IssueTracker

This post is using machine translation. Sorry if it is difficult to understand.

Problem you have encountered:

I am using "DOCUMENT_TEXT_DETECTION".
If the "builtin/stable" model is changed to the "builtin/latest" model released on December 5, the recognition accuracy of Japanese may decrease.
Even if "ja" is specified for languageHints, hiragana and half-width katakana are sometimes recognized as kanji and the languageCode is sometimes "zh".
In "builtin/stable", setting languageHints changes the response, but in "builtin/latest", setting languageHints does not change the response.
Is the setting by languageHints not working?

This is the result of testing with "Try this method" in the Documentation Guide.
"2024年(令和06年)06月01日まで有効" is incorrectly recognized as "2024年(令和06年)06月01日下有効".

Request:

{
  "requests": [
    {
      "features": [
        {
          "type": "DOCUMENT_TEXT_DETECTION",
          "model": "builtin/latest"
        }
      ],
      "image": {
        "source": {
          "imageUri": "https://www.npa.go.jp/policies/application/license_renewal/img/license.jpg"
        }
      },
      "imageContext": {
        "languageHints": [
          "ja"
        ]
      }
    }
  ]
}

Response (excerpt):

{
  "responses": [
    {
      "textAnnotations": [
        {
          "locale": "ja",

        ........

        "text": "氏名 日 本花子\n昭和61年5月1日生\n住所 東京都千代田区霞が関2-1-2\n交付 令和 01 年 05月07日 12345\n2024年(令和06年)06月01日下有効\n免許の\n条件等\n「優良\n眼鏡等\n見本\n| 番号 | 第 012345678900号\n二小医 平成15年04月01日\n他 平成17年06月01日\n三種平成29年08月01日\n種\n|大型小特\n類\n大特普二\n二中二\n大二\n原大中\n大自二大特二\n普自引引\n運転免許証\n00000\nK\n会〇\n公安委員会"
      }
    }
  ]
}