Select all similar grey tones in a pixelated bw image

[Le0nard]

Hello,

my question seems to be easy, but I didn't find any way to do it...

Imagine having a pixelated image in affinity photo which is reduced to 20 grey tones (also look at my other topic here). Now you want to select all "pixels/color blocks" of one similar tone and change the color.

How is this possible?

Background of my question is that I need to create 20 new documents, each with the focus on one shade of grey (I want to focus this shade by color it pink).

Hope you can understand!

Thank you so much and greetings from Germany,

Leonard

[NotMyFault]

Hi,

lots of possible ways.

add a fill layer in pink below.

then use blend range to make one small range of lightness values transparent so that the pink shows through.

You can alternatively use the live luminosity mask layer.

the most flexible method would be to use a live procedural texture filter to make a range of lightness transparent.

 

[NotMyFault]

1 minute ago, NotMyFault said:

Hi,

lots of possible ways.

add a fill layer in pink below.

then use blend range to make one small range of lightness values transparent so that the pink shows through.

You can alternatively use the live luminosity mask layer.

the most flexible method would be to use a live procedural texture filter to make a range of lightness transparent.

 

Below I used blue as you already marked some areas as pink

[NotMyFault]

Or add

• a fill layer, color panel set to hsl, saturation 0
• set blend mode to difference
• add threshold adjustment, set to 3%
• add invert adjustment 
• select fill layer
• slide through lightness values. Only colors within 3% range shown white

with help of channels mixer adjustment, you can create any color from the white pixels, or map them to alpha channel to use as mask

[NotMyFault]

[NotMyFault]

recolor grey shades to pink.afphoto

[NotMyFault]

13 hours ago, Le0nard said:

Hello,

my question seems to be easy, but I didn't find any way to do it...

Imagine having a pixelated image in affinity photo which is reduced to 20 grey tones (also look at my other topic here). Now you want to select all "pixels/color blocks" of one similar tone and change the color.

How is this possible?

Background of my question is that I need to create 20 new documents, each with the focus on one shade of grey (I want to focus this shade by color it pink).

Hope you can understand!

Thank you so much and greetings from Germany,

Leonard

Hallo Leonard, kannst Du erklären wozu du diese Dateien am Ende benötigst? 
die vorliegende Pixel-Datei ist leider nicht gut geeignet, weil an den Kanten Anti-aliasing vorhanden ist, und die Grautöne dort mit dem schwarzen Hintergrund vermischt werden. zu erkennen ist auch, dass die Farben in den Kreisen nicht exakt die Fläche füllen.

Ein anderes Vorgehen würde einfacher und bessere Ergebnisse liefern (z.B. Könnte man mit Rechtecken arbeiten, und erst in einem Späteren Schritt die s Haarzöpfe Maske). Das wäre viele Probleme an den Kanten der Kreise vermeiden.

Ich habe auch den anderen Thread gelesen, der hat sich aber über die Zeit dynamisch entwickelt und mir ist grad nicht klar, welches Vorgehen Du zum Schluss anstrebst.

 

VG NMF