Vue2.0实现调用摄像头进行拍照功能 exif.js实现图片上传功能

本文实例为大家分享了Vue2.0实现调用摄像头进行拍照功能的具体代码，以及图片上传功能引用exif.js，供大家参考，具体内容如下

可以在github 上下载demo链接

vue组件代码

引用的exif.js代码

(function() {

  var debug = false;

  var root = this;

  var EXIF = function(obj) {
    if (obj instanceof EXIF) return obj;
    if (!(this instanceof EXIF)) return new EXIF(obj);
    this.EXIFwrapped = obj;
  };

  if (typeof exports !== 'undefined') {
    if (typeof module !== 'undefined' && module.exports) {
      exports = module.exports = EXIF;
    }
    exports.EXIF = EXIF;
  } else {
    root.EXIF = EXIF;
  }

  var ExifTags = EXIF.Tags = {

    // version tags
    0x9000 : "ExifVersion",       // EXIF version
    0xA000 : "FlashpixVersion",     // Flashpix format version

    // colorspace tags
    0xA001 : "ColorSpace",       // Color space information tag

    // image configuration
    0xA002 : "PixelXDimension",     // Valid width of meaningful image
    0xA003 : "PixelYDimension",     // Valid height of meaningful image
    0x9101 : "ComponentsConfiguration", // Information about channels
    0x9102 : "CompressedBitsPerPixel", // Compressed bits per pixel

    // user information
    0x927C : "MakerNote",        // Any desired information written by the manufacturer
    0x9286 : "UserComment",       // Comments by user

    // related file
    0xA004 : "RelatedSoundFile",    // Name of related sound file

    // date and time
    0x9003 : "DateTimeOriginal",    // Date and time when the original image was generated
    0x9004 : "DateTimeDigitized",    // Date and time when the image was stored digitally
    0x9290 : "SubsecTime",       // Fractions of seconds for DateTime
    0x9291 : "SubsecTimeOriginal",   // Fractions of seconds for DateTimeOriginal
    0x9292 : "SubsecTimeDigitized",   // Fractions of seconds for DateTimeDigitized

    // picture-taking conditions
    0x829A : "ExposureTime",      // Exposure time (in seconds)
    0x829D : "FNumber",         // F number
    0x8822 : "ExposureProgram",     // Exposure program
    0x8824 : "SpectralSensitivity",   // Spectral sensitivity
    0x8827 : "ISOSpeedRatings",     // ISO speed rating
    0x8828 : "OECF",          // Optoelectric conversion factor
    0x9201 : "ShutterSpeedValue",    // Shutter speed
    0x9202 : "ApertureValue",      // Lens aperture
    0x9203 : "BrightnessValue",     // Value of brightness
    0x9204 : "ExposureBias",      // Exposure bias
    0x9205 : "MaxApertureValue",    // Smallest F number of lens
    0x9206 : "SubjectDistance",     // Distance to subject in meters
    0x9207 : "MeteringMode",      // Metering mode
    0x9208 : "LightSource",       // Kind of light source
    0x9209 : "Flash",          // Flash status
    0x9214 : "SubjectArea",       // Location and area of main subject
    0x920A : "FocalLength",       // Focal length of the lens in mm
    0xA20B : "FlashEnergy",       // Strobe energy in BCPS
    0xA20C : "SpatialFrequencyResponse",  //
    0xA20E : "FocalPlaneXResolution",  // Number of pixels in width direction per FocalPlaneResolutionUnit
    0xA20F : "FocalPlaneYResolution",  // Number of pixels in height direction per FocalPlaneResolutionUnit
    0xA210 : "FocalPlaneResolutionUnit",  // Unit for measuring FocalPlaneXResolution and FocalPlaneYResolution
    0xA214 : "SubjectLocation",     // Location of subject in image
    0xA215 : "ExposureIndex",      // Exposure index selected on camera
    0xA217 : "SensingMethod",      // Image sensor type
    0xA300 : "FileSource",       // Image source (3 == DSC)
    0xA301 : "SceneType",        // Scene type (1 == directly photographed)
    0xA302 : "CFAPattern",       // Color filter array geometric pattern
    0xA401 : "CustomRendered",     // Special processing
    0xA402 : "ExposureMode",      // Exposure mode
    0xA403 : "WhiteBalance",      // 1 = auto white balance, 2 = manual
    0xA404 : "DigitalZoomRation",    // Digital zoom ratio
    0xA405 : "FocalLengthIn35mmFilm",  // Equivalent foacl length assuming 35mm film camera (in mm)
    0xA406 : "SceneCaptureType",    // Type of scene
    0xA407 : "GainControl",       // Degree of overall image gain adjustment
    0xA408 : "Contrast",        // Direction of contrast processing applied by camera
    0xA409 : "Saturation",       // Direction of saturation processing applied by camera
    0xA40A : "Sharpness",        // Direction of sharpness processing applied by camera
    0xA40B : "DeviceSettingDescription",  //
    0xA40C : "SubjectDistanceRange",  // Distance to subject

    // other tags
    0xA005 : "InteroperabilityIFDPointer",
    0xA420 : "ImageUniqueID"      // Identifier assigned uniquely to each image
  };

  var TiffTags = EXIF.TiffTags = {
    0x0100 : "ImageWidth",
    0x0101 : "ImageHeight",
    0x8769 : "ExifIFDPointer",
    0x8825 : "GPSInfoIFDPointer",
    0xA005 : "InteroperabilityIFDPointer",
    0x0102 : "BitsPerSample",
    0x0103 : "Compression",
    0x0106 : "PhotometricInterpretation",
    0x0112 : "Orientation",
    0x0115 : "SamplesPerPixel",
    0x011C : "PlanarConfiguration",
    0x0212 : "YCbCrSubSampling",
    0x0213 : "YCbCrPositioning",
    0x011A : "XResolution",
    0x011B : "YResolution",
    0x0128 : "ResolutionUnit",
    0x0111 : "StripOffsets",
    0x0116 : "RowsPerStrip",
    0x0117 : "StripByteCounts",
    0x0201 : "JPEGInterchangeFormat",
    0x0202 : "JPEGInterchangeFormatLength",
    0x012D : "TransferFunction",
    0x013E : "WhitePoint",
    0x013F : "PrimaryChromaticities",
    0x0211 : "YCbCrCoefficients",
    0x0214 : "ReferenceBlackWhite",
    0x0132 : "DateTime",
    0x010E : "ImageDescription",
    0x010F : "Make",
    0x0110 : "Model",
    0x0131 : "Software",
    0x013B : "Artist",
    0x8298 : "Copyright"
  };

  var GPSTags = EXIF.GPSTags = {
    0x0000 : "GPSVersionID",
    0x0001 : "GPSLatitudeRef",
    0x0002 : "GPSLatitude",
    0x0003 : "GPSLongitudeRef",
    0x0004 : "GPSLongitude",
    0x0005 : "GPSAltitudeRef",
    0x0006 : "GPSAltitude",
    0x0007 : "GPSTimeStamp",
    0x0008 : "GPSSatellites",
    0x0009 : "GPSStatus",
    0x000A : "GPSMeasureMode",
    0x000B : "GPSDOP",
    0x000C : "GPSSpeedRef",
    0x000D : "GPSSpeed",
    0x000E : "GPSTrackRef",
    0x000F : "GPSTrack",
    0x0010 : "GPSImgDirectionRef",
    0x0011 : "GPSImgDirection",
    0x0012 : "GPSMapDatum",
    0x0013 : "GPSDestLatitudeRef",
    0x0014 : "GPSDestLatitude",
    0x0015 : "GPSDestLongitudeRef",
    0x0016 : "GPSDestLongitude",
    0x0017 : "GPSDestBearingRef",
    0x0018 : "GPSDestBearing",
    0x0019 : "GPSDestDistanceRef",
    0x001A : "GPSDestDistance",
    0x001B : "GPSProcessingMethod",
    0x001C : "GPSAreaInformation",
    0x001D : "GPSDateStamp",
    0x001E : "GPSDifferential"
  };

  var StringValues = EXIF.StringValues = {
    ExposureProgram : {
      0 : "Not defined",
      1 : "Manual",
      2 : "Normal program",
      3 : "Aperture priority",
      4 : "Shutter priority",
      5 : "Creative program",
      6 : "Action program",
      7 : "Portrait mode",
      8 : "Landscape mode"
    },
    MeteringMode : {
      0 : "Unknown",
      1 : "Average",
      2 : "CenterWeightedAverage",
      3 : "Spot",
      4 : "MultiSpot",
      5 : "Pattern",
      6 : "Partial",
      255 : "Other"
    },
    LightSource : {
      0 : "Unknown",
      1 : "Daylight",
      2 : "Fluorescent",
      3 : "Tungsten (incandescent light)",
      4 : "Flash",
      9 : "Fine weather",
      10 : "Cloudy weather",
      11 : "Shade",
      12 : "Daylight fluorescent (D 5700 - 7100K)",
      13 : "Day white fluorescent (N 4600 - 5400K)",
      14 : "Cool white fluorescent (W 3900 - 4500K)",
      15 : "White fluorescent (WW 3200 - 3700K)",
      17 : "Standard light A",
      18 : "Standard light B",
      19 : "Standard light C",
      20 : "D55",
      21 : "D65",
      22 : "D75",
      23 : "D50",
      24 : "ISO studio tungsten",
      255 : "Other"
    },
    Flash : {
      0x0000 : "Flash did not fire",
      0x0001 : "Flash fired",
      0x0005 : "Strobe return light not detected",
      0x0007 : "Strobe return light detected",
      0x0009 : "Flash fired, compulsory flash mode",
      0x000D : "Flash fired, compulsory flash mode, return light not detected",
      0x000F : "Flash fired, compulsory flash mode, return light detected",
      0x0010 : "Flash did not fire, compulsory flash mode",
      0x0018 : "Flash did not fire, auto mode",
      0x0019 : "Flash fired, auto mode",
      0x001D : "Flash fired, auto mode, return light not detected",
      0x001F : "Flash fired, auto mode, return light detected",
      0x0020 : "No flash function",
      0x0041 : "Flash fired, red-eye reduction mode",
      0x0045 : "Flash fired, red-eye reduction mode, return light not detected",
      0x0047 : "Flash fired, red-eye reduction mode, return light detected",
      0x0049 : "Flash fired, compulsory flash mode, red-eye reduction mode",
      0x004D : "Flash fired, compulsory flash mode, red-eye reduction mode, return light not detected",
      0x004F : "Flash fired, compulsory flash mode, red-eye reduction mode, return light detected",
      0x0059 : "Flash fired, auto mode, red-eye reduction mode",
      0x005D : "Flash fired, auto mode, return light not detected, red-eye reduction mode",
      0x005F : "Flash fired, auto mode, return light detected, red-eye reduction mode"
    },
    SensingMethod : {
      1 : "Not defined",
      2 : "One-chip color area sensor",
      3 : "Two-chip color area sensor",
      4 : "Three-chip color area sensor",
      5 : "Color sequential area sensor",
      7 : "Trilinear sensor",
      8 : "Color sequential linear sensor"
    },
    SceneCaptureType : {
      0 : "Standard",
      1 : "Landscape",
      2 : "Portrait",
      3 : "Night scene"
    },
    SceneType : {
      1 : "Directly photographed"
    },
    CustomRendered : {
      0 : "Normal process",
      1 : "Custom process"
    },
    WhiteBalance : {
      0 : "Auto white balance",
      1 : "Manual white balance"
    },
    GainControl : {
      0 : "None",
      1 : "Low gain up",
      2 : "High gain up",
      3 : "Low gain down",
      4 : "High gain down"
    },
    Contrast : {
      0 : "Normal",
      1 : "Soft",
      2 : "Hard"
    },
    Saturation : {
      0 : "Normal",
      1 : "Low saturation",
      2 : "High saturation"
    },
    Sharpness : {
      0 : "Normal",
      1 : "Soft",
      2 : "Hard"
    },
    SubjectDistanceRange : {
      0 : "Unknown",
      1 : "Macro",
      2 : "Close view",
      3 : "Distant view"
    },
    FileSource : {
      3 : "DSC"
    },

    Components : {
      0 : "",
      1 : "Y",
      2 : "Cb",
      3 : "Cr",
      4 : "R",
      5 : "G",
      6 : "B"
    }
  };

  function addEvent(element, event, handler) {
    if (element.addEventListener) {
      element.addEventListener(event, handler, false);
    } else if (element.attachEvent) {
      element.attachEvent("on" + event, handler);
    }
  }

  function imageHasData(img) {
    return !!(img.exifdata);
  }


  function base64ToArrayBuffer(base64, contentType) {
    contentType = contentType || base64.match(/^data\:([^\;]+)\;base64,/mi)[1] || ''; // e.g. 'data:image/jpeg;base64,...' => 'image/jpeg'
    base64 = base64.replace(/^data\:([^\;]+)\;base64,/gmi, '');
    var binary = atob(base64);
    var len = binary.length;
    var buffer = new ArrayBuffer(len);
    var view = new Uint8Array(buffer);
    for (var i = 0; i < len; i++) {
      view[i] = binary.charCodeAt(i);
    }
    return buffer;
  }

  function objectURLToBlob(url, callback) {
    var http = new XMLHttpRequest();
    http.open("GET", url, true);
    http.responseType = "blob";
    http.onload = function(e) {
      if (this.status == 200 || this.status === 0) {
        callback(this.response);
      }
    };
    http.send();
  }

  function getImageData(img, callback) {
    function handleBinaryFile(binFile) {
      var data = findEXIFinJPEG(binFile);
      var iptcdata = findIPTCinJPEG(binFile);
      img.exifdata = data || {};
      img.iptcdata = iptcdata || {};
      if (callback) {
        callback.call(img);
      }
    }

    if (img.src) {
      if (/^data\:/i.test(img.src)) { // Data URI
        var arrayBuffer = base64ToArrayBuffer(img.src);
        handleBinaryFile(arrayBuffer);

      } else if (/^blob\:/i.test(img.src)) { // Object URL
        var fileReader = new FileReader();
        fileReader.onload = function(e) {
          handleBinaryFile(e.target.result);
        };
        objectURLToBlob(img.src, function (blob) {
          fileReader.readAsArrayBuffer(blob);
        });
      } else {
        var http = new XMLHttpRequest();
        http.onload = function() {
          if (this.status == 200 || this.status === 0) {
            handleBinaryFile(http.response);
          } else {
            throw "Could not load image";
          }
          http = null;
        };
        http.open("GET", img.src, true);
        http.responseType = "arraybuffer";
        http.send(null);
      }
    } else if (window.FileReader && (img instanceof window.Blob || img instanceof window.File)) {
      var fileReader = new FileReader();
      fileReader.onload = function(e) {
        if (debug) console.log("Got file of length " + e.target.result.byteLength);
        handleBinaryFile(e.target.result);
      };

      fileReader.readAsArrayBuffer(img);
    }
  }

  function findEXIFinJPEG(file) {
    var dataView = new DataView(file);

    if (debug) console.log("Got file of length " + file.byteLength);
    if ((dataView.getUint8(0) != 0xFF) || (dataView.getUint8(1) != 0xD8)) {
      if (debug) console.log("Not a valid JPEG");
      return false; // not a valid jpeg
    }

    var offset = 2,
      length = file.byteLength,
      marker;

    while (offset < length) {
      if (dataView.getUint8(offset) != 0xFF) {
        if (debug) console.log("Not a valid marker at offset " + offset + ", found: " + dataView.getUint8(offset));
        return false; // not a valid marker, something is wrong
      }

      marker = dataView.getUint8(offset + 1);
      if (debug) console.log(marker);

      // we could implement handling for other markers here,
      // but we're only looking for 0xFFE1 for EXIF data

      if (marker == 225) {
        if (debug) console.log("Found 0xFFE1 marker");

        return readEXIFData(dataView, offset + 4, dataView.getUint16(offset + 2) - 2);

        // offset += 2 + file.getShortAt(offset+2, true);

      } else {
        offset += 2 + dataView.getUint16(offset+2);
      }

    }

  }

  function findIPTCinJPEG(file) {
    var dataView = new DataView(file);

    if (debug) console.log("Got file of length " + file.byteLength);
    if ((dataView.getUint8(0) != 0xFF) || (dataView.getUint8(1) != 0xD8)) {
      if (debug) console.log("Not a valid JPEG");
      return false; // not a valid jpeg
    }

    var offset = 2,
      length = file.byteLength;


    var isFieldSegmentStart = function(dataView, offset){
      return (
        dataView.getUint8(offset) === 0x38 &&
        dataView.getUint8(offset+1) === 0x42 &&
        dataView.getUint8(offset+2) === 0x49 &&
        dataView.getUint8(offset+3) === 0x4D &&
        dataView.getUint8(offset+4) === 0x04 &&
        dataView.getUint8(offset+5) === 0x04
      );
    };

    while (offset < length) {

      if ( isFieldSegmentStart(dataView, offset )){

        // Get the length of the name header (which is padded to an even number of bytes)
        var nameHeaderLength = dataView.getUint8(offset+7);
        if(nameHeaderLength % 2 !== 0) nameHeaderLength += 1;
        // Check for pre photoshop 6 format
        if(nameHeaderLength === 0) {
          // Always 4
          nameHeaderLength = 4;
        }

        var startOffset = offset + 8 + nameHeaderLength;
        var sectionLength = dataView.getUint16(offset + 6 + nameHeaderLength);

        return readIPTCData(file, startOffset, sectionLength);

        break;

      }


      // Not the marker, continue searching
      offset++;

    }

  }
  var IptcFieldMap = {
    0x78 : 'caption',
    0x6E : 'credit',
    0x19 : 'keywords',
    0x37 : 'dateCreated',
    0x50 : 'byline',
    0x55 : 'bylineTitle',
    0x7A : 'captionWriter',
    0x69 : 'headline',
    0x74 : 'copyright',
    0x0F : 'category'
  };
  function readIPTCData(file, startOffset, sectionLength){
    var dataView = new DataView(file);
    var data = {};
    var fieldValue, fieldName, dataSize, segmentType, segmentSize;
    var segmentStartPos = startOffset;
    while(segmentStartPos < startOffset+sectionLength) {
      if(dataView.getUint8(segmentStartPos) === 0x1C && dataView.getUint8(segmentStartPos+1) === 0x02){
        segmentType = dataView.getUint8(segmentStartPos+2);
        if(segmentType in IptcFieldMap) {
          dataSize = dataView.getInt16(segmentStartPos+3);
          segmentSize = dataSize + 5;
          fieldName = IptcFieldMap[segmentType];
          fieldValue = getStringFromDB(dataView, segmentStartPos+5, dataSize);
          // Check if we already stored a value with this name
          if(data.hasOwnProperty(fieldName)) {
            // Value already stored with this name, create multivalue field
            if(data[fieldName] instanceof Array) {
              data[fieldName].push(fieldValue);
            }
            else {
              data[fieldName] = [data[fieldName], fieldValue];
            }
          }
          else {
            data[fieldName] = fieldValue;
          }
        }

      }
      segmentStartPos++;
    }
    return data;
  }



  function readTags(file, tiffStart, dirStart, strings, bigEnd) {
    var entries = file.getUint16(dirStart, !bigEnd),
      tags = {},
      entryOffset, tag,
      i;

    for (i=0;i 4 ? valueOffset : (entryOffset + 8);
          vals = [];
          for (n=0;n 4 ? valueOffset : (entryOffset + 8);
        return getStringFromDB(file, offset, numValues-1);

      case 3: // short, 16 bit int
        if (numValues == 1) {
          return file.getUint16(entryOffset + 8, !bigEnd);
        } else {
          offset = numValues > 2 ? valueOffset : (entryOffset + 8);
          vals = [];
          for (n=0;n 
 

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。