Using Photoshop to Colourise |
Using Photoshop to Colourise |
Mar 22 2014, 09:52 PM
Post
#1
|
|
Member Group: Members Posts: 334 Joined: 11-December 12 From: The home of Corby Crater (Corby-England) Member No.: 6783 |
I for one look in wonderment at the work of Damia and others. Being a curious soul I also want to know how they do it and also have a go at colourising myself.
I have searched through Google trying to find tutorials on colourising but the results tend to be in the realms of changing red cars into green cars etc. I have also searched for colour mapping, gradient mapping...the list goes on! I have come to the conclusion that I don't know what I am talking about and therefore don't know what question to ask. Could someone please point me in the direction of a good resource on colourising greyscale images using colours from another 'reference image'. (Is that the right question?) I have Photoshop cs4, cs4 extended, cs5.1 and cs6. All this software and no knowledge.....it's getting embarressing!! |
|
|
Mar 22 2014, 10:13 PM
Post
#2
|
|
Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
Splitting a color image in hue/saturation/value channels, then combining the grey-scale image as value channel with the hue and saturation channel of the color image could be a starting point.
The image geometries should match. |
|
|
Mar 22 2014, 10:20 PM
Post
#3
|
|
Member Group: Members Posts: 334 Joined: 11-December 12 From: The home of Corby Crater (Corby-England) Member No.: 6783 |
Splitting a color image in hue/saturation/value channels, then combining the grey-scale image as value channel with the hue and saturation channel of the color image could be a starting point. The image geometries should match. Gerald, Thank you for your reply, I recognise the words but the meaning evades me, as I said, I am a curious soul so I will now investigate a lot of drop down menus, and docked wotsits. Thanks again. |
|
|
Mar 22 2014, 10:47 PM
Post
#4
|
|
Member Group: Members Posts: 334 Joined: 11-December 12 From: The home of Corby Crater (Corby-England) Member No.: 6783 |
Ok, I've had a play and a bit of Googling HSV (HSB?).
Swapping the greyscale for the value channel makes sense, however, how would I display an image in HSV (HSB?) mode. I went down the usual Image..Mode.. route but no HSV option. Sorry to come across as being a bit thick but I use Photoshop to wonderfully enhance my (not so wonderful) photographs, and this is not a route I would normally take. |
|
|
Mar 22 2014, 10:52 PM
Post
#5
|
|
Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
Here are two quicky methods for dropping color from one image into another
One method is: Align the two images as best you can Put each image in a separate layer with the color image on top Reduce the opacity of the color image to something very low, like 20% Merge or flatten the layers Increase the color saturation to a comfortable level Adjust image levels/saturation/color-balance until the image looks good to you. Another method: Align the two images as best you can and place them in separate files Copy the black and white image Change the MODE of the color image to CMYK Select "channels" under the "Window" drop down menu In the "channels" box click on the "black" layer Paste the copied black and white image into the "black" layer. Select the CMYK layer Adjust image levels/saturation/color balance until the image looks good to you. Change the MODE back to RGB -------------------- If Occam had heard my theory, things would be very different now.
|
|
|
Mar 23 2014, 02:59 AM
Post
#6
|
|
Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
One of my favorite image processing tricks: colorizing images
(I was curious, so I checked to see if Google was smart enough to return results featuring "colorizing" for a search on "colourise" -- it was but the search results are still quite different than for a search on "colorizing ) -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
|
|
|
Mar 23 2014, 03:43 PM
Post
#7
|
|
Member Group: Members Posts: 334 Joined: 11-December 12 From: The home of Corby Crater (Corby-England) Member No.: 6783 |
Thanks all for the tips/links.
I'm going to have Sunday dinner and then have a good root around. I will let you know how I got on and maybe even post an attempt of two for an expert critique (be gentle!). |
|
|
Mar 23 2014, 09:35 PM
Post
#8
|
|
Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
it really depends on what is being colorized
combining a set of 3 Red, Green, Blue images into a color image ( this has been done scene the mid 1800's ) for example this photo gallery from 1909 Czarest Russia http://www.wired.com/rawfile/2014/03/proku...-photos-russia/ where a black and white images using a 1) red filter 2) green filter 3) blue filter are combined into a single RGB image from a different post about the MSL 0229ML0010620000106079E01_DRCL.IMG that is a rgb image but i can break it up for an example -----red ------ green ---- blue this is for Gimp 2.8.10 open all three red,green.and blue images from the red click on Color / Components / Compose set the red layer as the red image set the green layer as the green image set the blue layer as the blue image and you get this The other type is ... converting a black and white image that has NO!!!! color data for example this fractal noise made Planet DEM and colorizing it to this this is more an ART FORM than a step by step There is for a now gone tutorial ,still on the internet archive http://web.archive.org/web/20130625110058/...=21&t=16089 |
|
|
Mar 24 2014, 08:01 PM
Post
#9
|
|
Member Group: Members Posts: 334 Joined: 11-December 12 From: The home of Corby Crater (Corby-England) Member No.: 6783 |
JohnVV,
As you point out, combining three greyscale filter images has been around since Noah was a boy, I am familiar with this type of manipulation. The second example is closer to the mark. The way that I thought it all worked was to create a comprehensive colour gradient from a 'representative' colour image of a martian landscape and then map that to the 255 greyscale levels for any subsequent greyscale image of choice. Obviously each resulting image would need tweaking, and the original colour gradient could be updated from other more 'representative' martian colour images. This is how it works in my head, which is another universe entirely |
|
|
Mar 25 2014, 09:21 PM
Post
#10
|
|
Member Group: Members Posts: 334 Joined: 11-December 12 From: The home of Corby Crater (Corby-England) Member No.: 6783 |
The problem being I don't know how to do either.
|
|
|
Mar 25 2014, 10:25 PM
Post
#11
|
|
Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
the first example is a simple one
all 3 layers ARE from the SAME image the photo gallery from 1909 used three photographic slides combined to make one image A more complex one would be Bjorn's post http://www.unmannedspaceflight.com/index.php?showtopic=7671 in synthetically making a red layer and a green and a blue then alining up all three in the"fractal noise" and "blue mars" examples above that started with using a color image and making a custom "gradient" to use to add color Gimp has a nice built in plugin to do this ( Photoshop ??? i do not use Microsoft software so i do not use photoshop ) and Gimp is GPL'ed the "noise" one is a merger of 4 or 5 or 6 different images different gradients and hand painting and working with many many many layers in the image ( and this was only a VERY quickly done image for a old post ) on the B&W image click on Color / Map / Sample colorize image layers are like a stack of slides you stack them on top of each other i will have to post links to tutorials but they are going to be for DIFFERENT things that all can be combined to do something else unfortunately there really are no "step by step" general guides to fallow yes , but no real step1 step2 step3 different tutorials all doing something a bit different the SAME theory applies to the very expensive Photoshop as to gimp an example of using LAYERS , and a LOT of them http://tutorialgeek.blogspot.com/2012/11/u...hotos-from.html a basic one on the gimp web site http://www.gimp.org/tutorials/Selective_Color/ painting http://www.digitalphotoguide.net/post-prod...ite-photo-gimp/ the "sample colorize " plugin http://docs.gimp.org/en/plug-in-sample-colorize.html some youtube videos https://www.youtube.com/results?search_quer...0white&sm=1 i learned using watercolor and paint brushes on B&W "rag" prints -- photographic PAPER digital is WAY EASIER !!!!! reddit ???? but an example of what can be done http://www.reddit.com/r/Colorization |
|
|
Mar 26 2014, 03:56 PM
Post
#12
|
|
Member Group: Members Posts: 334 Joined: 11-December 12 From: The home of Corby Crater (Corby-England) Member No.: 6783 |
An impressive response from an obviously passionate expert. Thank you.
|
|
|
Mar 27 2014, 04:53 AM
Post
#13
|
|
Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
QUOTE from an obviously passionate expert. Thank you. about two years back i "tried" and failed to teach someone that DID NOT want to do any work and learn something all that person wanted was step1 step2 and so on as a result i kept failing that persons software ad-ons do to very poor quality ( they were not passing a basic quality control screening ) if someone dose NOT want to put in the time to learn a new skill then ............. |
|
|
Mar 27 2014, 09:41 PM
Post
#14
|
|
Member Group: Members Posts: 334 Joined: 11-December 12 From: The home of Corby Crater (Corby-England) Member No.: 6783 |
The colourising of an old black and white image to make it look as though it were a colour image is an artistic labour of love.
I am not a lover of labour, neither am I an artist. My eldest twin daughter however, is a bit of a budding artist, so I will show her this thread, I think she will love it.(It might even get her away from social media for a while!) A step by step tutorial is an abhorrant idea, a general methodology which I can adapt is what is required, I think I need to go down the custom gradient route.? Thanks again for all comments. |
|
|
Lo-Fi Version | Time is now: 21st May 2024 - 02:13 PM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |