Convert to grayscale.

But I have no clue as to what you’re talking about.

Right, well, one more time expaned and enlarged -:)

Anybody in development you talk to, anytime and anywhere you talk to development, the first point that is positioned is that colour management is no more and no less than colour management.

If you have a bad exposure, well, you have a bad exposure. Colour management does not correct your bad exposure, it simply maintains the colours by morphing the colourants.

ICC colour management is based on seven categories of the ICC file format divided into two classes, the device class and the non-device class.

1. The device class is SCNR Scanner (for scanners and cameras), MNTR Monitor, and PRTR Printer.

2. The non-device class is SPAC Colour Space, ABST Abstract, NMCL Named Colour, and LINK Device Link.

The ICC architecture is based on the concept that the manner in which the colours are managed and the colourants are morphed is determined when the ICC profile is built.

The concept is that you configure, calibrate and characterise the devices over which you have control, and publish your characterisations (ICC profiles) in one of two ways.

Either you embed the characterisations into objects (e.g. TIFF, JPEG) or objects that are themselves embedded in page descriptions, or you publish the characterisations as files for others to use.

For instance, if you define a level of gray in a linearised RGB space such as Generic RGB Profile, you can soft-proof how that gray appears using the characterisation/profile for the printing condition.

Throughout, you are not changing the colourants in your object. Rather, those colourants are inviolate and intact since the conversion for the ColourWorld is in memory only.

Now, if you do need to change the colourants in order to correct your exposure, then your characterised display let's you do that in true colour.

Your object will have colourants whose colours are defined by the source ICC profile in the object, and the system will construct a ColourWorld for you to see those colours on your display.

If you open an image in Apple Preview or in Apple Pages, you can correct the exposure because the system honours the embedded profile or assigns a profile which you can change if you want.

Your colour correction controls are relative to the source ICC profile (not, of course, to your destination display profile).

When you save your colour correction, whether in Preview or Pages, you have changed your colourants relative to embedded ICC characterisation/profile for that object.

Now, a lot of people can follow this without bending over backwards, and I'm sure you can if you try. Object-oriented ICC imaging, object-oriented Unicode imaging, page markup models such as HTMl and page description models such as PDF have not the slightest to do with physical paper, so you have a choice between getting with the program or going back to physical paper. I'm sorry, but that is the reality, stark as it seems.

/hh

What did you think of Top Gear's take on Saab users?

Walter lives in the US where they don't watch BBC Top Gear.

And what's with SAAB Svenska Andels Aktiebolaget anyway?

Personally, I've driven a series of Citroën 2CV's and before that the family drove the larger elevatable models which were the only cars that could cope with the roads in Kenya in the 60ties. Not that this has the slightest to do with colour management and colour correction for grayscale -:).

/hh

Firstly thank you for being relatively comprehendible on the previous post.

Secondly Top Gear is broadcast on BBC World Wide and as such is probably on the cable networks in the USA.

Top Gear USA was canned by NBC due to concerns about the British presenters speaking as freely as they do being incompatible with American practice, which is to censor any criticism of America or American corporations.

Much like this forum really. A thread on Apple's poor support of Arabic and thus minute representation in the Arabic speaking world was deleted yesterday without even the usual finger waving email. MacWorld has a similar policy of tight censorship.

We'll see what happens to this comment, because above all you are not to mention the censorship. That is the No 1 forbidden topic.

That is all interesting and relevant information. However, it is not useful, as it does not tell Lenny how to apply it.

In this thread, I think the best reply was Yvan's first one. Most of the rest seem of little practical use to Lenny, no matter how correct they are.

Personally I enjoyed reading all the entries though, so thanks to all who posted!

However, it is not useful, as it does not tell Lenny how to apply it.

In general, it is important for the user to understand the intention of an imaging model, and where in the interface the aspects of the imaging model are accessed.

There are two levels of user on a list such as this, the occasional user asking and the regular user responding. In spending time, there is a choice between training the occasional user and training at the regular user. The time is better spent in training the regular user on the principle of training the trainer. The trainer may not appreciate being trained, but if it is not done then the trainer becomes a source of technical misinformation and the usefullness of lists is reduced as a consequence.

Now let's put this to bed.

/hh

Firstly thank you for being relatively comprehendible on the previous post.

You're always welcome, whenever I have the time to try.

We'll see what happens to this comment, because above all you are not to mention the censorship. That is the No 1 forbidden topic.

Always, always, always challenge the censorship. There are people here who publically enforce the censorship and there are people here who challenge the censorship. But as always, it's the facts that count. Anybody, anywhere, anytime can test that products claimed to be operational are in fact not operational. It's just a matter of pointing out in public that the Emperor has a bare but -:).

/hh

PeterBreis0807 wrote:
A thread on Apple's poor support of Arabic and thus minute representation in the Arabic speaking world was deleted yesterday without even the usual finger waving email.

Strange. I managed to read it before it was deleted, and it struck me as very polite and well written. It was of course off topic, as we are not supposed to discuss future versions here, but most of us do occasionally without any deletions.

Could it be because the poster only talked about Arabic without mentioning the hundreds of millions of Farsi, Hebrew and Urdu speakers, who cannot use Pages either?

This works for any app.

Print>Open PDF in Preview (bottom left).

In Preview.app Save As (PDF), and use the Quart filters, select Gray Tone.

From there you can save as other format if you want...

This works for any app.
Print>Open PDF in Preview (bottom left).
In Preview.app Save As (PDF), and use the Quart filters, select Gray Tone.

Ehrm ... that is the general gist of the above.

/hh

True, Yvan, but playing with the Brightness, Contrast, Exposure and Levels controls will provide some (sometimes) needed improvements to the picture.

Walt

Yvan'

Bravo!

Walt

Thanks.

I was not sure that my wording was perfect but it seems that you understood what I wanted to say.

Yvan KOENIG (from FRANCE jeudi 23 avril 2009 19:05:35)

Walt,

Henrik is Henrik.

Peter

Peter,

Agreed.

Walt

Henric,

Thank you for your concise explanation of Top Gear. I had never heard of it.

Walt