Printer Profiles

[老总]

有没有人去costco印照片用他们的Printer Profiles的？
为什么我从www.drycreekphoto.com 下载的Printer Profiles是 .icc 的，window 好像只认 .icm 的。
哪位解释下。。。

[老总]

谢谢老周和500，现在搞定了。
有一点不清楚的是，拿出去印，是不是不用管custom proof的设定，只要 convert to profile 去打印机的 profile后，save就可以了？ 我的理解是custom proof只是在家打印时才用设？

[老总]

作者: 500miles

不是的，就是拿出去打印才要设置custom proof，然后convert to profile，再存盘。还有有的lab有两台打印机，要看好你用...

我已经试过了，不用设custom proof，照样可以convert to profile，当你save to jpeg时，你会看到icc已经转到了新的profile。这样，就可以拿出去印了。
我觉得设custom proof是可以让你用soft proof功能来比较新旧profile的区别，设了custom proof，就可以看到打印出来的效果了（这里，老周贴的那段“26. SOFT PROOFING AND OUT-OF-GAMUT COLOR”就可以用上了）。 所以，这个功能是在view底下的。

当你把printer得profile在custom proof下设好后，用print的功能（本地打印机），你就可以在原来的和printer的profile中选一个来打印，而不需要convert了。

[老总]

作者: -GoGoGo-

去COSTCO冲印的时候, 记得在信封上写一句PLEASE NO AUTO CORRECTION, 给信封的时候也和店员提一句, 不然COSTCO的电脑默认昮..

作者: 500miles

我是在密市的costco洗，觉得不错，而且店员态度也好，ellesmere那个感觉就不好，而且觉得他们太忙肯定不会及时换...

两位有没有试过，在网上付印呢？ 网上也有一个是不是要AUTO CORRECTION的选项，默认倒是No AUTO CORRECTION.

[老总]

作者: 老周

这两天很忙，书也是前两天上班的时候偷偷看的，机器上也没有PS，所以只有格大概印象，很多东西还没有仔细看㮮.

Nikon Capture NX 也有个类似的 convert to profile 的功能，应该是和PS的道理是一样的。
他是这样说的：
Convert to Profile
The Convert to Profile option enables you to convert the profile space of the current image to the profile space of the output device. The result is that the actual color values change, but the appearance of those colors does not change on your monitor. This is due to the fact that you have simply changed the values to ensure that the output device will produce the same colors that you see within the limitations of that output device.

The Convert profile function results are the same as when you use the color management option within the Print feature. Since an image may be printed on different printers, or in different situations on the same printer, it is often recommended that you do the profile conversion at the point of printing. Using the Convert Profile feature is normally recommended only if you intend to have the image printed elsewhere, and only when that service has provided you with their output device’s color profile.

[老总]

我觉得work flow应该是这样的：
1。把片子的调到满意，把原片存档。
2。用proof setup 加入printer profile后，check "proof color", 和 “Gamut Warning”，用ctrl+y, 来看打印的色彩是否满意，很多时候打印机打不出一些高饱和的色彩，所以，在电脑上看来很满意的，印出来就会觉得色彩很dull.
3. 继续调片子，参考老周贴的那段“26. SOFT PROOFING AND OUT-OF-GAMUT COLOR”
4. 把片子的调到满意后，用convert to profile生成打印的copy 去打印。

[老总]

作者: 500miles

spider不能做打印机校正，还需要一个叫printfix的硬件，就是一个校正过的小scanner

spider pro 又带一个printfix的software, 专门是为在家打印的用户调打印机的。

[老总]

作者: 老周

老总，

我的理解与你的差不多。

按照老约翰的理论，原片扫描好（或者数码文件从RAW转出来）以后，除非水宮.

在家打印的话就不需要。
拿出去的话，
1。你用它的Profile调好，要求他不要动你的片子( 只有convert, 才能从你的color profile 转到打印的color profile)
2. 你不调，让店里为你自动调。

[老总]

作者: 500miles

用这个软件调就跟用adobe gamma一样，聊胜于无。真正准确校正还是要printfix的硬件

你太高级了 尼LD批吗?

[老总]

作者: moccafirst

越看越晕，留个爪印~~~

我到现在也只搞懂一部分
基本上是拍了只在电脑上看，就不用去管他。

[老总]

作者: william06

恩, 家里搞个小的4x6照片打印机, 很方便实用. Epson的那个on sale才40刀, 色彩什么的都不错

买染料的时候，你就知道痛了

[老总]

作者: william06

趁on sale的时候多买几个...

那还是贵阿，关键是除了你天天打，不然染料一干，又歇了菜了不是？

[老总]

作者: william06

每个月至少打一次, 还行

你有啊？ 我觉得肯定比 0.18/张要贵。

[老总]

作者: 老周

色彩空间的问题，真是不断的困扰着我，昨天又一头扎进扫描仪的校色问题里去了。

简直就是＂痛经＂！

Example work flow
If you have not already installed the profile(s) on your system, you need to do so before proceeding.
1。Open the image in Photoshop.
2。Assign your scanner or camera profile to the image (Image→Mode→Assign Profile). We've now told Photoshop how to interpret the image colors. If you do not have a profile for your input device, use the closest suitable working space (usually Adobe RGB or sRGB).
3。Convert the image to a suitable editing color space. If you don't have other preferences, Adobe RGB is a reasonable choice. You do not want to edit the image in the device color space — it describes how your camera or scanner sees the world, which does not translate into a well behaved editing space.
Note: If you do not have a scanner or camera profile, simply ignore the first three steps.

4。Edit until you are happy. Save the file.
5。Make a duplicate of the image. The original should be saved as a master copy, suitable for printing on any printer. We'll now work on the duplicate, and tune it to optimize the colors you get on your printer.
6. Now it is time to soft proof to see how the print will look. Choose the duplicate image, and select View→Proof Setup→Custom.
7。Select the profile to use from the drop-down list in the Proof Setup dialog box.
8. Check the Preview box and turn on Black Point Compensation to accurately scale the black level in your image to the printer's black.
9. Do not select Preserve Color Numbers. This shows how your image would look if you did not do a color space conversion — just the opposite of what you want.
10. Experiment with rendering intent. You can quickly switch between rendering intents in the Soft Proof dialog - just have the Preview option checked. Relative Colorimetric often gives the best results. Perceptual or Saturation can be better if your image contains many out-of-gamut colors. Absolute Colorimetric rendering is often used for mid-stage print proofing; if you are familiar with this, you don't need this document.

11. Simulation options:
。。。。。

12. If you do not see significant changes when soft proofing, this is OK. This means your image contains colors that mainly lie within the printer's gamut. If the images do not match well enough, the following steps can help.
13. Set the highlight and shadow points in the Levels dialog box. In Photoshop, hold down Alt/Option while adjusting the level sliders. This will show any shadow or highlight clipping that occurs. The ideal setting is usually the point right before clipping occurs.

14. Any color casts or lack of saturation can usually be fixed by minor curves tweaks. See the references for links to editing techniques.
If you can't seem to get one or more colors right, the problem may be that your monitor is not capable of displaying the colors correctly. To check for this, soft proof using your monitor profile, and turn on the gamut warning (View→Gamut Warning). This is a useful technique in other cases, and is a good check when your prints do not match your monitor.

15. If you are not familiar with how your printer responds, or do not trust the profile, it is a good idea to check for out-of-gamut colors (View→Gamut Warning). Using a selected color range, you can (in order of preference) reduce the lightness, tweak the hue, or very slightly reduce the saturation to bring the problem colors within gamut. Note that all your edits are being performed in the file's editing color space rather than in the printer color space. This makes edits more predictable and controllable.
16. At this point, you may want to convert the image to the output color profile (Edit→Convert to Profile for Photoshop CS2 or Image→Mode→Convert to Profile for previous versions). This is particularly true if you are sending the image to be printed on a device such as a Fuji Frontier or other digital lab printer. These machines do not read embedded profiles, so without the conversion, all your hard work will be wasted.
17. Our preference is to archive both versions of the image — the original and the converted and profiled duplicate. To print the image on a different printer, start with the original rather than performing endless series of profile conversions that will slowly degrade the image.


Printing with ICC Profiles:
If you are printing directly from Photoshop, you want to ensure that your printer is set up exactly as it was when you printed the profiling target. In most cases, this means turning off all printer color management and automatic image enhancements. You are letting the profile and Photoshop's conversion do the color work rather than relying on some image-dependent algorithm.
If you are using a CMYK printer, the details of CMYK separations are beyond the scope of this brief list. In most cases, this is not terribly difficult — get a good reference book.
It is essential to avoid applying the profile twice. This typically happens when printing to desktop printers with drivers that are all too happy to try their hand at color management. Use the Print With Preview dialog in Photoshop 7.0 and later to gain access to all the color options. Be sure to check the "More Options" button to see the color settings. (These are available in the Print dialog in Photoshop 6.)
Detailed print settings for Photoshop CS2.
Print settings for Photoshop version 6 through CS.
If you are sending the image out to be printed, either talk with the print operator first or give written instructions. You usually want to provide a file that has been converted to the printer profile. Tell the operator not to monkey with your image or apply any automatic enhancements. For more Fuji Frontier and Noritsu specific information, refer to our profile usage instructions.


完整版，看这里：

http://www.drycreekphoto.com/Learn/profiles.htm

[老总]

作者: -GoGoGo-

至于这么一分两分钱的算帐吗? 请参考旧贴:

狗狗搞错人了笆。。。

[老总]

作者: -GoGoGo-

还油什么墨啊, 堂堂的DSLR, 牛机牛人, 配个彩色激打正正好

看来这狗狗是气有DSLR的，谁有，他就跟谁急。

[老总]

作者: william06

原来是这样, 那么大家一定要鼓励gogo的夫人送个DSLR给GOGO

不够不够，gogo有了DSLR, 还要跟有5D，有F1.0， 有35G卡， 用RAW， 有10000转硬盘， 有双核CPU，有4G内存，有校正色彩的显示器......... 的急 ！

[老总]

看来痛经的人还有老Z, 威廉好像不怎么痛。

[老总]

我同意老Z的看法，基本上原件应该用RGB98来处理和保存，尽管目前大部分monitor在sRGB.
外出打印前，我会用soft proofing看一下，但我想大部分情况下我不会去调gamma warning的，1 是太麻烦，2是把色彩比例调顺了，图的细节也会丢失不少（见老Z pic.3 和 pic.2的比较，我自己也试过，结果和老Z的相似)。
我是倾向于convert to打印机的icc的，现在costco网上的default就是不让他再处理的。好处是，如果对方不犯错，至少出的图是和monitor上一致的。
如果，不convert to打印机的icc的话，原理上他处理也是用同一个icc, 可问题是他打开的时候，不清楚他是如何处理我原来profile的，这样，结果也就不明确了。
外面目前的打印机的color space 都比sRGB要小，尤其是在比较高的 Luminance的时候蓝绿色损失的比较大，结论是自己上好的inkjet打印机(至少要比外面的好）。

[老总]

作者: 500miles

photolab还是大幅打印机？

应该是HP DesignJet 130nr， 老Z上面说过。