In the SilverFast official guide, it is written that skin tones will fall in the range of 5/4/3 to 5/3/2. What does that mean? I know it means red > green > blue but what do the numbers mean? Is each level suppose to be divisable by 5/3/2 and so fourth what.
It's important to me, I'm used to figuring this out in CMYK in which case, it is preferable to have the cyan half the value of the magenta/yellow and magenta and yellow are equal. But what does it all mean in RGB?
Skin Tone Ratios
Moderator: LSI_Moeller
Dear mgilvey
as the guide had been written by the training specialist Dr. Taz Tally, I would advise you might follow his invitation from p. ix and ask him directly (mail addresses were given on that page).
However, as some other users might take interest in the reply, it would be a fine thing if you could post the answer here, too (given Dr. Tally gives his permission).
as the guide had been written by the training specialist Dr. Taz Tally, I would advise you might follow his invitation from p. ix and ask him directly (mail addresses were given on that page).
However, as some other users might take interest in the reply, it would be a fine thing if you could post the answer here, too (given Dr. Tally gives his permission).
Dear mgilvey
after reading the passage in his book, I guess what Mr. Tally means is that when analyzing parts of an image that depict skin, the values are usually about 42% red (5 of 12=5+4+3) to 50% (5 of 10=5+3+2), 33% green (either 4 of 12 or 3 of 10), 20% (2 of 10) to 25% blue (3 of 12).
Actually, I not sure if that's really true, depending largely on what persons you take pictures of and if their sun-tanned, or computer nerds, what light source is used, a.s.o.
However, it also might well be that I can't reach the heights of the photographical mind and thus I'd rather not start a philosophical debate here...
after reading the passage in his book, I guess what Mr. Tally means is that when analyzing parts of an image that depict skin, the values are usually about 42% red (5 of 12=5+4+3) to 50% (5 of 10=5+3+2), 33% green (either 4 of 12 or 3 of 10), 20% (2 of 10) to 25% blue (3 of 12).
Actually, I not sure if that's really true, depending largely on what persons you take pictures of and if their sun-tanned, or computer nerds, what light source is used, a.s.o.
However, it also might well be that I can't reach the heights of the photographical mind and thus I'd rather not start a philosophical debate here...
Hi guys,
I just sent a message to Taz (author of SilverFast, The Official Guide). Here is what I wrote:
Hi Taz,
I recently purchase SilverFast AI 6 for my el cheapo scanner and boy was I impressed. Finally, I have the same control I had with the high-end Scitex Smart340 flatbed scanner I had at work. I also purchased your book SilverFast The Official Guide and I'm loving it. I don't even want to do another scan until I finish the book! Anyway, here's my issue:
In the SilverFast official guide, it is written that skin tones will fall in the range of 5/4/3 to 5/3/2. What exactly does that mean? I know it means red > green > blue but what do the numbers mean? Is each level suppose to be divisable by 5/3/2 and so fourth or what?
What starting points would you us for:
Pale Caucasion skin:
Normal Caucasion skin:
Asian skin:
African skin:
It's important to me, I'm used to figuring this out in CMYK in which case for healthy looking normal caucasion skin, it is preferable to have the cyan half the value of the magenta/yellow and magenta and yellow are equal. If the subject is African, then add black to the same numbers. But how do I figure this out in RGB? I would prefer to scan in RGB. My background comes from print so I'm used to scanning directly into CMYK but now that most of my work is for the web and other desktop presentation, I need to retrain myself in the ways of RGB.
I just sent a message to Taz (author of SilverFast, The Official Guide). Here is what I wrote:
Hi Taz,
I recently purchase SilverFast AI 6 for my el cheapo scanner and boy was I impressed. Finally, I have the same control I had with the high-end Scitex Smart340 flatbed scanner I had at work. I also purchased your book SilverFast The Official Guide and I'm loving it. I don't even want to do another scan until I finish the book! Anyway, here's my issue:
In the SilverFast official guide, it is written that skin tones will fall in the range of 5/4/3 to 5/3/2. What exactly does that mean? I know it means red > green > blue but what do the numbers mean? Is each level suppose to be divisable by 5/3/2 and so fourth or what?
What starting points would you us for:
Pale Caucasion skin:
Normal Caucasion skin:
Asian skin:
African skin:
It's important to me, I'm used to figuring this out in CMYK in which case for healthy looking normal caucasion skin, it is preferable to have the cyan half the value of the magenta/yellow and magenta and yellow are equal. If the subject is African, then add black to the same numbers. But how do I figure this out in RGB? I would prefer to scan in RGB. My background comes from print so I'm used to scanning directly into CMYK but now that most of my work is for the web and other desktop presentation, I need to retrain myself in the ways of RGB.
Greeting all,
I finally heard from Taz and here is what I learned:
I WROTE: In the SilverFast official guide, it is written that skin tones will fall in the range of 5/4/3 to 5/3/2. What exactly does that mean? I know it means red > green > blue but what do the numbers mean? Is each level suppose to be divisable by 5/3/2 and so fourth or what?
????TAZ WROTE: These are ratios of R to G to B. The actual numbers will vary with the tonal range you are sampling.????
I WROTE: What starting points would you us for:
????TAZ WROTE:
Pale Caucasion skin: 5/3/2 (pale makes no difference to ratios)
Normal Caucasion skin: 5/3/2
Asian skin: 5/4/3
African skin:5/3/2
????
Since I didn't quite understand what appeared to not be obvious to me I WROTE to Taz: I'm guessing that if I read a red value that is 125r, the g value should be 100 and the b value should be about 33?
125/5=25
100/4=25
100/3=33.3333
Is that correct or am I completely off?
????TAZ WROTE:
5/4/3 = 125/100/75
5x25 = 125
4x25=100
3x25=75
????
Here ends the conversation and there you have it.
I finally heard from Taz and here is what I learned:
I WROTE: In the SilverFast official guide, it is written that skin tones will fall in the range of 5/4/3 to 5/3/2. What exactly does that mean? I know it means red > green > blue but what do the numbers mean? Is each level suppose to be divisable by 5/3/2 and so fourth or what?
????TAZ WROTE: These are ratios of R to G to B. The actual numbers will vary with the tonal range you are sampling.????
I WROTE: What starting points would you us for:
????TAZ WROTE:
Pale Caucasion skin: 5/3/2 (pale makes no difference to ratios)
Normal Caucasion skin: 5/3/2
Asian skin: 5/4/3
African skin:5/3/2
????
Since I didn't quite understand what appeared to not be obvious to me I WROTE to Taz: I'm guessing that if I read a red value that is 125r, the g value should be 100 and the b value should be about 33?
125/5=25
100/4=25
100/3=33.3333
Is that correct or am I completely off?
????TAZ WROTE:
5/4/3 = 125/100/75
5x25 = 125
4x25=100
3x25=75
????
Here ends the conversation and there you have it.
Who is online
Users browsing this forum: No registered users and 1 guest