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  1. N

    white balance calibration

    what is the best method to set the white balance and color balance? take a photo with gray card? gray+white+black ? or with qp201 or macbeth chart? do I have to set the gray point, white and black point with eyedrop tool?
  2. N

    saving raw/nef after edition

    i want to open raw/nef photo in imagej and perform some color analysis so i need best quality possible. before I do that i need to open raw/nef in photoshop and adjust the curves to match some color, then save it. i open it with ProPhotoRGB, 16 bits. what is the best way not to loose quality or...
  3. N

    Color Analysis of a tooth

    visual tooth color analysis results: 1)i've extracted real shade colors from a professional SpectroShade software because of decimal values I was using a script by Paul MR 2)these colors were too light and gray but okay...(RGB) 3)i've matched color C3 with C3 in my shade... 4)I've copied...
  4. N

    precise Lab color

    so if ps isn't a good software to pick a color from a photo and match with custom shades, does anyone know any alternative software do it? (pick a color in a most precise way, perhaps with L,a,b color mode)?
  5. N

    delta E

    i heard many times on this forum that using photoshop is wrong for this kind of analysis because it's not precise. i keep that in mind but i don't want to buy Mac just to do more precise color drop. i just need to be a little more precise than human eye. especially men are not got (generally) in...
  6. N

    precise Lab color

    how can i convert excel Lab values into small values like yours in excel?should i simply divide L,a and b by some number?
  7. N

    precise Lab color

    it works well with different area sizes.
  8. N

    precise Lab color

    thanks, it works, but strange thing. why the color displayed in this program says that D2 shade is L=70,36 and color drop in ps says L=44,9?
  9. N

    Lab parameters in 3d space

    i was trying to find the closest color to another color by using 16 shades. i think that L,a,b could be used as x,y,z parameters to set color position in 3d space and then measure the distance between colors. am i right or is it useless approach?
  10. N

    precise Lab color

    i have a software which uses very precise color measurements but as L,a,b it uses values like L:70,36 ; a:0,92 ;b=14,47. there are 16 colors in tooth VITA shader. when i take a picture of patients tooth i place on of them near patients tooth and open image in ps. then i'm using color drop to get...
  11. N

    recreate L,a,b color mode

    no, decimal number.
  12. N

    recreate L,a,b color mode

    is is possible to get such color drop values in ps (precision is necessary)? L 67,16 a 5,43 b 23,41
  13. N

    precise Lab color

    as you can see i can't enter decimal values even if i'm working on lab color mode. ok i found a plugin to do that. http://forum.luminous-landscape.com/index.php?topic=54580.0
  14. N

    precise Lab color

    i'd like to recreate such color in ps. those values are measured by American Dental Association Laboratories and are precise, but the difference between samples is very low (L: 65,73 or 67,21) 1)how can i create such precise color is ps? L:66,33 a:0,3 b:8,73 when i eyedropped my samples i had...
  15. N

    delta E

    browsing those articles quickly right now i can see that L,a,b values have already been measured with photospectrometer for vita shades. i will check it with my values and see how precise it is. but going back to my last question...what part of the tooth should i eyedrop?even with photospectrometer.
  16. N

    delta E

    to get accurate sample (vita shaders) i'm going to use ministudio to eliminate shadows and highlights. i must say that my first tooth crown (made with this calculations) was one of the best color matches in 6 years time so it absolutely works for 75% typical cases. 25% are cases were tooth...
  17. N

    delta E

    this is my calculation results: red lines are important to me and they allow me to measure the percentage for colors to mix if theory is correct. thebestcpu - please tell me only: 1)is this the correct line to measure the colors mixture percentage combination? 2)should i measure the...
  18. N

    delta E

    i have a color sample in L,a,b mode used as 3d coordinates. I also know the coordinates of a few other colors (A1,A2,A3,etc) of which A1 and A2 are the closest. A2 in this case is the closest one. how should i measure how many percent of A2 color should I mix with A1 color to get the best match...
  19. N

    color elements

    thanks Paul for that, i will look at it late night. i have created an excel to do that. does anyone know how should I think of finding the perfect mix of shades to match tooth shade? not close but precise. here is what i mean: my shades got color picked values like: A1 L=73 a=4 b=21 A2 L=78...
  20. N

    most accurate color selection

    hello.i'm looking for the most accurate color selection method in photoshop for L,a,b color mode. what i want to achieve is to know the values for L,a and b that would let me enter those values to excel file which will tell me which shade is the closest. so those shaders values are the most...
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