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Posted

Just to make sure: Are you aware that the Crop Tool has a Straighten function? It's not automatic, but is quite simple to use.

-- Walt
Designer, Photo, and Publisher V1 and V2 at latest retail and beta releases
PC:
    Desktop:  Windows 11 Pro 23H2, 64GB memory, AMD Ryzen 9 5900 12-Core @ 3.00 GHz, NVIDIA GeForce RTX 3090 

    Laptop:  Windows 11 Pro 23H2, 32GB memory, Intel Core i7-10750H @ 2.60GHz, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU.
    Laptop 2: Windows 11 Pro 24H2,  16GB memory, Snapdragon(R) X Elite - X1E80100 - Qualcomm(R) Oryon(TM) 12 Core CPU 4.01 GHz, Qualcomm(R) Adreno(TM) X1-85 GPU
iPad:  iPad Pro M1, 12.9": iPadOS 18.2.1, Apple Pencil 2, Magic Keyboard 
Mac:  2023 M2 MacBook Air 15", 16GB memory, macOS Sequoia 15.0.1

Posted

Yes, but I've seen other programs having an auto straighten function which I think would be quite useful, although the crop tool's straighten function is also quite good.

Posted

How could you guarantee that an auto straighten would latch onto the appropriate not-quite-horizontal line to straighten?

John

Windows 11, Affinity Photo 2.4.2 Designer 2.4.2 and Publisher 2.4.2 (mainly Photo).

CPU: Intel Core i5 8500 @ 3.00GHz. RAM: 32.0GB  DDR4 @ 1063MHz, Graphics: 2047MB NVIDIA GeForce GTX 1050

Posted
3 hours ago, John Rostron said:

How could you guarantee that an auto straighten would latch onto the appropriate not-quite-horizontal line to straighten?

I wondered about that, too.

Thinking further, I suppose if the program found a bunch of "lines" that were parallel, but not quite horizontal (or vertical) it could assume the photo should be straightened to make them horizontal (or vertical, as appropriate). But I'm not sure how often that would work, in practice.

-- Walt
Designer, Photo, and Publisher V1 and V2 at latest retail and beta releases
PC:
    Desktop:  Windows 11 Pro 23H2, 64GB memory, AMD Ryzen 9 5900 12-Core @ 3.00 GHz, NVIDIA GeForce RTX 3090 

    Laptop:  Windows 11 Pro 23H2, 32GB memory, Intel Core i7-10750H @ 2.60GHz, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU.
    Laptop 2: Windows 11 Pro 24H2,  16GB memory, Snapdragon(R) X Elite - X1E80100 - Qualcomm(R) Oryon(TM) 12 Core CPU 4.01 GHz, Qualcomm(R) Adreno(TM) X1-85 GPU
iPad:  iPad Pro M1, 12.9": iPadOS 18.2.1, Apple Pencil 2, Magic Keyboard 
Mac:  2023 M2 MacBook Air 15", 16GB memory, macOS Sequoia 15.0.1

Posted
2 hours ago, walt.farrell said:

a bunch of "lines

I would guess that a typical scene would have just one target horizontal line, the horizon. If this was sufficiently distinct, then this could be the basis of a straightening. However it is likely that the only really level horizons would be seascapes.

John

Windows 11, Affinity Photo 2.4.2 Designer 2.4.2 and Publisher 2.4.2 (mainly Photo).

CPU: Intel Core i5 8500 @ 3.00GHz. RAM: 32.0GB  DDR4 @ 1063MHz, Graphics: 2047MB NVIDIA GeForce GTX 1050

Posted
37 minutes ago, John Rostron said:

I would guess that a typical scene would have just one target horizontal line, the horizon. If this was sufficiently distinct, then this could be the basis of a straightening. However it is likely that the only really level horizons would be seascapes.

John

Just want to point out that the Canadian prairie is pool table flat. But yes the horizon is hard/impossible to find in a lot of my pictures due to pesky trees and mountains.

Mac Pro (Late 2013) Mac OS 12.7.6 
Affinity Designer 2.5.7 | Affinity Photo 2.5.7 | Affinity Publisher 2.5.7 | Beta versions as they appear.

I have never mastered color management, period, so I cannot help with that.

Posted (edited)

I'm not exactly sure how this would work, but the photos app on MacOS has the feature I'm talking about... and it works quite well even on photos without a super distinct horizon. Maybe it's included in metadata, idk?

Edited by Tirami

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