BitmapToMat can open only ARGB_8888 Bitmap objects (Feature #1283)

Added by Corey Beres over 13 years ago. Updated about 13 years ago.

Status:Done Start date:
Priority:Normal Due date:
Assignee:Andrey Pavlenko % Done:

90%
Category:android
Target version:2.4.0
Difficulty: Pull request:

Description

It appears that the BitmapToMat function cannot open images that don't have the Bitmap.Config.ARGB_8888 Config. Calling the function on images with other types, such as RGB_565, results in the Mat object having zero size and one channel. Using Bitmap.copy to convert the image to ARGB_8888 before calling the function fixes the problem.

Here is an example log output for the source code I attached:

$ adb logcat
08-06 03:18:21.506 18438 18438 D OpenBitmaps: /mnt/sdcard/Images/windsor_chair_0002.jpg: exists=true
08-06 03:18:21.506 18438 18438 D OpenBitmaps: /mnt/sdcard/Images/windsor_chair_0002.jpg: 300x180
08-06 03:18:21.506 18438 18438 D OpenBitmaps: /mnt/sdcard/Images/windsor_chair_0002.jpg: 0.0x0.0

Android 2.3.3 was used. Here is the processor info:
$ adb shell cat /proc/cpuinfo
Processor    : ARMv7 Processor rev 2 (v7l)
BogoMIPS    : 299.95
Features    : swp half thumb fastmult vfp edsp neon vfpv3 
CPU implementer    : 0x41
CPU architecture: 7
CPU variant    : 0x3
CPU part    : 0xc08
CPU revision    : 2

Hardware    : mapphone_CDMA
Revision    : 0000
Serial        : 0000000000000000

OpenBitmapsActivity.java - Source code used to produce the problem (1.5 kB) Corey Beres, 2011-08-06 10:14 am

Associated revisions

Revision 62591a1d
Added by Andrey Pavlenko about 13 years ago

#1283, Mat <->Bitmap converters are updated to support CV_8UC(1,3,4) & non-continuous Mat-s and RGBA_8888 & RGB_565 Bitmaps; Android samples project files are updated according to the latest SDK req-s.

Revision 0588e626
Added by Andrey Pavlenko about 13 years ago

#1283, Mat <->Bitmap converters Java tests.

Revision fe991052
Added by Andrey Pavlenko about 13 years ago

#1283, adding JavaDoc comments for Mat <->Bitmap converters.

Revision c42d61e4
Added by Roman Donchenko over 11 years ago

Merge pull request #1283 from melody-rain:new_mog_mog2

History

#1
Updated by Kirill Kornyakov over 13 years ago

Andrey, could you look at this?

#2
Updated by Andrey Kamaev over 13 years ago

Currently OpenCV supports only ARGB_8888 Bitmap format.

  • Status deleted (Open)

#3
Updated by Andrey Kamaev over 13 years ago

Regarding attached file - you can read image using following code:

mat = Highgui.imread(filename);

#4
Updated by Alexander Shishkov about 13 years ago

  • Description changed from It appears that the [[BitmapToMat]] function cannot open images that don'... to It appears that the BitmapToMat function cannot open images that don't ha... More

#5
Updated by Andrey Pavlenko about 13 years ago

I need to add tests for these converters before closing the record.

#6
Updated by Andrey Pavlenko about 13 years ago

  • Target version set to 2.4.0
  • % Done changed from 0 to 90

#7
Updated by Andrey Pavlenko about 13 years ago

  • Status set to Done

#8
Updated by Andrey Kamaev about 13 years ago

  • Description changed from It appears that the BitmapToMat function cannot open images that don't ha... to It appears that the @BitmapToMat@ function cannot open images that don't ... More

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