Blending layer in Luminosity mode without the details (only for transfer of the "contrast")?

Forum|Forum|2 years ago
September 1, 2023
2 답변들
1221 조회

Hey, this may be a novice question, but similar to the "color", "saturation", and "hue" blending modes, is there a way to just get the "luminance" information of a given layer/image without the actual details of it to apply onto whatever bas layer/image beneath it?

Thanks in advance!

이 주제는 답변이 닫혔습니다.

T

Typhoon859작성자

Inspiring

I found a way to somewhat do it. Not ideal but it sort of does the job (for my current use/application).

Make a duplicate of the base layer then merge it with the layer you would want in Luminosity mode.
Copy that image into a new tab/project.
From the Neural Filters, use "Color Transfer" with this image onto the original base layer and bump the luminosity up to, seemingly, max to match the contrast/luminosity of the original image with the originally intended other image (or otherwise adjust the slider to your liking).

This works because you've essentially made the colors the same through the initial blend.

If anyone has a more direct solution that doesn't inolve Neural Filters, please let me know >.<

Thanks again!

Stephen Marsh

Community Expert

Duplicate the layer or file, fill with a neutral such as white, black or any gray level in color blend mode.

T

Typhoon859작성자

Inspiring

I was so ready to have my mind blown just now, but either I'm not doing it right or I don't get it.

I have two images (of the same subject/bacground but differently mastered), one of which I want to get the luminosity data from and trasfer onto the other. The one I want to get it from I duplicated and filled with grey in color blend mode which turned it black and white... and now what? Sorry if I somehow didn't follow but if you could further elaborate, I would really appreciate it.

Thanks again.

Stephen Marsh

Community Expert

Yes, just changing it to the "Luminosity" blend mode still blends (or, actually, fully replaces) the details of the image in the base. If anything, what it's doing is taking the chroma/color data from the base and transfering up the the image in the "Luminosity" mode/layer above, as if the base were layered on top in "Color" mode (in fact, I just tried that and that's exactly what it's like or effectively does: the result is identical).

Yes, I am in fact looking to separate/extract the luminosity component and then blend that onto an image (which is actually how I thought the "Luminosity" blend mode would be by default).

Yes, just changing it to the "Luminosity" blend mode still blends (or, actually, fully replaces) the details of the image in the base. If anything, what it's doing is taking the chroma/color data from the base and transfering up the the image in the "Luminosity" mode/layer above, as if the base were layered on top in "Color" mode (in fact, I just tried that and that's exactly what it's like or effectively does: the result is identical).

Yes, I am in fact looking to separate/extract the luminosity component and then blend that onto an image (which is actually how I thought the "Luminosity" blend mode would be by default).

By @Typhoon859

OK, so I'm now officially confused!

99% of the time, you can just layer any content and change to luminosity blend mode, and you will indeed have the luminosity component contributing to the image without the colour.

But if you wish to "extract" the luminosity component, then that is different. Photoshop refers to the single channel gray values of the luminosity component in a few areas, such as the RGB composite curve, or the blend if sliders.

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