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Black and White no grey scale


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I have asked on the forum how to remove grey scale to produce a purely black and white image. The answer  is , it is not possible . Although photo is good at photo adjustment, it lacks the special effects of artistic filters of photoshop for this and other art effects such as pen and ink facsimiles. 

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I think that @ralex's original problem has been solved in his original thread in Questions.

 

This does not resolve the continued absence of 1-bit capabiliies in Affinity. Could I add my support for this facility.

 

John

Windows 10, Affinity Photo 1.10.5 Designer 1.10.5 and Publisher 1.10.5 (mainly Photo), now ex-Adobe CC

CPU: AMD A6-3670. RAM: 16 GB DDR3 @ 666MHz, Graphics: 2047MB NVIDIA GeForce GT 630

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5 hours ago, John Rostron said:

I think that @ralex's original problem has been solved in his original thread in Questions.

 

This does not resolve the continued absence of 1-bit capabiliies in Affinity. Could I add my support for this facility.

 

John

 

I am not familiar with 1-bit capabilities. I assume it is a picture composed of either black or white pixels.

If that is the case, did you try the threshold adjustment? If set to 50% it looks like something into that direction.

 

I am really curious about that thing. Let me know what you think about threshold adjustment and what is missing to make APh fully 1-bit compatible.

Thanks!

d.

Affinity Designer 1 & 2   |   Affinity Photo 1 & 2   |   Affinity Publisher 1 & 2
Affinity Designer 2 for iPad   |   Affinity Photo 2 for iPad   |   Affinity Publisher 2 for iPad

Windows 11 64-bit - Core i7 - 16GB - Intel HD Graphics 4600 & NVIDIA GeForce GTX 960M
iPad pro 9.7" + Apple Pencil

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My impression is that the request involves supporting files (open, export) with a one-bit per pixel format.

 

The threshold format you're talking about, dominik, would result in an 8-bit per pixel file where each set of 8 bits has the value 0 or 1, I think.

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

    Laptop:  Windows 11 Pro, version 23H2, 32GB memory, Intel Core i7-10750H @ 2.60GHz, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU.
iPad:  iPad Pro M1, 12.9": iPadOS 17.4.1, Apple Pencil 2, Magic Keyboard 
Mac:  2023 M2 MacBook Air 15", 16GB memory, macOS Sonoma 14.4.1

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There is no 1-bit colour space in Affinity (and yes, it may not be called color space..).

You can make image appear to have only black or white using threshold filter. You can export after that to 1-bit format like gif or png. Generally it seems to create pretty good 1-bit images. 

I would recommend using threshold filter always in this work flow as having any non black or white pixels (like antialiased area borders) will produce dithering to image. Export to 1-bit in Affinity always uses dither, there is no way to turn it off.

Real 1-bit work space is needed, this export thing is not a solution but it helps some.

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7 hours ago, walt.farrell said:

The threshold format you're talking about, dominik, would result in an 8-bit per pixel file where each set of 8 bits has the value 0 or 1, I think.

 

 

15 minutes ago, Fixx said:

Real 1-bit work space is needed, this export thing is not a solution but it helps some.

 

Thank you guys for helping me out here. Now I understand that it some sort of 'looks like' 1-bit but in fact is something different :)

 

d.

Affinity Designer 1 & 2   |   Affinity Photo 1 & 2   |   Affinity Publisher 1 & 2
Affinity Designer 2 for iPad   |   Affinity Photo 2 for iPad   |   Affinity Publisher 2 for iPad

Windows 11 64-bit - Core i7 - 16GB - Intel HD Graphics 4600 & NVIDIA GeForce GTX 960M
iPad pro 9.7" + Apple Pencil

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I use 1-bit for scanning old(ish) music for cleaning up. I might use 8-bit for intermediate processes, but I use 1-bit for input and export. For this, I have to use my old copy of Photoshop CS5.

John

Windows 10, Affinity Photo 1.10.5 Designer 1.10.5 and Publisher 1.10.5 (mainly Photo), now ex-Adobe CC

CPU: AMD A6-3670. RAM: 16 GB DDR3 @ 666MHz, Graphics: 2047MB NVIDIA GeForce GT 630

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7 hours ago, Fixx said:

You can make image appear to have only black or white using threshold filter. You can export after that to 1-bit format like gif or png. Generally it seems to create pretty good 1-bit images.

I do not see a way in Affinity Photo to export a 1bpp file, even exporting to gif or png. The file may have only two colors, which could technically be saved as 1bpp, but as far as I can see the minimum bits per pixel that Photo will use for export is 8bpp.

Edit: However, Affinity Photo does seem to open 1bpp png files successfully, at least.

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

    Laptop:  Windows 11 Pro, version 23H2, 32GB memory, Intel Core i7-10750H @ 2.60GHz, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU.
iPad:  iPad Pro M1, 12.9": iPadOS 17.4.1, Apple Pencil 2, Magic Keyboard 
Mac:  2023 M2 MacBook Air 15", 16GB memory, macOS Sonoma 14.4.1

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14 hours ago, walt.farrell said:

I do not see a way in Affinity Photo to export a 1bpp file, even exporting to gif or png. The file may have only two colors, which could technically be saved as 1bpp, but as far as I can see the minimum bits per pixel that Photo will use for export is 8bpp.

Edit: However, Affinity Photo does seem to open 1bpp png files successfully, at least.

Ah.. there is something fishy in exported files. Seems png has full indexed greyscale palette, when gif is also 8-bit indexed but only two slots in color table are used. Weird.

 

Yes AP can open but the opened image is RGB.

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