java - Color changes when turning Blob from SQLite database to a bitmap and then a mat -

so have image put in blob in sqlite database

what next read out blob database (so turn blob bitmap). turn bitmap mat (cause need use feature descriptor) end following mat:

as can see, colors wrong. code:

    bitmapfactory.options bmpfactoryoptions = new bitmapfactory.options();                         bmpfactoryoptions.inpreferredconfig = bitmap.config.argb_8888;                         bmpfactoryoptions.inscaled = false;                         bmpfactoryoptions.outheight = 240;                         bmpfactoryoptions.outwidth = 320;                         // decodes blob bitmap                         byte[] blob = contact.getmp();                         bytearrayinputstream inputstream = new bytearrayinputstream(blob);                         bitmap bitmap = bitmapfactory.decodestream(inputstream);                         bitmap scalen = bitmap.createscaledbitmap(bitmap, 320, 240, false); mat imagemat = new mat();                         utils.bitmaptomat(scalen, imagemat); 

i need output image same input, doing wrong?

update:

when read bitmap image with

    try {                         fileoutputstream out = new fileoutputstream("mnt/sdcard/test.png");                         bitmap.compress(bitmap.compressformat.png, 90, out);                  } catch (exception e) {                         e.printstacktrace();                  } 

it gives image right colors,so color changing has converting bitmap mat.