Where is the Preset?

[Petar Petrenko]

Hi,

I am on Windows and just created a "Black and White Adjustment" preset, but I can't find it anywhere when I wanted to applied it on a color photo.

[Petar Petrenko]

I've just watched Affinity Revolution video where they suggest these values for accurate converting color photos into B&W:

R: 30
Y: 89
G: 59
C: 70
B: 11
M: 41

[Ron P.]

1 hour ago, NNN said:

I've just watched Affinity Revolution video where they suggest these values for accurate converting color photos into B&W:

R: 30
Y: 89
G: 59
😄 70
B: 11
M: 41

Is that the look for your image(s) you want?

I say that because people tend to focus on numbers. Number settings are ok, but they don't work for all images. I loaded B&W adjustment with those settings on one of my color images and it didn't look right for me. Use your eyes, pay more attention to the image on the canvas. If you notice in these tutorial videos, the instructor will be moving the sliders to their extremes. They're looking at the image, to see if the movement is affecting the image, and how and where.

[Petar Petrenko]

The RGB values you see here are form the period introducing color TVs. There was a problem watching color programs on B&W TVs so the experts have to do something. After some time experimenting they found the values I put here.

[Petar Petrenko]

 

[Old Bruce]

2 hours ago, NNN said:

Hi,

I am on Windows and just created a "Black and White Adjustment" preset, but I can't find it anywhere when I wanted to applied it on a color photo.

I had the same problem as you, but that is because I keep the Presets panel off. Do as @Hens suggested and make a preset with a useful name (mine is Bruce's B&W) then call up the Presets panel and you can click on it to apply it. I wish there was a button in the various Adjustments panels to bring up the presets, or a dropdown menu with them.

For what It is worth I too use those numbers you put up as a starting point for my B&W conversions. I find them to be quit a bit better than 100 100 100... as a starting point. I can then make the different colours in the image lighter or darker.

[walt.farrell]

4 hours ago, Old Bruce said:

I had the same problem as you, but that is because I keep the Presets panel off.

Presets panel? Do you perhaps mean the Adjustments panel?

[Old Bruce]

Just now, walt.farrell said:

Presets panel? Do you perhaps mean the Adjustments panel?

Yes, shows how rarely I use it.

[R C-R]

On 12/10/2021 at 6:09 AM, NNN said:

I've just watched Affinity Revolution video where they suggest these values for accurate converting color photos into B&W:

R: 30
Y: 89
G: 59
😄 70
B: 11
M: 41

They are not really "accurate" for several reasons, one of which is those 3 "magic" R/G/B values are just an average of the relative sensitivity of a large sample of people, but even for one person that can vary depending on their age, eye fatigue, time of day, & several other factors. Also, eye sensitivity varies depending on where in the spectrum the color is located, because there is considerable overlap in the sensitivity of each of the 3 color receptors, so many shades will be sensed strongly by one sensor & weakly by another.

Lots more about this at https://www.cambridgeincolour.com/tutorials/color-perception.htm

As you can see from that, there are wavelengths where a typical human eye is equally sensitive to red & blue green.

So really, the 'magic' values are a good starting point but as others have said you probably will need to tweak them to get something you are happy with.

Edited December 11, 2021 by R C-R
Corrected 'blue' to 'green'