[krita] [Bug 380970] Wrong bit depth per channel reported, no export option to fix

2017-06-09 Thread Brennan Kinney 
https://bugs.kde.org/show_bug.cgi?id=380970

Brennan Kinney  changed:

   What|Removed |Added

 Resolution|WORKSFORME  |WAITINGFORINFO

--- Comment #8 from Brennan Kinney  ---
It's not an issue for me with the library anymore as it was only for
understanding how the data was presented via the API ArrayFire has. I had used
jpg prior with max quality settings and from memory some 0 became 1 and some
255 became 254, which I guess is expected of a lossy format.

Thanks for clarifying everything :)

-- 
You are receiving this mail because:
You are watching all bug changes.

[krita] [Bug 380970] Wrong bit depth per channel reported, no export option to fix

2017-06-09 Thread Boudewijn Rempt 
https://bugs.kde.org/show_bug.cgi?id=380970

Boudewijn Rempt  changed:

   What|Removed |Added

 Status|NEEDSINFO   |RESOLVED
 Resolution|WAITINGFORINFO  |WORKSFORME

--- Comment #7 from Boudewijn Rempt  ---
Maybe use one of the formats that really are just the channel values
concatenated?

-- 
You are receiving this mail because:
You are watching all bug changes.

[krita] [Bug 380970] Wrong bit depth per channel reported, no export option to fix

2017-06-09 Thread Brennan Kinney 
https://bugs.kde.org/show_bug.cgi?id=380970

--- Comment #6 from Brennan Kinney  ---
> How are you using freeimage with these png's?

A library called ArrayFire that allows you to load images onto the GPU. I
wanted to work with the values of 0 and 255 but it threw an error about
FreeImage not being happy with the bitdepth.

I wasn't aware that was an issue with other popular image programs as well or
due to a standard. In that case I guess this isn't a bug for Krita. The outcome
of the export being optimized like that was just unexpected.

-- 
You are receiving this mail because:
You are watching all bug changes.

[krita] [Bug 380970] Wrong bit depth per channel reported, no export option to fix

2017-06-09 Thread Boudewijn Rempt 
https://bugs.kde.org/show_bug.cgi?id=380970

Boudewijn Rempt  changed:

   What|Removed |Added

 Status|UNCONFIRMED |NEEDSINFO
 Resolution|--- |WAITINGFORINFO

--- Comment #5 from Boudewijn Rempt  ---
I think that it's libpng that does that automatically... Or maybe the standard
forces this.

I converted the file to psd and saved the image with gimp and photoshop and
identify gives exactly the same results:

Image: rgb_gimp.png
  Format: PNG (Portable Network Graphics)
  Mime type: image/png
  Class: DirectClass
  Geometry: 9x9+0+0
  Resolution: 37.4x37.4
  Print size: 0.240642x0.240642
  Units: PixelsPerCentimeter
  Type: Palette
  Endianess: Undefined
  Colorspace: sRGB
  Depth: 8/1-bit
  Channel depth:
red: 1-bit
green: 1-bit
blue: 1-bit
  Channel statistics:
Red:
  min: 0 (0)
  max: 255 (1)
  mean: 103.889 (0.407407)
  standard deviation: 125.295 (0.491352)
  kurtosis: -1.85795
  skewness: 0.376889
Green:
  min: 0 (0)
  max: 255 (1)
  mean: 103.889 (0.407407)
  standard deviation: 125.295 (0.491352)
  kurtosis: -1.85795
  skewness: 0.376889
Blue:
  min: 0 (0)
  max: 255 (1)
  mean: 103.889 (0.407407)
  standard deviation: 125.295 (0.491352)
  kurtosis: -1.85795
  skewness: 0.376889
  Image statistics:
Overall:
  min: 0 (0)
  max: 255 (1)
  mean: 103.889 (0.407407)
  standard deviation: 125.295 (0.491352)
  kurtosis: -1.85795
  skewness: 0.376889

  Format: PNG (Portable Network Graphics)
  Mime type: image/png
  Class: DirectClass
  Geometry: 9x9+0+0
  Resolution: 37.4x37.4
  Print size: 0.240642x0.240642
  Units: PixelsPerCentimeter
  Type: Palette
  Endianess: Undefined
  Colorspace: sRGB
  Depth: 8/1-bit
  Channel depth:
red: 1-bit
green: 1-bit
blue: 1-bit
  Channel statistics:
Red:
  min: 0 (0)
  max: 255 (1)
  mean: 103.889 (0.407407)
  standard deviation: 125.295 (0.491352)
  kurtosis: -1.85795
  skewness: 0.376889
Green:
  min: 0 (0)
  max: 255 (1)
  mean: 103.889 (0.407407)
  standard deviation: 125.295 (0.491352)
  kurtosis: -1.85795
  skewness: 0.376889
Blue:
  min: 0 (0)
  max: 255 (1)
  mean: 103.889 (0.407407)
  standard deviation: 125.295 (0.491352)
  kurtosis: -1.85795
  skewness: 0.376889
  Image statistics:
Overall:
  min: 0 (0)
  max: 255 (1)
  mean: 103.889 (0.407407)
  standard deviation: 125.295 (0.491352)
  kurtosis: -1.85795
  skewness: 0.376889
  Colors: 4


Heck, identify gives the same results on the psd file:

Image: rgb.psd
  Format: PSD (Adobe Photoshop bitmap)
  Class: DirectClass
  Geometry: 9x9+0+0
  Resolution: 95x95
  Print size: 0.0947368x0.0947368
  Units: PixelsPerInch
  Type: Palette
  Endianess: Undefined
  Colorspace: sRGB
  Depth: 8/1-bit
  Channel depth:
red: 1-bit
green: 1-bit
blue: 1-bit
  Channel statistics:
Red:
  min: 0 (0)
  max: 255 (1)
  mean: 103.889 (0.407407)
  standard deviation: 125.295 (0.491352)
  kurtosis: -1.85795
  skewness: 0.376889
Green:
  min: 0 (0)
  max: 255 (1)
  mean: 103.889 (0.407407)
  standard deviation: 125.295 (0.491352)
  kurtosis: -1.85795
  skewness: 0.376889
Blue:
  min: 0 (0)
  max: 255 (1)
  mean: 103.889 (0.407407)
  standard deviation: 125.295 (0.491352)
  kurtosis: -1.85795
  skewness: 0.376889
  Image statistics:
Overall:
  min: 0 (0)
  max: 255 (1)
  mean: 103.889 (0.407407)
  standard deviation: 125.295 (0.491352)
  kurtosis: -1.85795
  skewness: 0.376889


So I'm not sure whether your analysis is correct. 

Btw, I know freeimage (http://freeimage.sourceforge.net/) only because it's a
source of bugs where it's used in deepin's qimageio plugins. Or did you mean a
different freeimage? How are you using freeimage with these png's?

-- 
You are receiving this mail because:
You are watching all bug changes.

[krita] [Bug 380970] Wrong bit depth per channel reported, no export option to fix

2017-06-08 Thread Brennan Kinney 
https://bugs.kde.org/show_bug.cgi?id=380970

--- Comment #4 from Brennan Kinney  ---
(In reply to Boudewijn Rempt from comment #1)
> There is an option to save png images as indexed

I've seen that option and I had it unchecked.

-- 
You are receiving this mail because:
You are watching all bug changes.

[krita] [Bug 380970] Wrong bit depth per channel reported, no export option to fix

2017-06-08 Thread Brennan Kinney 
https://bugs.kde.org/show_bug.cgi?id=380970

--- Comment #3 from Brennan Kinney  ---
Created attachment 105988
  --> https://bugs.kde.org/attachment.cgi?id=105988=edit
.png 1-bit per channel

-- 
You are receiving this mail because:
You are watching all bug changes.

[krita] [Bug 380970] Wrong bit depth per channel reported, no export option to fix

2017-06-08 Thread Brennan Kinney 
https://bugs.kde.org/show_bug.cgi?id=380970

--- Comment #2 from Brennan Kinney  ---
Created attachment 105987
  --> https://bugs.kde.org/attachment.cgi?id=105987=edit
.kra file

-- 
You are receiving this mail because:
You are watching all bug changes.

[krita] [Bug 380970] Wrong bit depth per channel reported, no export option to fix

2017-06-08 Thread Boudewijn Rempt 
https://bugs.kde.org/show_bug.cgi?id=380970

Boudewijn Rempt  changed:

   What|Removed |Added

 CC||b...@valdyas.org

--- Comment #1 from Boudewijn Rempt  ---
Krita cannot work with indexed images nternally. There is an option to save png
images as indexed, if possible. Please attach your original .kra file and the
.png file your talking about to the bug report so I can check what's up.

-- 
You are receiving this mail because:
You are watching all bug changes.