Android Question Saving part of a picture / butmap: Blurred results

[grafsoft]

Hi,

I am following an example on how to save only a part of an image (savepartbitmap by Erel).

I load an image 2592*1944 and want to save it 2592*1457, because I want to save only the part of a photo I can see in the finder.

It works, but the picture is very blurred. However, the size seems OK.

Thank you
Peter

   Dim cvsImage As Canvas
   Dim Bitmap1, Bitmap2, Bitmap3 As Bitmap
   Dim RectSrc, RectDest As Rect
   Bitmap1.Initialize(Main.outdir,Main.thepic)
'   Bitmap2.InitializeMutable(96, 64)
'   cvsImage.Initialize2(Bitmap2)
'   RectSrc.Initialize(50, 50, 50 + 96, 50 + 64)
'   RectDest.Initialize(0, 0, 96, 64)
   Bitmap2.InitializeMutable(wi,he)
   cvsImage.Initialize2(Bitmap2)
   dim x as int = 0
   dim y as int = 243
   dim wi as int = 2592
   dim he as int = 1457
   RectSrc.Initialize(x,y,x+wi,y+he)
   RectDest.Initialize(0, 0, wi,he)
   cvsImage.DrawBitmap(Bitmap1, RectSrc, RectDest)
   Dim Out As OutputStream
   Out = File.OpenOutput(Main.outdir,Main.thepic, False)
   ' Bitmap2.WriteToStream(Out, Settings.jpgquality, "JPEG")
   Bitmap2.WriteToStream(Out, 100, "JPEG")
   Out.Close

 

[Erel]

What is the output of Log(Bitmap1.Width)?

 

[grafsoft]

2592, height is 1944, as expected

 

[Erel]

Might be a memory issue. Your code will require quite a lot of memory to work properly (check the logs and look for downsampling messages).

Maybe it will be better to use this method from the Jpeg library: https://www.b4x.com/android/help/jpeg.html#jpeg_loadjpegarea

 

[grafsoft]

Thank you, this works better! But slower Well I cannot have everything ...