Luminous Landscape Forum

Raw & Post Processing, Printing => Adobe Lightroom Q&A => Topic started by: ariaaudio on January 02, 2008, 11:10:50 am

Title: LR's % to RGB numbers?
Post by: ariaaudio on January 02, 2008, 11:10:50 am

LR displays RGB values in percentages. It's a straight conversion to RGB bits, isn't it?

50%/50%/50% (RGB) = 128/128/128?

Can LR be set up to display RGB in bits?

Title: LR's % to RGB numbers?
Post by: Tim Gray on January 02, 2008, 02:19:07 pm

Quote

LR displays RGB values in percentages. It's a straight conversion to RGB bits, isn't it?

50%/50%/50% (RGB) = 128/128/128?

Can LR be set up to display RGB in bits?
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Assuming an 8 bit space, which, as I recall is why it's % and not bits since (most) RAWs are 12 or 14 not 8.

Title: LR's % to RGB numbers?
Post by: Panopeeper on January 02, 2008, 02:27:22 pm

Quote

Assuming an 8 bit space, which, as I recall is why it's % and not bits since (most) RAWs are 12 or 14 not 8.

You can have 16bit, even 32bit RGB values. However, the raw pixel values are not RGB components.

Title: LR's % to RGB numbers?
Post by: ariaaudio on January 03, 2008, 10:26:40 am

Oh yeah, duh, we have more bits in RAW and other formats.

Okay, setting aside the total number of available bits for the moment, is the relationship a linear one? IOW, if LR reports 50% blue, does that mean that 50% of the available blue bits are turned on?