Imitating specific colour films?

haz

Does anyone know how to take "the look" of the colour in one type of image (or a specific image) and apply it to another? For instance, to give a 1970's faded Kodachrome look to a digital camera image?

Zillah

I can't help you with colour film, but I saved the list for B&W from the last thread:

Agfa 200X: 18,41,41
Agfapan 25: 25,39,36
Agfapan 100: 21,40,39
Agfapan 400: 20,41,39
Ilford Delta 100: 21,42,37
Ilford Delta 400: 22,42,36
Ilford Delta 400 Pro & 3200: 31,36,33
Ilford FP4: 28,41,31
Ilford HP5: 23,37,40
Ilford Pan F: 33,36,31
Ilford SFX: 36,31,33
Ilford XP2 Super: 21,42,37
Kodak Tmax 100: 24,37,39
Kodak Tmax 400: 27,36,37
Kodak Tri-X: 25,35,40

And these basic ones:
Normal Contrast: 43,33,30
High Contrast: 40,34,60
and at last a generic BW: 24,68,8. 50,50,0 and 25,75,0 are good too.



I know it doesn't help you particularily much but its a good list nonetheless.

haz

Zillah wrote:

I can't help you with colour film, but I saved the list for B&W from the last thread:

Agfa 200X: 18,41,41

I didn't see that thread - what are these values for?

I was thinking that I would need to use ICC colour profiles, and edit them to create the reverse function that would go from sRGB back to the original. But I see ICC profiles are very complicated.

prox

Thom Hogan supplies a suite of actions with his Nikon guides that include two for mimicking Velvia and Kodachrome, basically by tweaking the curves for each channel. I'm not sure if they're freely available though.

digitalbeginner

Zillah wrote:

I can't help you with colour film, but I saved the list for B&W from the last thread:

Agfa 200X: 18,41,41
Agfapan 25: 25,39,36
Agfapan 100: 21,40,39
Agfapan 400: 20,41,39
Ilford Delta 100: 21,42,37
Ilford Delta 400: 22,42,36
Ilford Delta 400 Pro & 3200: 31,36,33
Ilford FP4: 28,41,31
Ilford HP5: 23,37,40
Ilford Pan F: 33,36,31
Ilford SFX: 36,31,33
Ilford XP2 Super: 21,42,37
Kodak Tmax 100: 24,37,39
Kodak Tmax 400: 27,36,37
Kodak Tri-X: 25,35,40

And these basic ones:
Normal Contrast: 43,33,30
High Contrast: 40,34,60
and at last a generic BW: 24,68,8. 50,50,0 and 25,75,0 are good too.

These are from a post I made in a previous thread about mimicking black and white film in Photoshop Black and White Conversions. They're Channel Mixer settings (Image>Adustments>Channel Mixer). Click on "Monochrome" and then type in the values above in the Red, Green and Blue Source Channels.

prox

Are those numbers actually based on emulsion sensitivities?

digitalbeginner

They're a visual interpretation of the characteristics fo how each of the films produced a black and white print,

Dave

prox

I had a look but I can't seem to find the original thread they were posted in. I'd be interested to hear more about how those values were arrived at.

haz

prox wrote:

I had a look but I can't seem to find the original thread they were posted in. I'd be interested to hear more about how those values were arrived at.

I did some Googling and came up with these. There is an article at http://www.prime-junta.net/pont/How_to/100_Curves_and_Films/_Curves_and_films.pdf on imitating film, with the same table in it. Seems like an aesthetic guess rather than measurement.

There is another articles on colour film simulation at http://www.reflectiveimages.com/digitalvelvia.htm and they are simply increases in channel contrast. The simplest is the channel mixer using red = r+2c, g-c, b-c, green = r-c, g+2c, b-c, blue = r-c, g-c, b+2c, where c is 10 for a mild effect, 20-40 is moderate and 50 is highky saturated. The first article uses an s-curve to enhance contrast in each channel. Someone else suggested converting to LAB and putting an s-curve on the a channel. Here are some scripts for Photoshop http://www.virusphoto.com/local_links.php?catid=3 and Gimp http://www.trsqr.net/photokit/vs.html

Alien Skin Exposure http://www.alienskin.com/exposure/index.html has presets to imitate film, so do Propandia and RoC.

DadaKopf

I got Alien Skin exposure, but now it doesn't work with Photoshop CS3.

Zillah

prox wrote:

I had a look but I can't seem to find the original thread they were posted in. I'd be interested to hear more about how those values were arrived at.

Does it really matter? Try them out and see how it looks.

Spyral

Alien skin exposure is the dogs cahones. I seen it used. Im sure there are other ulterior methods of obtaining it though.:D