Shop OBEX P1 Docs P2 Docs Learn Events
PNG format problems — Parallax Forums

PNG format problems

Timothy D. SwieterTimothy D. Swieter Posts: 1,613
edited 2010-04-28 22:42 in General Discussion
I attached a PNG image that I got from CircuitPeople.com. I use CircuitPeople as a gerber checker for all my design and also I download the images for use in documentation. I recently tried importing the images in a couple programs and I would get a completely black image. When I drop the image on a web browser the image displays fine, but in the cad program I was using it would give me an all black image. I then tried to convert the PNG to JPG using a couple different web based converters, but they return an all black image as well. MS Paint also returned an all black image. So, any suggestion on what may be wrong with the format of this file? Or is there a convert that I can use to get the image to a clean and stable format so that I can import it to CAD and other documents?

PS - I notice the forums thumbnail creator even makes the image all black, but if you click on the image it should open and display correctly.

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Timothy D. Swieter, E.I.
www.brilldea.com - Prop Blade, LED Painter, RGB LEDs, 3.0" 16:9 LCD Composite video display, eProto for SunSPOT, PropNET, PolkaDOT-51
www.tdswieter.com
test.png
960 x 960 - 76K

Comments

  • computer guycomputer guy Posts: 1,113
    edited 2010-04-28 02:35
    Just testing some ideas. smile.gif

    Test2 - Same as your original
    Test3 - Saved as PNG8 (2 colours)
    Test4 - Saved as PNG8 (2 colours, no transparency)
    Test5 - Saved as PNG8 (2 colours) with original as 16bit

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    "powered by Propeller" domed stickers $1.50 - Find them here
    Check out my Design and Technology project for my Higher School Certificate www.ecosureblog.net

    The Sarah Myatt Fund - Help Sarah and Her Family Fight Quadriplegia HERE

    Post Edited (computer guy) : 4/28/2010 2:45:41 AM GMT
    test2.png
    960 x 960 - 59K
    test3.png
    960 x 960 - 10K
    test4.png
    960 x 960 - 10K
    test5.png
    960 x 960 - 26K
  • Timothy D. SwieterTimothy D. Swieter Posts: 1,613
    edited 2010-04-28 02:39
    So what did you do? Are you somehow lightening the image?

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Timothy D. Swieter, E.I.
    www.brilldea.com - Prop Blade, LED Painter, RGB LEDs, 3.0" 16:9 LCD Composite video display, eProto for SunSPOT, PropNET, PolkaDOT-51
    www.tdswieter.com
  • computer guycomputer guy Posts: 1,113
    edited 2010-04-28 02:47
    Ok, after some research and testing it would appear that the "Parallax Thumbnail Generator" converts transparent backgrounds to black.
    Your other software must also do this.

    Which is why if you inver the image and make the black white, when the transparent background gets changed to black you can still see the image.

    I hope this helps. smile.gif

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    "powered by Propeller" domed stickers $1.50 - Find them here
    Check out my Design and Technology project for my Higher School Certificate www.ecosureblog.net

    The Sarah Myatt Fund - Help Sarah and Her Family Fight Quadriplegia HERE
    test6.png
    960 x 960 - 60K
  • Timothy D. SwieterTimothy D. Swieter Posts: 1,613
    edited 2010-04-28 21:01
    OK. Good detective work. I am still missing something though - what is the process to convert the files I have to work png or jpg files? I just tried Paint. I import the image. The image is all black. I try to invert the colors, now the image is all white. What process did you do?

    Maybe I need to by my license to Adobe Fireworks finally - I've been putting it off.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Timothy D. Swieter, E.I.
    www.brilldea.com - Prop Blade, LED Painter, RGB LEDs, 3.0" 16:9 LCD Composite video display, eProto for SunSPOT, PropNET, PolkaDOT-51
    www.tdswieter.com
  • Timothy D. SwieterTimothy D. Swieter Posts: 1,613
    edited 2010-04-28 22:22
    I've downloaded Gimp. I had forgotten about this great fee image editing program. Gimp had no problem opening and displaying the file. I then exported it to jpg and all looks good so far. Time to continue documentation.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Timothy D. Swieter, E.I.
    www.brilldea.com - Prop Blade, LED Painter, RGB LEDs, 3.0" 16:9 LCD Composite video display, eProto for SunSPOT, PropNET, PolkaDOT-51
    www.tdswieter.com
  • mctriviamctrivia Posts: 3,772
    edited 2010-04-28 22:41
    you can export to png also just make sure you chose to replace the clear with white.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Lots of propeller based products in stock at affordable prices.

    Free shipping on orders over $100 and a Free LCD screen for orders over $200. Today Only(April 28th, 2010)

    propmodule.com will be closed May 1-10th. Orders made in that time will be shipped on the 11th.
  • computer guycomputer guy Posts: 1,113
    edited 2010-04-28 22:42
    I use Adobe Photoshop CS3, but thats overkill for this. Like you said, gimp does the job and is free.
    Glad that solved your problem.

    Best of luck with your documentation.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    "powered by Propeller" domed stickers $1.50 - Find them here
    Check out my Design and Technology project for my Higher School Certificate www.ecosureblog.net

    The Sarah Myatt Fund - Help Sarah and Her Family Fight Quadriplegia HERE
Sign In or Register to comment.