convertTo performance in Android native code

sh
11 ●1

I working on developing app for android os. I write the code in c++ and use jni.

I have to convert mat from Mat3f to Mat3b in the native c++ code.

I use convertTo :

floatImg.convertTo(ucharImg, CV_8UC3);

ucharImg type is cv::Mat3b, floatImg type is cv::Mat3f.

the issue is the performance of this code in android:

on android this convertTo code takes ~2300 milliseconds! (on window all my function takes ~150 milliseconds)

Is there is a solution to this performance issue?

1 answer

sh
11 ●1

The issue solved. I wrote the conversion in c++ code - loop on floatImg.data an convert each pixel to uchar.

ucharImg.data[i] = (uchar)((float)floatImg.data)[i];

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Asked: 2015-06-04 05:57:46 -0600

Seen: 290 times

Last updated: Jun 07 '15