QPCARD 答客問

QPcard 101 答客問

Q: Is the gray patch on QPcard 101 neutral gray?
問: QPcard 101的灰色區塊(灰塊)是否為中間灰調?

A: When we designed our 101 card we looked at the standard 18 % gray card from Kodak.
We choose pigments that would give as straight curves as possible within the visible field.
Our gray reflects 18% light in the blue area, 17% in the green and 16% in the red area.
The L*a*b values for our gray are L = 48.26, a = –0.33 and b = –0.85.
This is within the tolerance for measuring instruments in the graphic arts field.

答:當我們在設計我們的101卡時,首先檢視Kodak的標準18%灰卡
我們選用了在可見光域,可以直接呈現適當曲線的色料.
我們的灰值藍光域反射18% 綠光域17% 紅光域16%
L*a*b值在我們的灰塊為L = 48.26, a = –0.33 and b = –0.85.
這些數值都在繪圖意工藝產業測量儀器的容許範圍.

Q: Can the gray patch be used for setting exposure, like the Kodak gray card?
問:灰塊能像Kodak灰卡被用來設定曝光值?

A: Yes, it can be used the same way as a Kodak gray card is used, but we do not recommend it.
It is much better to check the histogram and make sure that no dark and no bright tones
in the subject are being cut. Use the gray patch as a neutral reference only.

答:是的.它能夠像Kodak灰卡同樣方法來運用.但是我們並不建議
最好是檢查色階圖並確認主題的黑調和亮部沒有被割除
灰塊僅用在參考中間灰調.

Q: Can I use the white and black patches on the card
to set white and black point in the image?
問:我能將101卡白塊和黑塊用來設定影像內白點和黑點?

A: Only if you have one card with the black patch in the shadow of the subject and
one card with white patch in a high-light. This is a very good method for subjects
that don’t have really light and dark parts.

答:只有在您將一卡的黑塊放置於主題的暗部.而一卡的白塊放置於主題的亮部
對於沒有真正暗部和亮部的主題.這是非常好的方法.

Q: What are the measured values of QPcard 101?
問:QPcard 101的量測值為何?

A: Click the “Products Specifications” button in the menu and get a PDF with all details.
答:點選網頁"產品規格"按鈕.取得一份有明細資料的PDF檔案.

FAQ QPcard 201
QPcard 201 答客問

Q: The colors on QPcard 201 seems to be painted and not printed on the card, why?
問:QPcard 201卡上的色彩似乎像是塗佈上去,而非印刷,為什麼?

A: Yes, the colors are painted on the card. All 27 colors are mixed separately
before being painted on the card. This rather expensive method gives several advantages.
Normally colors are printed using only four basic colors: Cyan, magenta, yellow and black.
In photographic paper only C, M and Y are used. With these basic colors
you can mix most desired colors. The problem with using only C, M, Y, K is that
only a few pigments or dyes are being used, and thus gives color mixtures with metamerism problems.
Look at a color sample under different lights (e.g. daylight,
tungsten, fluorescent light) and it will change in color. Our colors are all
separately mixed from pigments with the spectral properties in mind.

答:是的,卡上的色彩是塗佈上去,所有的27種顏色塗佈上去前都獨立調製
常態而言顏色在印刷上只用黑黃藍紅四種基本色料,相紙只用黃藍紅
利用這些基本色料可以混調出大部分需要的顏色,
只用黑黃藍紅四種基本顏色少數色料或染料的問題,在於混調出的顏色會有同體異色問題
看看一個彩色樣本在不同光線下 如日光 鎢絲燈光,瑩光燈下改變嚴顏色,
我們的色塊全部由色料獨立調製具有光譜特質內涵.

Q: How fade resistant is the QPcard 201?
問:QPcard 201卡抗拒退色性如何?

A: The painted color layers are thick and less sensitive to fading when exposed
to light. A QPcard 201 (or QPcard 101) is very stable and can be exposed even
to sun-light for a long time without fading. A color sample printed with C, M, Y, K inks
or printed on color photo paper is much more fade sensitive.

答:塗佈的顏料層較厚 曝露在光線下比較少退色感應.
QPcard 201卡(或QPcard 101)非常穩定,可曝露在陽光下長時間而不退色
用黑黃藍紅油墨印刷或彩色相紙顯像的彩色樣本,較容易退色.

Q: Is 27 colors enough for high quality color correction?
問:27種顏色是否足夠作為高品質彩色校正?

A: The more different colors you have, the easier it is to make corrections.
But many colors also increases the price of the cards. We found that 27 is a good compromise.
答:您有愈多不同種顏色,彩色校正就愈容易,但是愈多種顏色也增加色卡的價錢,
我們覺得27種顏色是很好的妥協.

Q: How did you choose the colors on the card?
問:你們如何選擇色卡上的顏色?

A: The human eye is more sensitive to differences in some specific colors.
For instance neutral grays, skin tones, chlorophyll greens and sky blues,
so we choose these colors first. Then we choose saturated red, green, blue, cyan, magenta and yellow.
After that we tried to fill the remaining big cavities in the color space.

答:人類眼睛對某些特殊顏色的差別較為敏感,
例如中間灰色,皮膚調,葉綠素綠,天空藍,我們預先選擇了這些顏色
然後飽和的紅綠藍洋紅靛藍和黃色,
之後我們嘗試填入色彩空間的剩餘大凹處.

Q: What are the measured values of QPcard 201?
問:QPcard 201的量測值為何?
A: Click the “Products Specifications” button in the menu and get a PDF with all details.
答:點選網頁"產品規格"按鈕,取得一份有明細資料的PDF檔案.

Q: Are there any other color correction softwares that support the QPcard 201?
問:有無其他色彩校正軟體支援QPcard 201?

A: Not at the moment. If any software producer would like to include QPcard 201 among
their supported cards they are very welcome.
答:目前沒有.假若任何軟體廠商願意將QPcard 201列入他們支援的色卡,他們非常受歡迎.

Q: QPcard 201 is included in all sample images in QPcolorsoft 501.
Do I have to include the card in every image in order to correct it?
問:QPcard 201附在QPcolorsoft 501的所有樣品影像裏
是否我必須要將該卡放入要校色的每一影像裏?

A: No, of course not. We included the card in the sample images in order to make
them easier to correct. When you use QPcard 201 in a real situation, you first set
the white balance in your camera to a fixed position. Then you take a sample image including
the card in a light that is typical for your subject. After that you take
all your pictures of the subject in the same light. When the pictures are filed in
your computer, you open the first sample image with the card, create a correction profile for
the whole series of pictures and batch process them all in QPcolorsoft.

答:當然不必要.QPcard 201附在QPcolorsoft 501的所有樣本影像裏,只是方便軟體校色功能
當QPcard 201實況運用時,您首先將相機對固定點設定白平衡,您將主題在代表性光線下拍成附
有色卡的樣本影像,然後拍下同樣光線所有主題照片當這些照片在您的電腦存檔後,開啟第一張
附有色卡的樣本影像,產生一份作為所有照片用的校色特性檔案再以QPcolorsoft批次處理所有影像.

QPcolorsoft 501答客問

Q: Is the color correction profile created in QPcolorsoft 501 a so called ICC profile?
問:QPcolorsoft 501產生的校色特性檔案是否為通稱的ICC特性檔案?

A: No. An ICC profile do have some advantages like compatibility between different
softwares supporting ICC profiles. However, there are some disadvantages as well.
When we created our software we wanted to have a greater freedom than ICC allows.
We also realized that we got a more accurate color correction when we processed
the images twice, in a double loop. Double processing is not supported with ICC profiles.

答:不是.一份ICC特性檔案確實在都支援ICC特性的不同軟體之間有相容性的優點,但是也有部分缺點
我們在製作我們的軟體時我們要求比ICC能夠有更大自由度,我們發覺我們以雙迴路處理影像兩次時
得到更正確的色彩校正ICC特性並不支援兩次處理影像.

Q: What is Neutral, Sinar and Velvia in the References menu?
問:在軟體界面上參照中性, Sinar, Velvia是什麼？

A: The aim with QPcolorsoft 501 is to get images with desirable colors. The opinion of
how desirable colors should look like varies. In this version of the software we have
looked at the colors of the card in three different ways.“Neutral” represents color values
measured direct on the card with an instrument called spectrophotometer.
“Sinar” represents the color values we got when we used a professional Sinar studio camera
and took a picture of a subject including QPcard 201. We adjusted the picture in way we found
satisfactory for the subject. Then we measured the color values from the card in the picture.
“Velvia” represents color values from a Fujichrome Velvia film. We took a picture of
QPcard 201 in a photo studio using professional camera and light. The 6 x 7 cm slide was
then scanned neutral in an Imacon scanner. It is easy to use all three references and then
decide which one suits your taste.

答:QPcolorsoft 501的目標在於將影像得到企求的顏色
企求的顏色看起來該如何,見解上就有差距
在這個版本我們以三種方式來檢視卡上的顏色
”中性”代表以光譜計儀器直接量測色卡的色彩數值
”Sinar”代表的色彩數值 是我們將QPcard 201色卡以Sinar專業攝影棚相機拍照取得
我們調整影像對照於主題直到滿意 然後量測影像裏色卡的色彩數值
”Velvia”代表從富士正片Velvia的色彩數值
我們在攝影棚以專業相機和光線拍下QPcard 201色卡 再以Imacon掃瞄器中性掃瞄6x7公分正片.

使用這三種參照值都很容易,再決定那一種較適合您的品味.

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