tencent cloud

Feedback

QR Code Recognition

Last updated: 2022-07-28 16:28:08

    Overview

    This document provides an overview of APIs and SDK code samples for image QR codes.

    API Description
    QR code recognition Recognizes the location and content of valid QR codes in an image, outputs the text information (URL or text) contained in the QR codes, and pixelates the recognized QR codes.

    QR Code Recognition

    The QR code recognition feature recognizes the location and content of valid QR codes in an image, outputs the text information (URL or text) contained in the QR codes, and pixelates the recognized QR codes.

    Recognizing during upload

    Method prototype

    cos_status_t *ci_put_object_from_file(const cos_request_options_t *options,
                                           const cos_string_t *bucket, 
                                           const cos_string_t *object, 
                                           const cos_string_t *filename,
                                           cos_table_t *headers, 
                                           cos_table_t **resp_headers,
                                           ci_operation_result_t **results)
    
    

    Feature description

    The request for recognizing QR codes during image upload is the same as that used to simply upload a file to COS, except that you need to add the image processing parameter Pic-Operations to the request header.

    Sample request

    #include "cos_http_io.h"
    #include "cos_api.h"
    #include "cos_log.h"
    #include <unistd.h>
    // `endpoint` is the COS access domain name. For more information, visit https://www.tencentcloud.com/document/product/436/6224?from_cn_redirect=1.
    static char TEST_COS_ENDPOINT[] = "cos.ap-guangzhou.myqcloud.com";
    // CI endpoint. For more information, visit https://www.tencentcloud.com/document/product/460/31066?from_cn_redirect=1.
    static char TEST_CI_ENDPOINT[] = "https://ci.ap-guangzhou.myqcloud.com";
    // A developer-owned secret ID/key used for the project. It can be obtained at https://console.tencentcloud.com/cam/capi.
    static char *TEST_ACCESS_KEY_ID;                //your secret_id
    static char *TEST_ACCESS_KEY_SECRET;            //your secret_key
    // A unique user-level resource identifier for COS access. It can be obtained at https://console.tencentcloud.com/cam/capi.
    static char TEST_APPID[] = "<APPID>";    //your appid
    // COS bucket name in the format of [bucket]-[appid], for example, `mybucket-1253666666`. It can be obtained at https://console.tencentcloud.com/cos5/bucket.
    static char TEST_BUCKET_NAME[] = "<bucketname-appid>"; 
    void log_status(cos_status_t *s)
    {
      cos_warn_log("status->code: %d", s->code);
      if (s->error_code) cos_warn_log("status->error_code: %s", s->error_code);
      if (s->error_msg) cos_warn_log("status->error_msg: %s", s->error_msg);
      if (s->req_id) cos_warn_log("status->req_id: %s", s->req_id);
    }
    void init_test_config(cos_config_t *config, int is_cname)
    {
      cos_str_set(&config->endpoint, TEST_COS_ENDPOINT);
      cos_str_set(&config->access_key_id, TEST_ACCESS_KEY_ID);
      cos_str_set(&config->access_key_secret, TEST_ACCESS_KEY_SECRET);
      cos_str_set(&config->appid, TEST_APPID);
      config->is_cname = is_cname;
    }
    void init_test_request_options(cos_request_options_t *options, int is_cname)
    {
      options->config = cos_config_create(options->pool);
      init_test_config(options->config, is_cname);
      options->ctl = cos_http_controller_create(options->pool, 0);
    }
    void test_ci_image_qrcode()
    {
      cos_pool_t *p = NULL;
      int is_cname = 0;
      cos_status_t *s = NULL;
      cos_request_options_t *options = NULL;
      cos_string_t bucket;
      cos_string_t object;
      cos_string_t file;
      cos_table_t *resp_headers;
      cos_table_t *headers = NULL;
      ci_operation_result_t *results = NULL;
      ci_qrcode_info_t *content = NULL;
       cos_pool_create(&p, NULL);
      options = cos_request_options_create(p);
      init_test_request_options(options, is_cname);
      cos_str_set(&bucket, TEST_BUCKET_NAME);
      cos_str_set(&object, "test.jpg");
      
      headers = cos_table_make(p, 1);
      apr_table_addn(headers, "pic-operations", "{\"is_pic_info\":1,\"rules\":[{\"fileid\":\"test.png\",\"rule\":\"QRcode/cover/1\"}]}");
      // Recognize during upload
      cos_str_set(&file, "test.jpg");
      cos_str_set(&object, "test.jpg");
      s = ci_put_object_from_file(options, &bucket, &object, &file, headers, &resp_headers, &results);
      log_status(s);
      if (!cos_status_is_ok(s)) {
          printf("put object failed\n");
      }
      printf("CodeStatus: %d\n", results->object.code_status);
      cos_list_for_each_entry(ci_qrcode_info_t, content, &results->object.qrcode_info, node) {
          printf("CodeUrl: %s\n", content->code_url.data);
          printf("Point: %s\n", content->point[0].data);
          printf("Point: %s\n", content->point[1].data);
          printf("Point: %s\n", content->point[2].data);
          printf("Point: %s\n", content->point[3].data);
      }
       // Terminate the memory pool
      cos_pool_destroy(p); 
    }
    int main(int argc, char *argv[])
    {
      // Get `SECRETID` and `SECRETKEY` from environment variables
      TEST_ACCESS_KEY_ID     = getenv("COS_SECRETID");
      TEST_ACCESS_KEY_SECRET = getenv("COS_SECRETKEY");
        if (cos_http_io_initialize(NULL, 0) != COSE_OK) {
         exit(1);
      }
       //set log level, default COS_LOG_WARN
      cos_log_set_level(COS_LOG_WARN);
       //set log output, default stderr
      cos_log_set_output(NULL);
       test_ci_image_qrcode();
       cos_http_io_deinitialize();
       return 0;
    }
    

    Parameter description

    Parameter Description Type
    options COS request options Struct
    bucket Bucket name in the format of BucketName-APPID String
    object Object name String
    filename Filename of the local object String
    headers COS request headers Struct
    resp_headers Returned HTTP response headers Struct
    results Processing result of the in-cloud data Struct

    Recognizing during download

    Feature description

    This feature recognizes QR codes during file download.

    Method prototype

    cos_status_t *ci_get_qrcode(const cos_request_options_t *options,
                                const cos_string_t *bucket,
                                const cos_string_t *object,
                                int cover,
                                cos_table_t *headers,
                                cos_table_t *query_params, 
                                cos_table_t **resp_headers,
                                ci_qrcode_result_t **results)
    
    

    Sample request

    #include "cos_http_io.h"
    #include "cos_api.h"
    #include "cos_log.h"
    #include <unistd.h>
    // `endpoint` is the COS access domain name. For more information, visit https://www.tencentcloud.com/document/product/436/6224?from_cn_redirect=1.
    static char TEST_COS_ENDPOINT[] = "cos.ap-guangzhou.myqcloud.com";
    // CI endpoint. For more information, visit https://www.tencentcloud.com/document/product/460/31066?from_cn_redirect=1.
    static char TEST_CI_ENDPOINT[] = "https://ci.ap-guangzhou.myqcloud.com";
    // A developer-owned secret ID/key used for the project. It can be obtained at https://console.tencentcloud.com/cam/capi.
    static char *TEST_ACCESS_KEY_ID;                //your secret_id
    static char *TEST_ACCESS_KEY_SECRET;            //your secret_key
    // A unique user-level resource identifier for COS access. It can be obtained at https://console.tencentcloud.com/cam/capi.
    static char TEST_APPID[] = "<APPID>";    //your appid
    // COS bucket name in the format of [bucket]-[appid], for example, `mybucket-1253666666`. It can be obtained at https://console.tencentcloud.com/cos5/bucket.
    static char TEST_BUCKET_NAME[] = "<bucketname-appid>"; 
    void log_status(cos_status_t *s)
    {
      cos_warn_log("status->code: %d", s->code);
      if (s->error_code) cos_warn_log("status->error_code: %s", s->error_code);
      if (s->error_msg) cos_warn_log("status->error_msg: %s", s->error_msg);
      if (s->req_id) cos_warn_log("status->req_id: %s", s->req_id);
    }
    void init_test_config(cos_config_t *config, int is_cname)
    {
      cos_str_set(&config->endpoint, TEST_COS_ENDPOINT);
      cos_str_set(&config->access_key_id, TEST_ACCESS_KEY_ID);
      cos_str_set(&config->access_key_secret, TEST_ACCESS_KEY_SECRET);
      cos_str_set(&config->appid, TEST_APPID);
      config->is_cname = is_cname;
    }
    void init_test_request_options(cos_request_options_t *options, int is_cname)
    {
      options->config = cos_config_create(options->pool);
      init_test_config(options->config, is_cname);
      options->ctl = cos_http_controller_create(options->pool, 0);
    }
    void test_ci_get_image_qrcode()
    {
      cos_pool_t *p = NULL;
      int is_cname = 0;
      cos_status_t *s = NULL;
      cos_request_options_t *options = NULL;
      cos_string_t bucket;
      cos_string_t object;
      cos_table_t *resp_headers;
      ci_qrcode_info_t *content = NULL;
      ci_qrcode_result_t *result2 = NULL;
       cos_pool_create(&p, NULL);
      options = cos_request_options_create(p);
      init_test_request_options(options, is_cname);
      cos_str_set(&bucket, TEST_BUCKET_NAME);
      cos_str_set(&object, "test.jpg");
       // Recognize during download
      s = ci_get_qrcode(options, &bucket, &object, 1, NULL, NULL, &resp_headers, &result2);
      log_status(s);
      if (!cos_status_is_ok(s)) {
          printf("get object failed\n");
      }
      printf("CodeStatus: %d\n", result2->code_status);
      cos_list_for_each_entry(ci_qrcode_info_t, content, &result2->qrcode_info, node) {
          printf("CodeUrl: %s\n", content->code_url.data);
          printf("Point: %s\n", content->point[0].data);
          printf("Point: %s\n", content->point[1].data);
          printf("Point: %s\n", content->point[2].data);
          printf("Point: %s\n", content->point[3].data);
      }
      printf("ImageResult: %s\n", result2->result_image.data);
       // Terminate the memory pool
      cos_pool_destroy(p); 
    }
    int main(int argc, char *argv[])
    {
      // Get `SECRETID` and `SECRETKEY` from environment variables
      TEST_ACCESS_KEY_ID     = getenv("COS_SECRETID");
      TEST_ACCESS_KEY_SECRET = getenv("COS_SECRETKEY");
        if (cos_http_io_initialize(NULL, 0) != COSE_OK) {
         exit(1);
      }
       //set log level, default COS_LOG_WARN
      cos_log_set_level(COS_LOG_WARN);
       //set log output, default stderr
      cos_log_set_output(NULL);
       test_ci_get_image_qrcode();
       cos_http_io_deinitialize();
       return 0;
    }
    

    Parameter description

    Parameter Description Type
    options COS request options Struct
    bucket Bucket name in the format of BucketName-APPID. The bucket name entered here must be in this format. string
    object Object name string
    cover Pixelates the recognized QR code. Valid values: 0 (no), 1 (yes). int
    headers COS request headers Struct
    query_params COS request operation parameters Struct
    resp_headers Returned HTTP response headers Struct
    results Recognized QR code Struct
    Contact Us

    Contact our sales team or business advisors to help your business.

    Technical Support

    Open a ticket if you're looking for further assistance. Our Ticket is 7x24 avaliable.

    7x24 Phone Support