SSM

Would you like to react to this message? Create an account in a few clicks or log in to continue.

+3
bcauchi
skyhigh
Wayne
7 posters

    Interpreting colour from WW2 Greyscale images

    Wayne
    Wayne
    Gold
    Gold


    Posts : 1065
    Join date : 2011-01-11
    Age : 45
    Location : Smack in the middle of the Med

    Interpreting colour from WW2 Greyscale images Empty Interpreting colour from WW2 Greyscale images

    Post  Wayne Thu Nov 03, 2011 11:52 pm

    As I mentioned earlier in another thread, I am currently working on my degree thesis which is basically a piece of software that can colourise WW2 greyscale images, focusing on aircraft subjects.

    I'm looking into the types of camera/film used during WW2 to determine the factors affecting colour 'translation' to B&W.

    Ivan, you also mentioned looking into the types of chemicals used when developing the photos - another interesting avenue to explore.

    As things stand, I got to know about 2 types of film that were in use during the war: Orthochromatic and Panchromatic. The former is insensitive to red light and hence depict red as black (or very dark grey) in the developed photos. Panchromatic on the other hand is sensitive to the entire spectrum.

    I have opened this thread so that if anyone comes across any pertinent information, they have a place to share it (if they would be so kind).

    I'm have taken up this project for the benefit of the scale modelling community and would very much like for you guys to be involved in its development to make sure that it's up to SSM's HIGH standards cheers

    Thanks for taking an interest!


    _________________
    Interpreting colour from WW2 Greyscale images Images10
    Bench: Bv 141 B, Ju 87 G-2, Macchi C.205, Arado Ar.234
    Stash: Ju87D-3, Bf 109 E-3, Bf109 F-4/trop, Bf 109 G-10, He219....

    www.ScaleModelBench.com
    skyhigh
    skyhigh
    Best in Show
    Best in Show


    Posts : 4654
    Join date : 2009-07-30
    Age : 63
    Location : Qormi, Malta

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  skyhigh Fri Nov 04, 2011 4:47 pm

    So let's start moving...here we go.......


    Some colour pic, B&W will follow.......

    Interpreting colour from WW2 Greyscale images 1210


    Interpreting colour from WW2 Greyscale images Fw190_10


    Interpreting colour from WW2 Greyscale images Fw190-10
    skyhigh
    skyhigh
    Best in Show
    Best in Show


    Posts : 4654
    Join date : 2009-07-30
    Age : 63
    Location : Qormi, Malta

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  skyhigh Fri Nov 04, 2011 4:52 pm

    Interpreting colour from WW2 Greyscale images Fw190-11

    Interpreting colour from WW2 Greyscale images Fw190-12
    skyhigh
    skyhigh
    Best in Show
    Best in Show


    Posts : 4654
    Join date : 2009-07-30
    Age : 63
    Location : Qormi, Malta

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  skyhigh Fri Nov 04, 2011 4:58 pm

    Interpreting colour from WW2 Greyscale images Bundes10

    Interpreting colour from WW2 Greyscale images 1317110


    Interpreting colour from WW2 Greyscale images 5fw19010
    Wayne
    Wayne
    Gold
    Gold


    Posts : 1065
    Join date : 2011-01-11
    Age : 45
    Location : Smack in the middle of the Med

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  Wayne Mon Mar 19, 2012 6:57 pm

    As all of you know... ghax tqallajtu tisimghu... I'm working flat out on my thesis.

    The software is almost complete, I passed one of the very last hurdles this weekend and I'm pretty happy with the results.

    The final challenge is to optimise the software such that it can handle the far from ideal image quality of wartime photos.

    Here are the results of some testing I'm carrying out on illustrations:

    Original image:

    Interpreting colour from WW2 Greyscale images Origin11

    Greyscale version:

    Interpreting colour from WW2 Greyscale images Origin12

    Colourised Version using my software
    Interpreting colour from WW2 Greyscale images Colour10

    As i said it needs some fine-tuning but i'm pretty happy with the results so far. cheers


    _________________
    Interpreting colour from WW2 Greyscale images Images10
    Bench: Bv 141 B, Ju 87 G-2, Macchi C.205, Arado Ar.234
    Stash: Ju87D-3, Bf 109 E-3, Bf109 F-4/trop, Bf 109 G-10, He219....

    www.ScaleModelBench.com
    Wayne
    Wayne
    Gold
    Gold


    Posts : 1065
    Join date : 2011-01-11
    Age : 45
    Location : Smack in the middle of the Med

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  Wayne Mon Mar 19, 2012 7:48 pm

    And here the software at work on a proper photo:

    Interpreting colour from WW2 Greyscale images Bf109f11


    Interpreting colour from WW2 Greyscale images Result10

    I'll post something other than a 109 later on, but I concentrated on Luftwaffe photos as they are more challenging (mottling and all). Brit aircraft were easier to handle.


    _________________
    Interpreting colour from WW2 Greyscale images Images10
    Bench: Bv 141 B, Ju 87 G-2, Macchi C.205, Arado Ar.234
    Stash: Ju87D-3, Bf 109 E-3, Bf109 F-4/trop, Bf 109 G-10, He219....

    www.ScaleModelBench.com
    bcauchi
    bcauchi
    Best in Show
    Best in Show


    Posts : 4088
    Join date : 2009-07-30
    Age : 63
    Location : St. Julian's

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  bcauchi Wed Mar 21, 2012 6:34 pm

    Looking magnificent Wayne, what a terrific tool you are creating. Just to pass a small comment. In the opening thread you mentioned ortochromatic film which you said portrays red as a dark blackish colour. If not mistaken it was yellow and not red that was effected thus.
    Interpreting colour from WW2 Greyscale images 075_vi10
    The codes and outer ring on the roundel should be yellow and instead, they are very dark, almost black.
    Interpreting colour from WW2 Greyscale images 034_vi10
    The outer ring on this roundel should also be yellow. What do yo think?
    Wayne
    Wayne
    Gold
    Gold


    Posts : 1065
    Join date : 2011-01-11
    Age : 45
    Location : Smack in the middle of the Med

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  Wayne Thu Mar 22, 2012 9:12 pm

    Apparenly Brian, there were at least 2 types of film used during that period, one of them was insensitive to Red and the other to Yellow. So you are right in that last post, Yellow can appear black depending on the film used.

    When I started doing proper research for the project (back in December) it became apparent that creating a piece of software that could "interpret" colour from a given greyscale image is much easier said than done. There are only 255 different shades of gray much less than the total number of different shades of colour. Even given a restricted palette of colours, automatically determining the colour from a B/W image accurately is basically impossible. There are too many factors that can effect the grey-level of a colour such as shadows, weathering, photo quality and as mentioned earlier even photographic film. I read quite a number of scientific papers on the subject and all come to the same conclusion: Colourising greyscale images is an ill-poised problem which cannot be solved without some sort of external input.

    In the end, I had to go for a solution based on colour scribbles provided by the user. The system provides a restricted number of colours consistent for the subject being colourised but it is up to the user to interpret where each colour goes. Even this technique provided a considerable technical challenge and given the short amount of time I have to finish the project (4 months) I had to stop somewhere. However I'm happy with what I've achieved so far.

    Having said that I do have a couple of ideas in mind that could make this project more useful for us modellers but I'll tackle those after I graduate.

    Thanks for taking an interest though Brian, much appreciated Very Happy




    _________________
    Interpreting colour from WW2 Greyscale images Images10
    Bench: Bv 141 B, Ju 87 G-2, Macchi C.205, Arado Ar.234
    Stash: Ju87D-3, Bf 109 E-3, Bf109 F-4/trop, Bf 109 G-10, He219....

    www.ScaleModelBench.com
    slingshot392
    slingshot392
    Silver
    Silver


    Posts : 467
    Join date : 2010-02-19
    Age : 62
    Location : Minnesota, USA

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  slingshot392 Fri Mar 23, 2012 5:30 am

    I don't know a lot about photography, but wouldn't different countries have had different types of film? Don't know what black-and-white film was like before and during World War II, and I know at least with color film here in the U. S., each manufacturer would have their own specifications.

    This sounds like a great project with some very good results so far, good luck on it and I can't wait to see a finished product. I would also like to try it out on some vintage race car and hot rod photos from the 30s and 40s!
    bcauchi
    bcauchi
    Best in Show
    Best in Show


    Posts : 4088
    Join date : 2009-07-30
    Age : 63
    Location : St. Julian's

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  bcauchi Sun Mar 25, 2012 4:11 pm

    Wayne would it help to input some known colour or factor when you study a photo. What i am hinting at is using careful guess work to input the colour of for example the national markings in a photo. Their colours are known and you could input them with a certain degree of accuracy even taking weathering into account. Would this help the software to then compare the remaining shades with these and obtain approximations for the other colours?
    Wayne
    Wayne
    Gold
    Gold


    Posts : 1065
    Join date : 2011-01-11
    Age : 45
    Location : Smack in the middle of the Med

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  Wayne Sun Mar 25, 2012 5:15 pm

    In theory yes Brian. The software could analyse the rest of the image making comparisons with the "known" colours. The user would still have to identify areas in shadow however. For example, let's say a propeller is casting a shadow over a yellow cowling of a bf 109. The grey level of the area in shadow will be much darker than the rest of the cowling and the software would 99 times out of 100 mistake that darker shade with a darker colour. But yes, the software could at least provide some feedback on the similarity of grey levels and the user could then make a better decision based on what he sees and what the software sees.

    Unfortunately I did not have enough time to explore this avenue while producing my thesis but I will definitely pursue it later after I graduate.


    _________________
    Interpreting colour from WW2 Greyscale images Images10
    Bench: Bv 141 B, Ju 87 G-2, Macchi C.205, Arado Ar.234
    Stash: Ju87D-3, Bf 109 E-3, Bf109 F-4/trop, Bf 109 G-10, He219....

    www.ScaleModelBench.com
    skyhigh
    skyhigh
    Best in Show
    Best in Show


    Posts : 4654
    Join date : 2009-07-30
    Age : 63
    Location : Qormi, Malta

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  skyhigh Sun Mar 25, 2012 8:37 pm

    Wayne wrote:In theory yes Brian. The software could analyse the rest of the image making comparisons with the "known" colours. The user would still have to identify areas in shadow however. For example, let's say a propeller is casting a shadow over a yellow cowling of a bf 109. The grey level of the area in shadow will be much darker than the rest of the cowling and the software would 99 times out of 100 mistake that darker shade with a darker colour. But yes, the software could at least provide some feedback on the similarity of grey levels and the user could then make a better decision based on what he sees and what the software sees.

    Unfortunately I did not have enough time to explore this avenue while producing my thesis but I will definitely pursue it later after I graduate.


    Well then I wish you all the luck for your graduation ...and of course looking foward for all our wartime colours problems ... cheers
    Wayne
    Wayne
    Gold
    Gold


    Posts : 1065
    Join date : 2011-01-11
    Age : 45
    Location : Smack in the middle of the Med

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  Wayne Sun Mar 25, 2012 8:51 pm

    skyhigh wrote:
    Wayne wrote:In theory yes Brian. The software could analyse the rest of the image making comparisons with the "known" colours. The user would still have to identify areas in shadow however. For example, let's say a propeller is casting a shadow over a yellow cowling of a bf 109. The grey level of the area in shadow will be much darker than the rest of the cowling and the software would 99 times out of 100 mistake that darker shade with a darker colour. But yes, the software could at least provide some feedback on the similarity of grey levels and the user could then make a better decision based on what he sees and what the software sees.

    Unfortunately I did not have enough time to explore this avenue while producing my thesis but I will definitely pursue it later after I graduate.


    Well then I wish you all the luck for your graduation ...and of course looking foward for all our wartime colours problems ... cheers

    You and me both mate Very Happy


    _________________
    Interpreting colour from WW2 Greyscale images Images10
    Bench: Bv 141 B, Ju 87 G-2, Macchi C.205, Arado Ar.234
    Stash: Ju87D-3, Bf 109 E-3, Bf109 F-4/trop, Bf 109 G-10, He219....

    www.ScaleModelBench.com
    Wayne
    Wayne
    Gold
    Gold


    Posts : 1065
    Join date : 2011-01-11
    Age : 45
    Location : Smack in the middle of the Med

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  Wayne Wed Apr 18, 2012 2:08 pm

    Project is due today week!!!

    Here are some of the latest results following some last minute tweaking to the software:

    Hurricane:

    Interpreting colour from WW2 Greyscale images 00-hur10

    Interpreting colour from WW2 Greyscale images Hurric10



    _________________
    Interpreting colour from WW2 Greyscale images Images10
    Bench: Bv 141 B, Ju 87 G-2, Macchi C.205, Arado Ar.234
    Stash: Ju87D-3, Bf 109 E-3, Bf109 F-4/trop, Bf 109 G-10, He219....

    www.ScaleModelBench.com
    Wayne
    Wayne
    Gold
    Gold


    Posts : 1065
    Join date : 2011-01-11
    Age : 45
    Location : Smack in the middle of the Med

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  Wayne Wed Apr 18, 2012 2:09 pm

    He 162:

    This turned out real good, apart from the blemish in the arrow.

    Interpreting colour from WW2 Greyscale images He16210

    Interpreting colour from WW2 Greyscale images He_16210


    _________________
    Interpreting colour from WW2 Greyscale images Images10
    Bench: Bv 141 B, Ju 87 G-2, Macchi C.205, Arado Ar.234
    Stash: Ju87D-3, Bf 109 E-3, Bf109 F-4/trop, Bf 109 G-10, He219....

    www.ScaleModelBench.com
    Wayne
    Wayne
    Gold
    Gold


    Posts : 1065
    Join date : 2011-01-11
    Age : 45
    Location : Smack in the middle of the Med

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  Wayne Wed Apr 18, 2012 2:11 pm

    Spitfire.

    Not sure about the colour scheme but apart from that the result is not bad.

    Interpreting colour from WW2 Greyscale images 4_fs10

    Interpreting colour from WW2 Greyscale images Spit10


    _________________
    Interpreting colour from WW2 Greyscale images Images10
    Bench: Bv 141 B, Ju 87 G-2, Macchi C.205, Arado Ar.234
    Stash: Ju87D-3, Bf 109 E-3, Bf109 F-4/trop, Bf 109 G-10, He219....

    www.ScaleModelBench.com
    Ray
    Ray
    Best in Show
    Best in Show


    Posts : 6102
    Join date : 2009-07-21
    Age : 61
    Location : Zurrieq MALTA

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  Ray Wed Apr 18, 2012 2:38 pm

    Dak it-ticlis mar-roundel x'inhu Wayne pale Question

    Cappast id-decal qabel jaqaw pale Question

    Kuwl Cool Twisted Evil
    bcauchi
    bcauchi
    Best in Show
    Best in Show


    Posts : 4088
    Join date : 2009-07-30
    Age : 63
    Location : St. Julian's

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  bcauchi Wed Apr 18, 2012 8:07 pm

    I'm no expert Wayne but those photos sure look good, i think that you have achieved your goal. How about trying out some malta photos. That would be really interesting to see what happens.Good luck for your thesis.
    skyhigh
    skyhigh
    Best in Show
    Best in Show


    Posts : 4654
    Join date : 2009-07-30
    Age : 63
    Location : Qormi, Malta

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  skyhigh Wed Apr 18, 2012 10:21 pm

    Good luck Wayne.... cheers
    Paul Salomone
    Paul Salomone
    Gold
    Gold


    Posts : 655
    Join date : 2011-07-08
    Age : 59
    Location : MANIKATA MALTA

    Interpreting colour from WW2 Greyscale images Empty Interpreting colour from WW2 Greyscale images

    Post  Paul Salomone Thu Apr 19, 2012 7:32 am

    Good job Wayne,

    Prosit habib.

    cheers cheers cheers
    David
    David
    Silver
    Silver


    Posts : 421
    Join date : 2009-07-22
    Age : 62

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  David Thu Apr 19, 2012 8:45 am

    Proset Wayne

    D
    Wayne
    Wayne
    Gold
    Gold


    Posts : 1065
    Join date : 2011-01-11
    Age : 45
    Location : Smack in the middle of the Med

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  Wayne Mon Apr 23, 2012 10:59 pm

    That's it. It's done. Project Reports have been bound and CD's have been burnt. All that's left is submitting everything for review.

    It's been a challenge but it's also been fun. Thank you all for your encouragement.

    Now bring on the modelling!!! cheers cheers


    _________________
    Interpreting colour from WW2 Greyscale images Images10
    Bench: Bv 141 B, Ju 87 G-2, Macchi C.205, Arado Ar.234
    Stash: Ju87D-3, Bf 109 E-3, Bf109 F-4/trop, Bf 109 G-10, He219....

    www.ScaleModelBench.com
    Wayne
    Wayne
    Gold
    Gold


    Posts : 1065
    Join date : 2011-01-11
    Age : 45
    Location : Smack in the middle of the Med

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  Wayne Mon Apr 23, 2012 11:02 pm

    bcauchi wrote:I'm no expert Wayne but those photos sure look good, i think that you have achieved your goal. How about trying out some malta photos. That would be really interesting to see what happens.Good luck for your thesis.

    I've tried it on a couple of Malta photos, but with not much luck. The problem is that most photos from Malta are really bad quality so the end result is patchy to say the least. If anyone has a decent quality photograph, I'll be more than happy to try it out and see what comes out.


    _________________
    Interpreting colour from WW2 Greyscale images Images10
    Bench: Bv 141 B, Ju 87 G-2, Macchi C.205, Arado Ar.234
    Stash: Ju87D-3, Bf 109 E-3, Bf109 F-4/trop, Bf 109 G-10, He219....

    www.ScaleModelBench.com
    Ray
    Ray
    Best in Show
    Best in Show


    Posts : 6102
    Join date : 2009-07-21
    Age : 61
    Location : Zurrieq MALTA

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  Ray Tue Apr 24, 2012 3:33 pm

    Wayne wrote:
    bcauchi wrote:I'm no expert Wayne but those photos sure look good, i think that you have achieved your goal. How about trying out some malta photos. That would be really interesting to see what happens.Good luck for your thesis.

    I've tried it on a couple of Malta photos, but with not much luck. The problem is that most photos from Malta are really bad quality so the end result is patchy to say the least. If anyone has a decent quality photograph, I'll be more than happy to try it out and see what comes out.

    Wayne how about picking up a couple of Marco's Jurassic Models, make them B&W & try this one on them lol! Question
    bcauchi
    bcauchi
    Best in Show
    Best in Show


    Posts : 4088
    Join date : 2009-07-30
    Age : 63
    Location : St. Julian's

    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  bcauchi Wed Apr 25, 2012 7:53 am

    Wayne i have lots of Malta photos and some are crystal clear, i will send yousome to try out. Will start with the obvious schemes and maybe move on to something a bit more intriguing

    Sponsored content


    Interpreting colour from WW2 Greyscale images Empty Re: Interpreting colour from WW2 Greyscale images

    Post  Sponsored content


      Current date/time is Fri Nov 08, 2024 9:37 pm