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[英]How to set a whitelist and blacklist in chrome with Android Management API
[英]blacklist and whitelist in tesseract ANDROID
我正在开发一个Android应用程序,通过电话的相机或从画廊拍照卡来为信用卡充值。我使用tesseract库为此目的只使用黑名单和白名单的数字..它不能按预期工作
我使用的图片仅包含这两行:
PIN码
41722757649786
开始充电活动之前的结果是:
718 200
41722757649786
我想只识别没有字母的数字而不使用cropper ..
public void initTess(){
if (mBaseApi != null)
mBaseApi.end();
mBaseApi = new TessBaseAPI();
mBaseApi.setDebug(false);
mBaseApi.setPageSegMode(TessBaseAPI.PageSegMode.PSM_OSD_ONLY);
mBaseApi.init(mDataDir + File.separator,"eng");
mBaseApi.setVariable(TessBaseAPI.VAR_CHAR_WHITELIST,"0123456789");
mBaseApi.setVariable(TessBaseAPI.VAR_CHAR_BLACKLIST,"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmopqrstuvwxyz");
}
设置"tessedit_char_whitelist"
变量必须在初始化之前完成,如FAQ中所述: https : //code.google.com/p/tesseract-ocr/wiki/FAQ#How_do_I_recognize_only_digits ? 这很可能也适用于黑名单。
因此,从以下更改您的代码:
mBaseApi.setPageSegMode(TessBaseAPI.PageSegMode.PSM_OSD_ONLY);
mBaseApi.init(mDataDir + File.separator,"eng");
mBaseApi.setVariable(TessBaseAPI.VAR_CHAR_WHITELIST,"0123456789");
mBaseApi.setVariable(TessBaseAPI.VAR_CHAR_BLACKLIST,"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmopqrstuvwxyz");
对此:
mBaseApi.setPageSegMode(TessBaseAPI.PageSegMode.PSM_OSD_ONLY);
mBaseApi.setVariable(TessBaseAPI.VAR_CHAR_WHITELIST,"0123456789");
mBaseApi.setVariable(TessBaseAPI.VAR_CHAR_BLACKLIST,"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmopqrstuvwxyz");
mBaseApi.init(mDataDir + File.separator,"eng");
应该做的伎俩。
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