小程序获取OCR识别结果，示例代码

//获取OCR识别结果，示例代码--start
				wx.chooseMedia({
				  count: 1,
				  mediaType: ['image'],
				  sourceType: ['album', 'camera'],
				  maxDuration: 30,
				  camera: 'back',
				  success: (res) => {
					if(res.errMsg=="chooseMedia:ok"){
						let tempImgPath = res.tempFiles[0].tempFilePath;
						// const imgBase64 = uni.getFileSystemManager().readFileSync(tempImgPath, "base64");
						wx.serviceMarket.invokeService({
						  service: 'wx79ac3de8be320b71', // '固定为服务商OCR的appid，非小程序appid',
						  api: 'OcrAllInOne',//服务名称
						  data: {
							img_url: new wx.serviceMarket.CDN({
								type: 'filePath',
								filePath: tempImgPath// 使用选择的第一张图片的路径
							}),
							data_type: 3,//1：二进制；2：base64字符串；3：图片url
							ocr_type: 1,//1：身份证；2：银行卡；3：行驶证；4：驾驶证；7：营业执照；8：通用OCR ; 10: 车牌识别
						  },
						}).then(res => {
						  console.log('invokeService success', res)
						 //res 成功返回正面示例报文：{"errMsg":"invokeService:ok","data":{"idcard_res":{"type":0,"name":{"text":"崔效伟"},"gender":{"text":"男"},"nationality":{"text":"汉"},"birth":{"text":"2000-03-10"},"address":{"text":"山西省忻州市忻府区解原乡东社村029号"},"id":{"text":"142201200003104873"},"card_position":{"pos":{"left_top":{"x":503.8359375,"y":0},"right_top":{"x":503.8359375,"y":776},"right_bottom":{"x":6.0703125,"y":776},"left_bottom":{"x":6.0703125,"y":0}}},"image_width":516,"image_height":777,"card_property":4}},"requestId":"MLzHwxChFkPT-6Yqi_YFXN3exxf6uL9wYiaRFKet9xeqaM6da2lzO3HF4vsI-j8RxbQ"};
						 //  wx.showModal({
							// title: 'cost',
							// content: (Date.now() - d) + ''
						 //  })
						}).catch(err => {
						  console.error('invokeService fail', err)
						 //  wx.showModal({
							// title: 'fail',
							// content: err + '',
						 //  })
						})
					}else{
						uni.showToast({
							title: res.errMsg,
							icon: "none",
							position: 'center',
							duration: 3000
						});
					}
				  },fail: (res) => {
				  	console.log("选择身份证照片失败："+res.errMsg);
				  }
				});
				//获取OCR识别结果，示例代码--end

　　 参考地址：https://blog.csdn.net/weixin_36754290/article/details/151318521