Code samples for image processing
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Quality, size, speed
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Size, quality, speed
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Speed
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Quality, size, speed
Size, quality, speed
Speed
// load image as data stream
kRecLoadImgDataStreamF(sid, jpgfile, &hPage, 0);
// save image into FF_PDF format – preserving compression quality and size
kRecSaveImgF(sid, outpdf, FF_PDF, hPage, II_ORIGINAL, false);// load image as data stream
kRecLoadImgDataStreamF(sid, jpgfile, &hPage, 0);
kRecDecompressImgDataStream(sid, hPage); // decompress DataStream only for preprocessing
kRecPreprocessImg(sid, hPage); // perform the necessary transformations
// save image into FF_PDF format - still the DataStream will be saved but with transformations!
kRecSaveImgF(sid, outpdf, FF_PDF, hPage, II_CURRENT, false);kRecSetDTXTFormat(sid, DTXT_IOTPDF);
// load image as data stream
kRecLoadImgDataStreamF(sid, jpgfile, &hPage, 0);
// decompress DataStream only for internal processing
kRecDecompressImgDataStream(sid, hPage);
kRecPreprocessImg(sid, hPage);
kRecRecognize(sid, hPage, NULL);
// create searchable PDF preserving compression quality, with readable orientation (II_CURRENT)
kRecConvert2DTXTEx(sid, &hPage, 1, II_CURRENT, outpdf); // use II_ORIGINAL for original orientationFF_JPG/JPG2K
FF_PDF/PDF_MRC
DTXT_IOTPDF/IOTPDF_MRC
kRecSetCompressionLevel(sid, 1); // Level 1
kRecSetCompressionTradeoff(sid, COMPRESSION_ADVANCED);FF_JPG/JPG2K
FF_PDF/PDF_MRC
DTXT_IOTPDF/IOTPDF_MRC
kRecSetCompressionTradeoff(sid, COMPRESSION_FAST);If quality is more important than file size, set kRecSetCompressionLevel(sid, 5); // Level 4-5
If file size is more important than quality, set kRecSetCompressionLevel(sid, 1); // Level 1-2
For DTXT_IOTPDF_MRC, set Kernel.OcrMgr.Images.KeepOcrImage = TRUE