Voronoi UI issue

[NotMyFault]

The Voronoi filter has 2 parameters, both measured in px.

For line width the unit or scaling is off. To get a 1px wide line you need to enter about 6. When entering 1 the line is barely visible (by anti-aliasing)

 

[GarryP]

In the Desktop version of Photo (1.9.2) on Windows, the Line Width doesn’t have a UOM, it’s just a value – see attached image.
I think it’s more likely to be a UI representation of some internal value used for calculation purposes rather than an actual distance across the lines.

Given that I would guess that the UOM in the iPad version may need to be removed so it doesn't cause confusion.

[NotMyFault]

In an ideal word every scale would have a reasonable UOM. As the slider already allows 1 decimal digit, it would be best to convert the old value 6 into 1px, or change the UOM to 1/6px.

Photo is full of inconsistent UOM, just look at (Windows) defringe filter (Develop/Photo Persona) - a colorful mix of px and %.

If % is used, it is unclear what the 100% reference is (100px, width of document, …)

[Chris B]

I'll feed this back to the developers! Thanks to both of you for the input  

[GarryP]

23 minutes ago, NotMyFault said:

In an ideal word every scale would have a reasonable UOM.

I’m not so sure about that “every” in a more general context, but having a UOM for something like Line Width may be useful but only if it’s meaningful.

For instance, say the Line Width value is taken by the algorithm which then calculates the circumference of a circle from that value and uses that circle to draw the lines in the filter.
The UOM wouldn’t be much use to us as increasing the Line Width would not result in a nice linear progression within the software. In other words, the “value in” would not be tied in an easily-intuited value inside the algorithm.
(It’s probably not like this at all, this is just a silly example.)

Removing the UOM would make the user do a little extra work but, at the same time, they wouldn’t depend on it being, or expect it to be, an exact value which is carried into the result.
In other words, a Line Width of 15 is thicker than a Line Width of 6 and much thinner than a Line Width of 100, but we don’t know the exact width it will be drawn by the filter so we have to experiment and get it looking nice rather than exact.

Anyway, Chris has passed it over to the developers so we will see what happens.