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strange PNG from Adobe Fireworks

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strange PNG from Adobe Fireworks Eric P 18 Oct 04:26
  strange PNG from Adobe Fireworks norman 18 Oct 09:33
   strange PNG from Adobe Fireworks Owen 18 Oct 09:58
   strange PNG from Adobe Fireworks norman 18 Oct 10:42
  strange PNG from Adobe Fireworks Sven Neumann 18 Oct 11:26
   strange PNG from Adobe Fireworks Eric P 21 Oct 04:11
Eric P
2008-10-18 04:26:28 UTC (over 16 years ago)

strange PNG from Adobe Fireworks

Check out this png. I'm not sure if it is editable in the GIMP. http://i34.tinypic.com/rtzshs.png

First of all it's an indexed image. You'll see two white arrows on the right hand side. Switch the mode to RGB and you'll see two new alpha transparent arrows appear on the left hand side (!?)

Checking the header of the image I see Adobe Fireworks in there. Any ideas what this anomaly of a png is?

Eric P.

norman
2008-10-18 09:33:37 UTC (over 16 years ago)

strange PNG from Adobe Fireworks

On Fri, 2008-10-17 at 21:26 -0500, Eric P wrote:

Check out this png. I'm not sure if it is editable in the GIMP. http://i34.tinypic.com/rtzshs.png

First of all it's an indexed image. You'll see two white arrows on the right hand side. Switch the mode to RGB and you'll see two new alpha transparent arrows appear on the left hand side (!?)

Checking the header of the image I see Adobe Fireworks in there. Any ideas what this anomaly of a png is?

I went to the URL but all I got was a blank page.

Norman

Owen
2008-10-18 09:58:38 UTC (over 16 years ago)

strange PNG from Adobe Fireworks

On Fri, 2008-10-17 at 21:26 -0500, Eric P wrote:

Check out this png. I'm not sure if it is editable in the GIMP. http://i34.tinypic.com/rtzshs.png

First of all it's an indexed image. You'll see two white arrows on the right hand side. Switch the mode to RGB and you'll see two new alpha transparent arrows appear on the left hand side (!?)

Checking the header of the image I see Adobe Fireworks in there. Any ideas what this anomaly of a png is?

I went to the URL but all I got was a blank page.

No you didn't. You got a transparent image with two whit arrows. What colour is your browser background?

Try right clicking on the URL and "Save image as"

Owen

norman
2008-10-18 10:42:59 UTC (over 16 years ago)

strange PNG from Adobe Fireworks

Check out this png. I'm not sure if it is editable in the GIMP. http://i34.tinypic.com/rtzshs.png

First of all it's an indexed image. You'll see two white arrows on the right hand side. Switch the mode to RGB and you'll see two new alpha transparent arrows appear on the left hand side (!?)

Checking the header of the image I see Adobe Fireworks in there. Any ideas what this anomaly of a png is?

I went to the URL but all I got was a blank page.

My browser has a white background and, as was suggested in the reply sent to me, I right clicked on the blank page and saved the image to my desktop. I opened the image in Image Viewer and there was a checkered rectangle with a white arrow at the top right corner pointing to the right and another white arrow in the bottom right corner pointing downwards. There is also a pale grey arrow pointing to the right in the top left corner and another similar arrow pointing downwards in the bottom left corner. The 2 grey arrows were not noticeable when the image was opened in Gimp but the checkered rectangle and the white arrows were there.

Norman

Sven Neumann
2008-10-18 11:26:39 UTC (over 16 years ago)

strange PNG from Adobe Fireworks

Hi,

On Fri, 2008-10-17 at 21:26 -0500, Eric P wrote:

Check out this png. I'm not sure if it is editable in the GIMP. http://i34.tinypic.com/rtzshs.png

First of all it's an indexed image. You'll see two white arrows on the right hand side. Switch the mode to RGB and you'll see two new alpha transparent arrows appear on the left hand side (!?)

Checking the header of the image I see Adobe Fireworks in there. Any ideas what this anomaly of a png is?

rtzshs.png...
Image Width: 20 Image Length: 110
Bitdepth (Bits/Sample): 2
Channels (Samples/Pixel): 1
Pixel depth (Pixel Depth): 2
Colour Type (Photometric Interpretation): PALETTED COLOUR with alpha (3 colours, 3 transparent) Image filter: Single row per byte filter Interlacing: No interlacing
Compression Scheme: Deflate method 8, 32k window Resolution: 2834, 2834 (pixels per meter) FillOrder: msb-to-lsb
Byte Order: Network (Big Endian)
Number of text strings: 1 of 9
Software (xTXt deflate compressed): Adobe Fireworks CS3 Offsets: 0, 0

This image uses an indexed palette with transparency information. This is not fully supported in GIMP. The PNG loader seems to handle it nicely, but the GIMP image display has some special code that thresholds the alpha channel for images in indexed mode. This is because the code was written for GIF images. The projection in indexed mode simulates the alpha capabilities of the GIF format, where a pixel is either fully transparent or opaque.

Sven

Eric P
2008-10-21 04:11:13 UTC (over 16 years ago)

strange PNG from Adobe Fireworks

Sven Neumann wrote:

Hi,

On Fri, 2008-10-17 at 21:26 -0500, Eric P wrote:

Check out this png. I'm not sure if it is editable in the GIMP. http://i34.tinypic.com/rtzshs.png

First of all it's an indexed image. You'll see two white arrows on the right hand side. Switch the mode to RGB and you'll see two new alpha transparent arrows appear on the left hand side (!?)

Checking the header of the image I see Adobe Fireworks in there. Any ideas what this anomaly of a png is?

rtzshs.png...
Image Width: 20 Image Length: 110
Bitdepth (Bits/Sample): 2
Channels (Samples/Pixel): 1
Pixel depth (Pixel Depth): 2
Colour Type (Photometric Interpretation): PALETTED COLOUR with alpha (3 colours, 3 transparent) Image filter: Single row per byte filter Interlacing: No interlacing
Compression Scheme: Deflate method 8, 32k window Resolution: 2834, 2834 (pixels per meter) FillOrder: msb-to-lsb
Byte Order: Network (Big Endian)
Number of text strings: 1 of 9
Software (xTXt deflate compressed): Adobe Fireworks CS3 Offsets: 0, 0

This image uses an indexed palette with transparency information. This is not fully supported in GIMP. The PNG loader seems to handle it nicely, but the GIMP image display has some special code that thresholds the alpha channel for images in indexed mode. This is because the code was written for GIF images. The projection in indexed mode simulates the alpha capabilities of the GIF format, where a pixel is either fully transparent or opaque.

Sven

Thanks for the reply.

Eric P.