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Compare, Match, Analyse - Chromamate Free Colour Matching Software

 
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Author Previous TopicReplies: 7 / Views: 1,170Next Topic  
Valued Member
Canada
437 Posts
Posted 12/02/2025   9:59 pm  Show Profile Check clivel's eBay Listings Bookmark this topic Add clivel to your friends list Get a Link to this Message
Please feel free to download the pre-release version of ChromaMate here: https://www.thestampweb.com/ChromaMate
It is available for Windows, Mac, and Linux, and, of course, it's free.

ChromaMate aims to address some of the issues collectors face when identifying colours: monitors and scanner sensors differ, different catalogues use different colour standards, and colours are not even consistent across different postal authorities from the same publisher.

Although ChromaMate hasn't addressed all these issues, I hope it has addressed enough to be useful.
ChromaMate utilises the CIEDE2000 algorithm, which has been specifically designed to model the human eye for accurate colour comparison. Matching is performed between the stored image, regardless of how the image is displayed on the screen, and a colour library, thereby removing the screen from the equation.

When first installed, ChromaMate includes a library containing the standard web colours for getting started. Unfortunately, due to copyright issues, I am unable to include an actual scanned colour key from SG or Scott. Also, to minimise the scanner's effect, the library should ideally be created from images scanned on the same scanner as the images to be matched.

One does not have to scan a whole colour key to get started. For example, I collect 1/2d green Rhodesian doubleheads, which are listed with multiple shades of green. I have identified the different shades, scanned these and added them to my "doublehead" library. Now, when I want to identify a 1/2d green doublehead, I can simply match it against this library and choose the closest match.

The pre-release version is mostly complete and should be bug-free. The most significant omission is a lack of documentation.
However, I have put together a short (short is, of course, all relative) video tutorial introducing ChromaMate, illustrating how to match stamp colours against a custom colour library.

BeYicMoo6Vg



Unfortunately, my video production skills leave much to be desired, so please bear with me.


If anyone does install the pre-release version and encounters any bugs or has suggestions for improving the program, I would appreciate it if you could get in touch with me.


Clive


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AlbumEasy - Free software for creating custom stamp album pages
ChromaMate - Compare, match, analyse, free colour matching software
ImageSleuth - Images, hidden inside images, revealed. A retroReveal alternative
PSGSA - The Philatelic Society for Greater Southern Africa
Edited by clivel - 12/02/2025 9:59 pm

Valued Member
United States
209 Posts
Posted 12/03/2025   2:41 pm  Show Profile Bookmark this reply Add Bobcat126 to your friends list  Get a Link to this Reply
wow clivel.... outstanding job! I really need to get a good scanner first before moving forward...I'm looking forward to seeing others responses and experiences on this.
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Edited by Bobcat126 - 12/03/2025 2:41 pm
Valued Member
Canada
437 Posts
Posted 12/05/2025   5:32 pm  Show Profile Check clivel's eBay Listings Bookmark this reply Add clivel to your friends list  Get a Link to this Reply

Thanks Bobcat126

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AlbumEasy - Free software for creating custom stamp album pages
ChromaMate - Compare, match, analyse, free colour matching software
ImageSleuth - Images, hidden inside images, revealed. A retroReveal alternative
PSGSA - The Philatelic Society for Greater Southern Africa
Valued Member
Learn More...
United Kingdom
197 Posts
Posted 01/31/2026   2:24 pm  Show Profile Bookmark this reply Add pjr to your friends list  Get a Link to this Reply
The idea is admirable, but I've read licence.txt and I'm wondering why isn't it open source? I'd be interested to know why you made that choice.
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Valued Member
Canada
437 Posts
Posted 02/02/2026   8:02 pm  Show Profile Check clivel's eBay Listings Bookmark this reply Add clivel to your friends list  Get a Link to this Reply

Quote:
The idea is admirable, but I've read licence.txt and I'm wondering why isn't it open source? I'd be interested to know why you made that choice.

To date, I have released three free software applications to the philatelic community: AlbumEasy (open source), followed by ImageSleuth and ChromaMate (both closed source).

As a developer, my expectations for releasing AlbumEasy as open source were twofold. I had hoped to attract contributions to the code from other developers, and, as I make my living from hardware and software contracting, I had also hoped to attract paid work.  Regretably, not only were my expectations not met, but there was also a considerable downside for me.

In the 12 years since I first released AlbumEasy as open source, I have received only ONE contribution to the code. Yet I have wasted countless hours with potential contributors. Walking them through setting up a development environment, guiding them through sections of the code, and having protracted back-and-forth discussions of how a feature should be implemented.
And then, only for them to lose interest and simply disappear into the ether, or, as has happened on a number of occasions, present me with a chunk of undocumented code that: "sort of works, there are still a few bugs, but I'm sure that you can sort it out".

But what I find especially galling, and to be fair, this applies to all of my free software, not just open source, is the sense of entitlement many users seem to have.
I do offer free support. When contacted with a query, I always respond, often on the same day. Yet, many times, my response is not even acknowledged, let alone a thank you.

But even worse are the complaints, some of which are quite objectionable; emails along the lines of "You should be ashamed of yourself for releasing such rubbish. I wasted 30 minutes of my valuable time trying to get your junk software to work" needless to say I haven't included the choice words not appropriate for a family friendly forum, which often accompany these missives. Unfortunately, far too many people seem to lose all inhibition hidden behind the anonymity of a generic email address.

There is also, of course, a financial aspect. For various reasons, although I am well past retirement age, I find myself in the unfortunate situation of still needing to earn an income, while at the same time I have invested thousands of hours in developing free software.
As closed source, my free software remains an asset that could potentially have tangible value; as open source, it is valueless.
With software that has value, while highly improbable, it is not beyond the realms of possibility that a catalogue publisher, or even one of the larger auction houses, might one day choose to diversify into software and purchase my small portfolio of philatelic applications - we can all dream

So now that I've given you the reasons I haven't released it as open source, I would be interested to know whether you still think I should, and, if so, why?
Clive

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AlbumEasy - Free software for creating custom stamp album pages
ChromaMate - Compare, match, analyse, free colour matching software
ImageSleuth - Images, hidden inside images, revealed. A retroReveal alternative
PSGSA - The Philatelic Society for Greater Southern Africa
Edited by clivel - 02/02/2026 9:32 pm
Valued Member
Philippines
305 Posts
Posted 02/21/2026   08:41 am  Show Profile Bookmark this reply Add rainrainbow to your friends list  Get a Link to this Reply
@Clivel: Just want to thank you for ImageSleuth.

A great tool that I use regularly.

Sorry to read about your frustration with the public in general. Reading your message makes me appreciate your efforts all the more.

We should proceed with more thought about how these tools come to us at no cost.

Really, thank you.

RRB
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Pillar Of The Community
United States
624 Posts
Posted 02/22/2026   9:50 pm  Show Profile Bookmark this reply Add Andyrich74 to your friends list  Get a Link to this Reply
Very good explanation Clive. I remember in the good old days when people talked smack they had to do it to your face and look you in the eye. Didn't happen as much when there was a potential consequence.

I'll check this out, and hope you are able to monetize it in some way shape or form. Have you reached out to anyone about some sort of licensing deal or something?

Nonetheless, appreciate your efforts; thank you.
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Valued Member
Canada
437 Posts
Posted 02/24/2026   12:28 pm  Show Profile Check clivel's eBay Listings Bookmark this reply Add clivel to your friends list  Get a Link to this Reply

@rainrainbow and @Andyrich74

Thank you very much for your kind words. I truly appreciate your comments

I haven't actively tried to monetise my software, nor am I planning to, but it is nice to know that I have the possibility sometime in the future.

Clive

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AlbumEasy - Free software for creating custom stamp album pages
ChromaMate - Compare, match, analyse, free colour matching software
ImageSleuth - Images, hidden inside images, revealed. A retroReveal alternative
PSGSA - The Philatelic Society for Greater Southern Africa
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