Here’s some C code that shows how to read an opencv cv::Mat image using the barcode reader toolkit. The main points to note are:<\/p>\n
#include <barcode.h>
\n#include <iostream>
\n#include <opencv2\/core\/core.hpp>
\n#include <opencv2\/highgui\/highgui.hpp>
\n#include <opencv2\/imgproc\/imgproc.hpp><\/p>\n
static void convertBitmapData(unsigned char *in, BITMAP *pBm)
\n{
\nint y ;
\nunsigned char *out;<\/p>\n
out = (unsigned char *) pBm->bmBits + (pBm->bmWidthBytes * pBm->bmHeight);<\/p>\n
for (y = 0; y < pBm->bmHeight; y++)
\n{
\nout -= pBm->bmWidthBytes;
\nmemcpy(out, in, pBm->bmWidth);
\nin += pBm->bmWidth;
\n}<\/p>\n
}<\/p>\n
main()
\n{
\nint i ;
\nint n ;
\nBITMAP bm ;
\nchar **bar_codes ;
\nchar **bar_codes_type ;
\nvoid *hBarcode ;<\/p>\n
cv::Mat img = cv::imread(“somefile.tif”, cv::IMREAD_GRAYSCALE);<\/p>\n
bm.bmWidth = img.size().width;
\nbm.bmHeight = img.size().height;
\nbm.bmBitsPixel = 8; \/\/ from IMREAD_GRAYSCALE
\nbm.bmWidthBytes = bm.bmWidth ;
\nif (bm.bmWidthBytes % 4) bm.bmWidthBytes += 4 – (bm.bmWidthBytes % 4); \/\/ Pad to 4 byte boundary
\nbm.bmPlanes = 1;
\nbm.bmType = 1;
\nbm.bmBits = (void *) malloc (bm.bmWidthBytes * bm.bmHeight);<\/p>\n
convertBitmapData((unsigned char *) img.data, &bm);<\/p>\n
hBarcode = STCreateBarCodeSession() ;<\/p>\n
n = STReadBarCodeFromBitmap(hBarcode, &bm, (float) 200, &bar_codes, &bar_codes_type, 0) ;<\/p>\n
for (i = 0; i < n; i++)
\nstd::cout << bar_codes[i] << std::endl;
\n}<\/p>\n","protected":false},"excerpt":{"rendered":"
Here’s some C code that shows how to read an opencv cv::Mat image using the barcode reader toolkit. The main points to note are: Read the image using the cv::IMREAD_GRAYSCALE flag Flip the image vertically Align the scan lines to 4 byte boundaries #include <barcode.h> #include <iostream> #include <opencv2\/core\/core.hpp> #include <opencv2\/highgui\/highgui.hpp> #include <opencv2\/imgproc\/imgproc.hpp> static void … <\/p>\n","protected":false},"author":1,"featured_media":324,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[236,18,203,31],"tags":[],"class_list":["post-2557","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-documentation-for-our-toolkits-and-applications","category-knowledge-base","category-news","category-software-development-kits"],"_links":{"self":[{"href":"https:\/\/www.bardecode.com\/newsite\/wp-json\/wp\/v2\/posts\/2557"}],"collection":[{"href":"https:\/\/www.bardecode.com\/newsite\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bardecode.com\/newsite\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bardecode.com\/newsite\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bardecode.com\/newsite\/wp-json\/wp\/v2\/comments?post=2557"}],"version-history":[{"count":5,"href":"https:\/\/www.bardecode.com\/newsite\/wp-json\/wp\/v2\/posts\/2557\/revisions"}],"predecessor-version":[{"id":2562,"href":"https:\/\/www.bardecode.com\/newsite\/wp-json\/wp\/v2\/posts\/2557\/revisions\/2562"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bardecode.com\/newsite\/wp-json\/wp\/v2\/media\/324"}],"wp:attachment":[{"href":"https:\/\/www.bardecode.com\/newsite\/wp-json\/wp\/v2\/media?parent=2557"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bardecode.com\/newsite\/wp-json\/wp\/v2\/categories?post=2557"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bardecode.com\/newsite\/wp-json\/wp\/v2\/tags?post=2557"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}