我正在使用Tesseract并在我的项目中启用OpenCL选项。执行GetUTF8Text()方法时,我收到以下错误:
DS] Profile read from file (tesseract_opencl_profile_devices.dat).
[DS] Device[1] 1:Intel(R) Core(TM) i5-4250U CPU @ 1.30GHz score is 14049349632.000000
[DS] Device[2] 1:HD Graphics 5000 score is 14049349632.000000
[DS] Device[3] 0:(null) score is 21474836480.000000
[DS] Selected Device[1]: "Intel(R) Core(TM) i5-4250U CPU @ 1.30GHz" (OpenCL)
OpenCL error code is -54 at when clEnqueueNDRangeKernel kernel_HistogramRectAllChannels .
OpenCL error code is -54 at when clEnqueueNDRangeKernel kernel_HistogramRectAllChannelsReduction .
OpenCL error code is -54 at when clEnqueueNDRangeKernel kernel_ThresholdRectToPix .
OpenCL error code is -54 at when clEnqueueNDRangeKernel kernel_HistogramRectAllChannels .
OpenCL error code is -54 at when clEnqueueNDRangeKernel kernel_HistogramRectAllChannelsReduction .
使用的库版本:
tesseract 3.04.00
leptonica-1.71
zlib 1.2.5
OpenCL info:
Found 1 platforms.
Platform name: Apple.
Version: OpenCL 1.2 (Dec 14 2014 22:29:47).
Found 2 devices.
Device 1 name: Intel(R) Core(TM) i5-4250U CPU @ 1.30GHz.
Device 2 name: HD Graphics 5000.
以前有人遇到过这个问题吗?
答案 0 :(得分:1)
看起来Tessaract将工作组大小16x16
的内核排队,这是用于GPU上图像处理的相当典型的图块大小。但是,Apple的CPU的OpenCL实现有一个限制,即工作组大小只能是一维的(即第二个维度必须为1),因此该工作组大小将无效。您获得的错误代码(-54
)对应于CL_INVALID_WORK_GROUP_SIZE
。
如果你可以让Tesseract在GPU上运行(HD Graphics 5000),你应该没问题。