It's possible that your pixel data does not match the properties set by dmtxImageCreate() and dmtxImageSetProp(). Why does my call to dmtxRegionFindNext() always return NULL? 1.2 What can I do to improve performance? 2. If your image is cropped so the Data Matrix symbol is touching or nearly touching the image boundary, this might be preventing a successful scan. The Data Matrix standard, and therefore libdmtx, requires a "quiet zone" to surround every barcode region. Image quality (noisy, blurry, low contrast, etc…).Check if any of the following situations apply: One (or several) known conditions may be conspiring against you to prevent a successful scan. Data Matrix Scanning Questions 1.1 Why won't my image scan? How do I join the libdmtx mailing lists?Ĩ. How do I fix the following MS Visual Studio error when compiling?ħ.1. Do I need to build ImageMagick from source?ĥ.3. Why does dmtxread print out Ghostscript warnings?ĥ.2. dmtxwrite just write-bombed my terminal with binary data. ![]() Why does dmtxread / dmtxwrite just hang when I run it without parameters?Ĥ.2. Command Line Utility Questions (dmtxread / dmtxwrite)Ĥ.1. Why does my call to dmtxRegionFindNext() always return NULL?Ĥ. 1.2 What can I do to improve performance?ģ.1.
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