Setting color with Graphics2D on a BufferedImage with IndexColorModel

I hava a BufferedImage from a GIF, the ColorModel is a IndexColorModel . Since i finally want to write back the modified image to a GIF , i don't want to change the color model, especially my application need to absolutely keep the palette as it is used in the original GIF.
Then i did create a Graphics2d from this BufferedImage.
Then i call setColor() and drawString().
My problem: if I use a color that is not contained in the palette, or if I call drawString() with font antialiasing , which will produce pixels with a color not contained in the palette. How is are these new colors mapped to the palette color?
Or how can i controll this mapping ?
Unfortunately I did not found the source code from SunGraphics2D , so that I can see myself what exactly is goning on inside when calling setColor and drawSting und the circumstances described above.
Any ideas where I can get the source code from ?

I've just examined some examples and can confirm that the closest color instead of specified is used when you try to draw something on the indexed image. But I was not a success to find out the exact algorithm because of its' native implementation - I can only say it works well.
I think you want to control the result palette only to keep its' size less then 256 colors. According to described above you should not afraid of palette increasing if you draw on an indexed image (with IndexColorModel). But if you want to draw something with the exact color then you have 2 chances:
1) Before drawing you can replace (or add if it's possible) any color in a palette with the specified color (which you plan to use for drawing) using your own algorithm.
2) You can convert your image with indexed color model to for example image with direct color model and then draw anything with any colors. After that you should need to quantize the result image back to an indexed palette with the desired color bit depth.

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CTRL + ALT + Click on the part of the component that you want to change. This brings up the Hidden Dom Inspector, background of component will be surrounded with a red outline (Make sure the red outline is surrounding the part of the tabset you want to change), Now you go to properties sheet and click the ellipses next to rules property this will pop up a dialog you look in this list (At the top) to see the default style classes that are affecting the rendering of the component outlined in red. (You will be able to select different sections of a single component) then you just rewrite the style class that you want to change in your Stylesheet (You will not find the styleclass that you want to change because it is a part of your theme .jar but as long as you name it exactly the same and place in your stylesheet it will override the theme .jar style classes) it's actually very easy -- you were right should be a piece of cake for a guru. Don't have the link handy but you can check out Winston's Blog on changing Table Formatting to get this information...It is EXTREMELY useful if you want your apps to have a custom look and not default that comes with Creator Themes.
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Managing Color with LR and the Canon Pixma Pro 9000 10.1.2.0 printer driver

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Dear DYP: Unfortunately, those choices are not available in the 10.1.2.0 Canon Printer driver. There are only 2 radio buttons, ColorSync and Vendor Matching. ColorSync then provides a drop-down menu, with no choice for turning off the printer driver.
But I think I found the answer. I found a deeply buried FAQ on the Canon site (no direct URL; sorry!) Here it says:
"Issue: How do I disable the printer driver color correction when using the CUPS driver in Mac OS X 10.5.x?
Solution: Change color management options for printing (Mac OS X 10.5.x)
Change color management options for printing
Open the document you wish to print.
Click 'File' and then click 'Print.'
Note: If the Print window contains only two pop-up menus, click the triangle beside the Printer pop-up menu for expanded options.
Select 'Color Matching' from the Print Options pop-up menu.
Select 'ColorSync' if you want the application you are using, and not the printer driver, to control the color management of the printed output.
Note: If you are using Adobe Photoshop CS2 or CS3 and have selected 'Let Photoshop Determine Colors', the 'Color Matching' from the Print Options pop-up menu is automatically set to 'ColorSync.'
Select 'Vendor Matching' if you want the printer driver to control the color management of the printed output."
I tried it, and chose "Automatic" as a choice in ColorSync. The choices under "Color Options" are then greyed out, implying that the Canon driver is now turned off.
The prints came out great, with no color cast, and a little brighter than the printer managed prints.
So, Vendor Managed means printer manages, ColorSync means LR manages.
Thanks, everyone, for keeping me going on tracking this down!

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Why do colors with identical cmyk numbers look very different?

i thought i had this problem solved, but here it is again with a new wrinkle. i have this gorgeous orchid bg box, cmyk 9-10-0-0 in a file with cmyk transparency blend space. same set up in file 2. i create a new bg box with the same numbers and it's a whole different color. there must be some parameters mismatched. what else should i be looking for to make sure the file setups are identical?

Attached is an image of what the color picker looks like after I have used the eyedropper to sample what I believed to be a swath of CMYK color.
It looks to me like the image you are sampling from is an RGB image. You can check that by opening the Links panel and clicking on the link, which will display the image's color space and profile.
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Your background isn't CMYK it's RGB. When you turn on Overprint or Separation Preview, you get a preview of how your out-of-gamut RGB violet color will convert to CMYK.

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When I enable on screen proofing with the matching profile, I can see that the picture gets slightly brighter, but way less that what I get on the prints.
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System configuration:
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Sorry for posting this under the "Book" forum - mistake from my side
Message was edited by: tembla

Hi Thomas,
With my iP8500 I leave it on, so it appears to be specifically the behavior of the Pro9000. I did a little more testing last night as I recently re-calibrated my system, and have another method you can try. Instead of turning off "Black Point Compensation" which can leave photos with lots of shadow detail a bit too dark, open up the "Printer Settings" window and go to the color management options. The only thing you can change here is the brightness setting. Change it from Normal to Dark, leaving BPC turned on. I think you'll be pleased with the results. Good luck!

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hi ,
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kiran

Hi Kiran .
1.Cell Color.
While Building Fieldcatalog ,there is one field called
EMPHASIZE.You have to set like this .
i_field-emphasize = 'C26'.
2.ROW COLOR.
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TYPE-POOLS slis.
DATA: BEGIN OF i_pa0001 OCCURS 0,
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PERFORM fieldcat.
PERFORM layout_build.
PERFORM dispaly .
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w_field-fieldname = 'PERNR'.
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w_field-tabname = 'I_PA0001'.
w_field-seltext_m = 'SUBTY'.
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CLEAR w_field.
ENDFORM. " fieldcat
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FORM dispaly .
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EXPORTING
I_INTERFACE_CHECK = ' '
I_BYPASSING_BUFFER = ' '
I_BUFFER_ACTIVE = ' '
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I_CALLBACK_PF_STATUS_SET = ' '
I_CALLBACK_USER_COMMAND = ' '
I_CALLBACK_TOP_OF_PAGE = ' '
I_CALLBACK_HTML_TOP_OF_PAGE = ' '
I_CALLBACK_HTML_END_OF_LIST = ' '
I_STRUCTURE_NAME =
I_BACKGROUND_ID = ' '
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I_GRID_SETTINGS =
 is_layout = w_layout
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IT_EXCLUDING =
IT_SPECIAL_GROUPS =
IT_SORT =
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IS_VARIANT =
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IT_EVENT_EXIT =
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I_SCREEN_START_LINE = 0
I_SCREEN_END_COLUMN = 0
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IT_ALV_GRAPHICS =
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IT_ADD_FIELDCAT =
IT_EXCEPT_QINFO =
I_HTML_HEIGHT_TOP =
I_HTML_HEIGHT_END =
IMPORTING
E_EXIT_CAUSED_BY_CALLER =
ES_EXIT_CAUSED_BY_USER =
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EXCEPTIONS
PROGRAM_ERROR = 1
OTHERS = 2
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
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ENDIF.
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FORM get_data .
SELECT pernr subty
FROM pa0001
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UP TO 10 ROWS.
LOOP AT i_pa0001.
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ENDLOOP.
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FORM layout_build .
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I hope it helps u .
Thanks,
Venkat.O

Pantone Colors with CMYK Colors?

Dear all!
I am LUCK. I am wondering about Pantone Colors with CMYK Colors. It's that I got 1 Pantone Color from my customer and then I changed it to the equivalent CMYK Color. Will I get different colors when changing from Pantone to CMYK because I will print with CMYK Printing Process? Anyway, I am wondering whether the Pantone color is the fix and specific color or not. I mean when I print the Pantone Color, I will get the same result as I print before. Is it right?
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Will I get different colors when changing from Pantone to CMYK
Yes, the colors will be different. But whether the difference is noticable depends upon the specific spot ink you are trying to match. It also depends upon the specific use of the color. Fact is, human color perception is very adaptive. Colors that are "mathematically" equivilant according to some colorimetric algorithm are not necessarily perceived as equivilant by human eyes, because much depends upon environment (adjacent colors, etc.)
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All the above is just one reason why contract proofs are still important. If your customer is very picky about his spot color, then he needs to understand that converting it to CMYK is merely an approximation, and perfect matching is simply not possible. That's one reason why spot inks exist in the first place. If he is not willing to pay for five-color printing, then he will likely have to settle for a minor compromise.
JET

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After I chose a color with the eye dropper tool, the filler fills in a grayer version of the color, for some reason.

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Greetings,
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There aren't that many other options.
jPo

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This question was solved.
View Solution.

Hi,
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Say thanks by clicking the Kudos thumb up in the post.
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