ALPR on Bitmap objects on Android machines

[Navin Jethani]

Hello

We load JPEG files into Bitmap files using BitmapFactory.decodeFile

We copy the bitmap pixel to a buffer.

bitmap.copyPixelsToBuffer(buffer);

Then, UltAlprSdkEngine.process is called with the following parameters.

final UltAlprSdkResult result = UltAlprSdkEngine.process(
ULTALPR_SDK_IMAGE_TYPE.ULTALPR_SDK_IMAGE_TYPE_RGBA32,
buffer,
bitmap.getWidth(),
bitmap.getHeight()

);

07-03 15:14:41.458 E/org.doubango.compv(25630): ***[COMPV ERROR]: function: "UltimateBaseDebugPrint()"
07-03 15:14:41.458 E/org.doubango.compv(25630): file: "../../../../ultimateBase/lib/include\ultimate_base_debug.h"
07-03 15:14:41.458 E/org.doubango.compv(25630): line: "50"
07-03 15:14:41.458 E/org.doubango.compv(25630): message: [UltAlprSdkEngine]Invalid parameters

Any help on what could be going wrong?

Regards

Navin

[MAMADOU DIOP]

Hi,

You *must* use a Direct buffer. Read https://javarevisited.blogspot.com/2015/08/difference-between-direct-non-direct-mapped-bytebuffer-nio-java.html

Use code at https://github.com/DoubangoTelecom/ultimateALPR-SDK/blob/8130c76140fe8edc60fe20f875796121a8d22fed/samples/android/benchmark/src/main/java/org/doubango/ultimateAlpr/AlprBenchmarkActivity.java#L461 as reference

Most importantly, always share your full code and full logs, *do not cut them*

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[MAMADOU DIOP]

the important line to create the direct buffer is at https://github.com/DoubangoTelecom/ultimateALPR-SDK/blob/8130c76140fe8edc60fe20f875796121a8d22fed/samples/android/benchmark/src/main/java/org/doubango/ultimateAlpr/AlprBenchmarkActivity.java#L480

To view this discussion on the web visit https://groups.google.com/d/msgid/doubango-ai/8131ca3a-2cd3-4085-a4db-749805d5224b%40doubango.org.