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Posted (edited)

***SOLVED: the image was zoomed out, so the application of noise in the actual image looked different from the preview which shows the noise at 1:1 scale. Evidently the noise preview pane should show the noise as it would appear at whatever scale is selected in the filter.

Filters > Noise > Add Noise...

On an imported image which was rasterized, the settings in the Add Noise filter are correctly previewed but aren't actually applied to the image on clicking "Apply".

Even at 100% noise in the preview it looks like it's only adding about 50%. On darker images this discrepancy is even more noticeable.

apple-preview.jpg

apple-raw.jpg

apple-noise applied.jpg

Edited by orangefizz
Filter pane shows noise at different scale

Mac Mini (2018) - OS X 10.15.7 - 3 GHz 6-Core Intel Core i5 32 GB 2667 MHz DDR4 Intel UHD Graphics 630 1536 MB 

Posted
10 minutes ago, orangefizz said:

image.jpeg.98a3ed5495d00eadb503913c346cc601.jpeg

Are both of those at 100% Zoom? (Ctrl/Cmd + 1)

-- 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
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Posted

One is what the preview pane displays, the other is the image at the same zoom level. And that's exactly my point here: the filter *IS* applying 100% noise, but in the preview pane it shows the noise "grains" much much larger than they will actually appear once applied. Seems there should be a scaling function in the preview pane to account for this scaling issue otherwise it's rather misleading.

Mac Mini (2018) - OS X 10.15.7 - 3 GHz 6-Core Intel Core i5 32 GB 2667 MHz DDR4 Intel UHD Graphics 630 1536 MB 

Posted
12 minutes ago, orangefizz said:

One is what the preview pane displays, the other is the image at the same zoom level. And that's exactly my point here: the filter *IS* applying 100% noise, but in the preview pane it shows the noise "grains" much much larger than they will actually appear once applied. Seems there should be a scaling function in the preview pane to account for this scaling issue otherwise it's rather misleading.

I'm not sure what you mean by "the Preview Pane". The effect of the filter is shown directly on the image.

You must be at 100% Zoom when adjusting the filter to see it accurately.

-- 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 18.3.1, Apple Pencil 2, Magic Keyboard 
Mac:  2023 M2 MacBook Air 15", 16GB memory, macOS Sequoia 15.0.1

Posted

Shouldn't the previewed effect be scaled at whatever zoom level I'm at? Why show the user "80% noise" at 50% zoom if the *actual* applied noise looks nothing like that at 50%. Only once the filter is applied does the "true" amount of noise—at the current zoom state—get rendered correctly.

Mac Mini (2018) - OS X 10.15.7 - 3 GHz 6-Core Intel Core i5 32 GB 2667 MHz DDR4 Intel UHD Graphics 630 1536 MB 

Posted

Others have suggested this could be improved, and there are probably Feature Requests asking for that, but for now Serif have said that it is working as it was designed to work.

You need to be at a 100% Zoom to judge the effects of the filter.

-- 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 18.3.1, Apple Pencil 2, Magic Keyboard 
Mac:  2023 M2 MacBook Air 15", 16GB memory, macOS Sequoia 15.0.1

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