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Thread: Contact sheet and image background

  1. #1
    IV Newbie
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    Default Contact sheet and image background

    Hi,
    Could anyone help with this problem? I need create contact sheet from icons but all pictures in generated file have a black background. I want white background only.

    You can see it in result.zip:
    • ivThumb.png show what I see in thumbnails windows
    • ivContact.png show result from contact sheet

    I enclose some source files to make test (export.zip).
    Any suggestions?

    Thanks
    Mila
    Attached Files Attached Files

  2. #2
    Moderator Enterprise User Bhikkhu Pesala's Avatar
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    Default

    Properties, Viewing, Main Window Colour. Change it to White.

  3. #3
    IV Newbie
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    Unhappy

    It does not help. Irfanview show icons well. I have the problem in the generated contact sheet files.
    Try it with files from export.zip
    Mila
    Last edited by Mila; 07.10.2008 at 11:07 AM.

  4. #4
    Moderator Enterprise User Bhikkhu Pesala's Avatar
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    Default

    To get transparency you need to save as a file — PNG with transparency.

    You can do it directly or add the transparency after creating the contact sheet in IrfanView window.
    Attached Images Attached Images  

  5. #5
    Advanced User matera's Avatar
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    Default

    It doesn't matter what the settings are, the background color that is set as transparent is shown opaque in the contact sheet. I don't think there is any way to overcome it. I tested it with PNG and GIF images with different transparent colors, the actual colors showed. It doesn't make any difference to change whether thransparency is shown in the viewer, or the viewer background. It is akin to the inability to paste transparent. Making the contact sheet transparent won't help if some of the images have different transparency colors...
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  6. #6
    Professional User Skippybox's Avatar
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    Lightbulb Workaround

    This is indeed a problem, and there are few ways to overcome it. There are a couple of solutions I would imagine, but I will give you the most workable one.

    Hopefully all your images are the same size 32x32, but if not, you can adjust.

    1. Change your main window color to white
    2. Change your thumbnail options to 50x50 and uncheck Resample, Paint thumbnail borders, and Stretch small images to thumbnail size.
    3. Make sure your JPG settings are high quality by choosing 100 and Disable color subsampling (easiest way is to go through the batch conversion dialog).
    4. Select your images and choose File>Save selected thumbs as single images.
    5. Now select your new JPG files and start the batch conversion dialog. Type in a rename pattern to crop the _t. Output as PNG and select Advanced and choose CROP with the settings:


    • X-pos: 9
    • Y-pos: 9
    • Width: 32
    • Height: 32
    • Start corner: Left top


    Now you should have images that will be more compatible with the contact sheet!

    Click image for larger version. 

Name:	IconsContactSheet.png 
Views:	265 
Size:	4.0 KB 
ID:	890

    Alternatively, if it isn't that much trouble you could just take the result sheet with the black backgrounds and touch them up with the Paint dialog. But of course that isn't very automated.
    Last edited by Skippybox; 08.10.2008 at 06:02 PM.

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