232 lines
8.5 KiB
Go
232 lines
8.5 KiB
Go
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package image
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import (
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"b612.me/exif"
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exifcommon "b612.me/exif/common"
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"encoding/hex"
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"fmt"
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"os"
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)
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func Exif(path string) error {
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f, err := os.Open(path)
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if err != nil {
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return fmt.Errorf("打开文件失败 %s", path)
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}
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rawExif, err := exif.SearchAndExtractExifWithReader(f)
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f.Close()
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if err != nil {
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return fmt.Errorf("查询 EXIF 信息失败 %s: %w", path, err)
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}
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tags, _, err := exif.GetFlatExifDataUniversalSearch(rawExif, nil, true)
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if err != nil {
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return fmt.Errorf("获取 EXIF 信息失败 %s: %w", path, err)
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}
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ifd0Map := map[string]string{
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// 根 IFD (IFD0) 标签
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"IFD.Software": "生成软件名",
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"IFD.ImageWidth": "图像宽度",
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"IFD.ImageLength": "图像高度",
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"IFD.Make": "相机制造商",
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"IFD.Model": "相机型号",
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"IFD.Orientation": "图像方向",
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"IFD.YResolution": "Y轴分辨率",
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"IFD.XResolution": "X轴分辨率",
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"IFD.ResolutionUnit": "分辨率单位",
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"IFD.DateTime": "最后修改时间",
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"IFD.ImageDescription": "图像描述",
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"IFD.Artist": "图像作者",
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"IFD.Copyright": "版权信息",
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"IFD.HostComputer": "创建图像的计算机",
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"IFD.BitsPerSample": "每个颜色分量的位数",
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"IFD.Compression": "压缩方案",
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"IFD.PhotometricInterpretation": "像素组成方式",
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"IFD.StripOffsets": "图像数据条带偏移量",
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"IFD.SamplesPerPixel": "每个像素的分量数",
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"IFD.RowsPerStrip": "每个条带的行数",
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"IFD.StripByteCounts": "每个条带的字节数",
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"IFD.PlanarConfiguration": "数据排列方式",
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// Exif 子 IFD 标签
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"IFD/Exif.DateTimeOriginal": "原始拍摄时间",
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"IFD/Exif.DateTimeDigitized": "数字化时间",
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"IFD/Exif.OffsetTimeOriginal": "原始拍摄时区偏移",
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"IFD/Exif.ExposureTime": "曝光时间",
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"IFD/Exif.FNumber": "光圈F值",
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"IFD/Exif.ExposureProgram": "曝光程序",
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"IFD/Exif.ISOSpeedRatings": "ISO感光度",
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"IFD/Exif.ShutterSpeedValue": "快门速度（APEX值）",
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"IFD/Exif.ApertureValue": "光圈值（APEX值）",
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"IFD/Exif.BrightnessValue": "亮度值（APEX值）",
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"IFD/Exif.ExposureBiasValue": "曝光补偿值（EV）",
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"IFD/Exif.MeteringMode": "测光模式",
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"IFD/Exif.Flash": "闪光灯状态",
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"IFD/Exif.FocalLength": "焦距（毫米）",
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"IFD/Exif.SubjectDistance": "拍摄主体距离（米）",
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"IFD/Exif.FlashEnergy": "闪光灯强度",
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"IFD/Exif.SpatialFrequencyResponse": "空间频率响应",
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"IFD/Exif.FocalPlaneXResolution": "焦平面X分辨率",
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"IFD/Exif.FocalPlaneYResolution": "焦平面Y分辨率",
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"IFD/Exif.FocalPlaneResolutionUnit": "焦平面分辨率单位",
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"IFD/Exif.FileSource": "文件来源",
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"IFD/Exif.SceneType": "场景类型",
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"IFD/Exif.CFAPattern": "CFA（彩色滤镜阵列）模式",
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"IFD/Exif.CustomRendered": "自定义图像处理",
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"IFD/Exif.ExposureMode": "曝光模式",
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"IFD/Exif.WhiteBalance": "白平衡",
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"IFD/Exif.DigitalZoomRatio": "数码变焦比率",
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"IFD/Exif.SceneCaptureType": "场景拍摄类型",
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"IFD/Exif.GainControl": "增益控制",
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"IFD/Exif.Contrast": "对比度",
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"IFD/Exif.Saturation": "饱和度",
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"IFD/Exif.Sharpness": "锐度",
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"IFD/Exif.DeviceSettingDescription": "设备设置描述",
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"IFD/Exif.SubjectDistanceRange": "主体距离范围",
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// GPS 子 IFD 标签 (可选添加)
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"IFD/GPSInfo.GPSLatitude": "纬度",
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"IFD/GPSInfo.GPSLongitude": "经度",
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"IFD/GPSInfo.GPSAltitude": "海拔高度",
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"IFD/GPSInfo.GPSTimeStamp": "GPS时间戳",
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"IFD/GPSInfo.GPSDateStamp": "GPS日期戳",
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"IFD/GPSInfo.GPSDOP": "定位精度",
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}
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for _, tag := range tags {
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sample := "%s.%v {%#04x} [%v] ：%-10v\n"
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if name, ok := ifd0Map[tag.IfdPath+"."+tag.TagName]; ok {
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sample = "%s.%v {%#04x} [%v] (" + name + ") ：%-10v\n"
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}
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switch tag.IfdPath + "." + tag.TagName {
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case "IFD.ResolutionUnit":
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switch tag.Value.([]uint16)[0] {
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case 1:
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fmt.Printf("%s.%v {%#04x} [%v] (分辨率单位) ： 没有单位\n", tag.IfdPath, tag.TagName, tag.TagId, tag.TagTypeName)
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case 2:
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fmt.Printf("%s.%v {%#04x} [%v] (分辨率单位) ： 英寸\n", tag.IfdPath, tag.TagName, tag.TagId, tag.TagTypeName)
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case 3:
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fmt.Printf("%s.%v {%#04x} [%v] (分辨率单位) ： 像素\n", tag.IfdPath, tag.TagName, tag.TagId, tag.TagTypeName)
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default:
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fmt.Printf("%s.%v {%#04x} [%v] (分辨率单位) ： 未知单位：%v\n", tag.IfdPath, tag.TagName, tag.TagId, tag.TagTypeName, tag.Value)
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}
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case "IFD/GPSInfo.GPSLatitude", "IFD/GPSInfo.GPSLongitude":
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switch val := tag.Value.(type) {
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case []exifcommon.Rational:
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var value string
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for i, v := range val {
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switch i {
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case 0:
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value += fmt.Sprintf("%.0f°", float64(v.Numerator)/float64(v.Denominator))
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case 1:
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value += fmt.Sprintf("%.0f′", float64(v.Numerator)/float64(v.Denominator))
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case 2:
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value += fmt.Sprintf("%.3f″", float64(v.Numerator)/float64(v.Denominator))
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}
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}
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fmt.Printf(sample, tag.IfdPath, tag.TagName, tag.TagId, tag.TagTypeName, value)
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default:
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fmt.Printf(sample, tag.IfdPath, tag.TagName, tag.TagId, tag.TagTypeName, val)
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}
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case "IFD/GPSInfo.GPSTimeStamp":
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switch val := tag.Value.(type) {
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case []exifcommon.Rational:
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var value string
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for _, v := range val {
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value += fmt.Sprintf("%.0f:", float64(v.Numerator)/float64(v.Denominator))
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}
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fmt.Printf(sample, tag.IfdPath, tag.TagName, tag.TagId, tag.TagTypeName, value[:len(value)-1]) // 去掉最后一个冒号
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default:
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fmt.Printf(sample, tag.IfdPath, tag.TagName, tag.TagId, tag.TagTypeName, val)
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}
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default:
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switch val := tag.Value.(type) {
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case []exifcommon.Rational:
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switch tag.IfdPath + "." + tag.TagName {
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case "IFD/Exif.ExposureTime":
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sample += "秒"
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}
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fmt.Printf(sample, tag.IfdPath, tag.TagName, tag.TagId, tag.TagTypeName, float64(val[0].Numerator)/float64(val[0].Denominator))
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case []uint16:
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if len(val) == 1 {
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switch tag.IfdPath + "." + tag.TagName {
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case "IFD/Exif.ExposureProgram":
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valStr := ""
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switch val[0] {
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case 0:
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valStr = "未知"
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case 1:
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valStr = "手动"
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case 2:
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valStr = "自动"
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case 3:
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valStr = "光圈优先"
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case 4:
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valStr = "快门优先"
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case 5:
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valStr = "创意（慢速）"
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case 6:
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valStr = "动作（高速）"
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case 7:
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valStr = "肖像"
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case 8:
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valStr = "景观"
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case 9:
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valStr = "Bulb"
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}
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fmt.Printf(sample, tag.IfdPath, tag.TagName, tag.TagId, tag.TagTypeName, valStr)
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continue
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case "IFD/Exif.MeteringMode":
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/*
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0 = Unknown
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1 = Average
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2 = Center-weighted average
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3 = Spot
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4 = Multi-spot
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5 = Multi-segment
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6 = Partial
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255 = Other
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*/
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valStr := ""
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switch val[0] {
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case 0:
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valStr = "未知"
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case 1:
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valStr = "平均"
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case 2:
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valStr = "中央重点平均"
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case 3:
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valStr = "点测光"
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case 4:
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valStr = "多点测光"
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case 5:
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valStr = "多段测光"
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case 6:
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valStr = "局部测光"
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case 255:
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valStr = "其他"
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}
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fmt.Printf(sample, tag.IfdPath, tag.TagName, tag.TagId, tag.TagTypeName, valStr)
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continue
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}
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fmt.Printf(sample, tag.IfdPath, tag.TagName, tag.TagId, tag.TagTypeName, val[0])
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} else {
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fmt.Printf(sample, tag.IfdPath, tag.TagName, tag.TagId, tag.TagTypeName, val)
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}
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case []uint32:
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if len(val) == 1 {
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fmt.Printf(sample, tag.IfdPath, tag.TagName, tag.TagId, tag.TagTypeName, val[0])
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} else {
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fmt.Printf(sample, tag.IfdPath, tag.TagName, tag.TagId, tag.TagTypeName, val)
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}
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case []uint8:
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fmt.Printf(sample, tag.IfdPath, tag.TagName, tag.TagId, tag.TagTypeName, hex.EncodeToString(val))
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case string:
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fmt.Printf(sample, tag.IfdPath, tag.TagName, tag.TagId, tag.TagTypeName, val)
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default:
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fmt.Printf(sample, tag.IfdPath, tag.TagName, tag.TagId, tag.TagTypeName, val)
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}
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}
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}
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return nil
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}
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