近期公司组织了书画摄影比赛,本人作为摄影爱好者,平时也会拍些照片,这次比赛当然不能错过。为了提高获奖概率,选了19张图像作为参赛作品。但是,摄影作品要提交图像的光圈、曝光时间等参数。一两张还可以通过电脑自带软件右键查看图像参数并一个个复制,但现在有19张,让我一点点复制还不如直接放弃参与了。谁让咱们还有一个身份是coder,那就现场手撸个小程序批量输出图像的EXIF信息。
开发需求很简单,就是能手动选取一个文件夹,然后读取该路径下的所有文件(图片),然后提取每张图像的exif信息,并将结果显示到界面,然后将Ctrl + A复制所有信息即可。在开发上,语言选择c#,搭配WPF框架,并选择ExifLib这个轻量化的EXIF信息提取库获取图像参数信息,下图是最终的提取信息。
XAML主要代码:
csharp
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="auto"/>
</Grid.RowDefinitions>
<TextBox x:Name="textBox" Grid.Row="0"/>
<Button Content="请选择一个路径" Click="Button_Click" Grid.Row="1" Background="LightBlue" Margin="2,0,2,2" Padding="5" />
</Grid>
cs逻辑代码:
csharp
using ExifLib;
private void Button_Click(object sender, RoutedEventArgs e)
{
// 创建一个选择文件路径的对话框
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Multiselect = false;
openFileDialog.CheckFileExists = false;
openFileDialog.FileName = "Folder Selection.";
openFileDialog.Filter = "Folders|no.files";
Dictionary<string, string> dic_pathAndName = new Dictionary<string, string>();
if (openFileDialog.ShowDialog() == true)
{
string folderPath = System.IO.Path.GetDirectoryName(openFileDialog.FileName);
// 使用 DirectoryInfo 类获取该路径下的所有文件
DirectoryInfo directoryInfo = new DirectoryInfo(folderPath);
FileInfo[] fileInfos = directoryInfo.GetFiles();
// 处理获取到的文件
foreach (FileInfo fileInfo in fileInfos)
{
Debug.WriteLine(fileInfo.Name);
//dic_pathAndName[System.IO.Path.GetFileNameWithoutExtension(fileInfo.FullName)] = fileInfo.FullName;//key为没有后缀名的文件名
dic_pathAndName[fileInfo.Name] = fileInfo.FullName;
}
}
if (dic_pathAndName.Count == 0) return;
foreach (var dic in dic_pathAndName)
{
Debug.WriteLine($"{dic.Key}: {getImageExifInfo(dic.Value)}");
textBox.AppendText($"{dic.Key}, {getImageExifInfo(dic.Value)}\n");
}
}
string getImageExifInfo(string path)
{
if (!File.Exists(path)) return "";
string res = "";
try
{
using (ExifReader reader = new ExifReader(path))
{
// 相机制造商
if (reader.GetTagValue(ExifTags.Make, out string make))
Debug.WriteLine("相机制造商: " + make);
// 相机型号
if (reader.GetTagValue(ExifTags.Model, out string model))
Debug.WriteLine("相机型号: " + model);
// 光圈
if (reader.GetTagValue(ExifTags.FNumber, out double fNumber))
{
var fNumberFraction = FractionFromDouble(fNumber);
Debug.WriteLine("光圈: F/" + fNumber);
}
string time = "";
// 快门速度
if (reader.GetTagValue(ExifTags.ExposureTime, out double exposureTime))
{
var exposureTimeFraction = FractionFromDouble(exposureTime);
time = exposureTimeFraction.Item1 + "/" + exposureTimeFraction.Item2;
}
// ISO
if (reader.GetTagValue(ExifTags.ISOSpeedRatings, out ushort isoSpeedRatings))
Debug.WriteLine("ISO: " + isoSpeedRatings);
曝光时间
//if (reader.GetTagValue(ExifTags.ExposureTime, out double exposureTime))
// Debug.WriteLine("曝光时间: " + exposureTime.ToString("0.##") + " s");
// 焦距
if (reader.GetTagValue(ExifTags.FocalLength, out double focalLength))
Debug.WriteLine("焦距: " + focalLength.ToString("0.##") + " mm");
res = $"{model} f/{fNumber} {time}s ISO-{isoSpeedRatings} {focalLength}mm";
}
}
catch (Exception e)
{
}
return res;
}
private Tuple<int, int> FractionFromDouble(double value, double error = 0.0001)
{
int denominator = 1;
while (Math.Abs(value * denominator - Math.Round(value * denominator)) > error)
denominator++;
return Tuple.Create((int)Math.Round(value * denominator), denominator);
}
以上代码直接复制、拷贝走,然后可以根据自己的需求输出想要的图像参数信息,并随意定义文本格式,爽歪歪。