android opencv imdecode returns empty Mat!

asked 2019-09-26 12:47:01 -0600

ramprasad90 gravatar image

updated 2019-09-27 07:31:37 -0600

supra56 gravatar image

Code:

public void processPicture( Mat picture ) {
 Mat img = Imgcodecs.imdecode(picture, Imgcodecs.CV_LOAD_IMAGE_UNCHANGED);
}

//picture contains data, when we decode to Mat img returns empty!

Please help with this issue, Thanks in advance.

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Comments

how do you obtain picture ? what is it ? and what do you expect to be there ?

berak gravatar imageberak ( 2019-09-26 12:51:54 -0600 )edit

i will got the ImageReader from camera2 and convert it into mat object and forward to processPicture method.

ramprasad90 gravatar imageramprasad90 ( 2019-09-27 01:00:28 -0600 )edit

why do you think, you have to imencode() it at all, then ? (it expects an image "as on disc", headers, compressed pixels, etc. probably not what you have there)

please check picture.size() and picture.type() (and tell us !)

berak gravatar imageberak ( 2019-09-27 01:10:03 -0600 )edit

Thank you for reply, picture.size():4032x3024 and picture.type():0

ramprasad90 gravatar imageramprasad90 ( 2019-09-27 04:52:00 -0600 )edit

picture.size():4032x3024 and picture.type():0 img.size():0x0 and img.type():0

ramprasad90 gravatar imageramprasad90 ( 2019-09-27 05:03:36 -0600 )edit

i'm quite sure, you can just skip the imdecode(), here (as you already have a "ready-to-use" image in the Mat).

berak gravatar imageberak ( 2019-09-27 05:04:29 -0600 )edit

Thank you for giving reply.

ramprasad90 gravatar imageramprasad90 ( 2019-09-27 05:11:21 -0600 )edit
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