, which stretches things unnaturally towards the edges of ultra-wide images.
No, this is volume distortion, which has nothing to do with perspective distortion. I know of only one tool designed to correct volume distortion; lots of tools can correct perspective distortion.
No, you can eliminate perspective distortion by being careful to keep the camera exactly horizontal when shooting. You get perspective distortion if the camera is pointing up or down, even slightly. In practice, it's hard to keep the camera exactly level, so you may then want to correct the slight perspective error in post, which is quite easy in lots of products.
Yes, that's the solution. It's designed to automatically correct this specific problem. I apply it automatically to every image I process (I have it built into DxO PhotoLab, but it can also be used stand-alone).
True, you are trading one type of distortion for another, to produce a more pleasing image.
Thank you for the valued insight and the detailed reply to the OP.
I have no idea what you are referring to as volume distortion, unless you mean perspective distortion.
Perspective distortion occurs even if the camera is level.
Yes, it's funny that it's not better known. I see many images from professional photographers that have very visible volume distortion. They just seem to be unaware of it, and also how easily to can be corrected.Thank you for the valued insight and the detailed reply to the OP.
I do not recall hearing of that type of distortion, as they say.....'every day is a school day'
No, as I've said, it's completely different to perspective distortion. You may not have heard of it, but it exists in every UWA image. Fortunately it can be corrected. Many UWA images have both forms of distortion.
You just keep repeating what you have already said, with no references or further explanation.
This is the auto correction in DXO. Not perfect but much improved for no effort. You can manually tune the result in DXO and it works best on raw images and supported lenses.I have no idea what you are referring to as volume distortion, unless you mean perspective distortion.
The development of software to automatically correct wide-angle perspective distortion is discussed in some detail in this research paper by a team at Google.
Perspective distortion occurs even if the camera is level.
Look at the shot below. The large stone balls are all spherical, but perspective distortion makes the one on the left look elongated (just like the faces in the image in the research paper I linked to above).
Of course, you can always correct (completely) perspective distortion by viewing the image from exactly the same position as the camera lens was relative to the image when it was captured. For the image above, this means that you have to enlarge the image sufficiently that you can view it with your eye on a line perpendicular to the image and through the centre of the image and with your eye at a distance from the image equal to 0.4 times the length of the image diagonal. From this position, you will see the image with exactly the same perspective as you would have seen if you looked at the scene from the camera position.
Of course, viewing images from this close is usually not convenient and then the distortion appears.
Yes, I would agree with that.
Yes, DXO does a remarkably good job for most day-to-day images. The balls have been corrected nicely.This is the auto correction in DXO. Not perfect but much improved for no effort. You can manually tune the result in DXO and it works best on raw images and supported lenses.
Ian
Yes, I agree too. I use the 'perspective distortion' term in the narrower, more normal photo editing sense of correcting converging verticals (which can happen with any image, not just wide angle images), which is quite different to dealing with the stretching that occurs at the edges of UWA images. But both are forms of the wider definition of perspective distortion.
Yes, that's what happens when you use the Diagonal mode with DxO ViewPoint's Volume deformation correction (used from within PhotoLab). This mode does a better job for organic forms and circles, but does bend straight lines towards the edges. In this case, I think that's tolerable, and in natural, outdoor scenes it's no problem at all. With architecture, it's usually better to use the Horizontal/Vertical correction mode, which leaves straight lines straight, but that doesn't work if the stretched shape is in the corners. It works very well with typical group photos, even if in front of buildings.Yes, DXO does a remarkably good job for most day-to-day images. The balls have been corrected nicely.This is the auto correction in DXO. Not perfect but much improved for no effort. You can manually tune the result in DXO and it works best on raw images and supported lenses.
Ian
It is not really a problem in this image, but you can just see the distortion of straight lines in the building on the extreme right (the verticals have a slight curve to them).
Agreed, but I think this rendering is much more pleasing than the original, with almost no effort. In fact, Ian's perfectly acceptable version could be produced automatically as a zero-click option, for a PhotoLab user who also had ViewPoint.
Thomas is exactly the thing I asking for thanks for bringing this up and I asked in local group and the reply was that it’s impossible to correct and you should you a tele lens insteadYes, it's called Anamorphic volume deformation, and you need DxO ViewPoint to fix exactly this problem, easily (in fact, automatically). I used it embedded in DxO PhotoLab, and the corrections are applied automatically to every image I process, but it can also be used stand-alone.
Here's an example I took with my A7Riii with 12-24 lens:
No volume deformation correction applied.
Automatic volume deformation correction applied.
I don't think any other product can do it automatically.
Seeor(these old videos uses an older version of the software).
. This looks amazing even if it’s not 100 perfect I think this will solve my problem. DxO Labs is the company. DxO PhotoLab is the raw developer and editor, while DxO ViewPoint is the product that includes the perspective and volume deformation correction tools. The products can be used independently, so you can buy either one or both (DxO also has other products) .Thomas is exactly the thing I asking for thanks for bringing this up and I asked in local group and the reply was that it’s impossible to correct and you should you a tele lens insteadYes, it's called Anamorphic volume deformation, and you need DxO ViewPoint to fix exactly this problem, easily (in fact, automatically). I used it embedded in DxO PhotoLab, and the corrections are applied automatically to every image I process, but it can also be used stand-alone.
Here's an example I took with my A7Riii with 12-24 lens:
No volume deformation correction applied.
Automatic volume deformation correction applied.
I don't think any other product can do it automatically.
Seeor(these old videos uses an older version of the software).
I’m sold and need to try the DXO software. Only thing I don’t really understand is the dxo viewpoint is included in dxo labs? I don’t use any software of them and I can’t just change my workflow so I thing I will be professing psd or tiff ( raw from Lightroom) but is the any diffrence. Of the viewpoint functionality on the separate software form the includd except the price is almost 3x
I never bought the ViewPoint add-on for PhotoLab, but I still have Optics Pro 9 Elite, which includes the Volume Deformation tool, so I know about its behavior.
Here's the result using the Photoshop recipe:Here's an example I took with my A7Riii with 12-24 lens:
No volume deformation correction applied.
Automatic volume deformation correction applied.
