Imagemagick：将TIF图像转换为EPS以保持分辨率

几天来，我一直在尝试将tif图像转换为eps图像，以保持原始分辨率。但是没有成功。问题在于，imagemagick始终将eps图像的分辨率设置为72 dpi，而不管在输入文件之前或之后使用“密度”和“调整大小”命令

可以下载，例如我尝试了以下imagemagick命令（所有命令都没有理想的结果）：

我的转换有什么问题？我只需要一个分辨率为300 dpi的输出eps图像作为输入tif文件。 添加：output.eps的标识

Image: output.eps
  Format: PAM (Common 2-dimensional bitmap format)
  Mime type: image/x-portable-pixmap
  Class: DirectClass
  Geometry: 680x907+0+0
  Resolution: 72x72
  Print size: 9.44444x12.5972
  Units: Undefined
  Type: ColorSeparation
  Base type: ColorSeparation
  Endianess: Undefined
  Colorspace: CMYK
  Depth: 16/8-bit
  Channel depth:
    cyan: 8-bit
    magenta: 8-bit
    yellow: 8-bit
    black: 8-bit
  Channel statistics:
    Pixels: 616760
    Cyan:
      min: 0 (0)
      max: 65535 (1)
      mean: 8034.92 (0.122605)
      standard deviation: 16075.5 (0.245296)
      kurtosis: 3.34548
      skewness: 2.18869
    Magenta:
      min: 0 (0)
      max: 63993 (0.976471)
      mean: 6431.6 (0.0981399)
      standard deviation: 13251.7 (0.202209)
      kurtosis: 4.41467
      skewness: 2.36107
    Yellow:
      min: 0 (0)
      max: 62965 (0.960784)
      mean: 3296.53 (0.0503018)
      standard deviation: 8665.27 (0.132224)
      kurtosis: 11.9555
      skewness: 3.37656
    Black:
      min: 0 (0)
      max: 61166 (0.933333)
      mean: 3413.91 (0.052093)
      standard deviation: 10294.1 (0.157078)
      kurtosis: 10.6052
      skewness: 3.33169
  Image statistics:
    Overall:
      min: 0 (0)
      max: 65535 (1)
      mean: 5294.24 (0.0807849)
      standard deviation: 12400.4 (0.189219)
      kurtosis: 7.42941
      skewness: 2.89771
  Total ink density: 324.706%
  Rendering intent: Perceptual
  Gamma: 0.454545
  Chromaticity:
    red primary: (0.64,0.33)
    green primary: (0.3,0.6)
    blue primary: (0.15,0.06)
    white point: (0.3127,0.329)
  Background color: cmyk(255,255,255,0)
  Border color: cmyk(223,223,223,0)
  Matte color: cmyk(189,189,189,0)
  Transparent color: cmyk(0,0,0,0)
  Interlace: None
  Intensity: Undefined
  Compose: Over
  Page geometry: 680x907+0+0
  Dispose: Undefined
  Iterations: 0
  Compression: Undefined
  Orientation: Undefined
  Properties:
    date:create: 2015-09-09T10:21:04+02:00
    date:modify: 2015-09-09T10:21:04+02:00
    ps:HiResBoundingBox: 680.4x907.2+0+0
    ps:Level: Adobe-3.0 EPSF-3.0

    signature: 141246e610fe99f6d715095d32098b493a3258c58c755dd44cacb68b5be4129a
  Artifacts:
    filename: output.eps
    verbose: true
  Tainted: False
  Filesize: 2.467MB
  Number pixels: 617K
  Pixels per second: 9.223372EB
  User time: 0.000u
  Elapsed time: 0:01.000
  Version: ImageMagick 6.8.9-8 Q16 x64 2014-08-26 http://www.imagemagick.org

添加：temp.png的标识

Image: temp.png
  Format: PNG (Portable Network Graphics)
  Mime type: image/png
  Class: DirectClass
  Geometry: 2835x3780+0+0
  Resolution: 300x300
  Print size: 9.45x12.6
  Units: Undefined
  Type: TrueColor
  Endianess: Undefined
  Colorspace: sRGB
  Depth: 16-bit
  Channel depth:
    red: 16-bit
    green: 16-bit
    blue: 16-bit
  Channel statistics:
    Pixels: 10716300
    Red:
      min: 0 (0)
      max: 65535 (1)
      mean: 56707.6 (0.865302)
      standard deviation: 17939.1 (0.273732)
      kurtosis: 3.27011
      skewness: -2.18726
    Green:
      min: 771 (0.0117647)
      max: 65535 (1)
      mean: 57871 (0.883055)
      standard deviation: 16384.1 (0.250006)
      kurtosis: 3.99522
      skewness: -2.33806
    Blue:
      min: 1419 (0.0216526)
      max: 65535 (1)
      mean: 60137.5 (0.91764)
      standard deviation: 13808.7 (0.210707)
      kurtosis: 6.52445
      skewness: -2.76051
  Image statistics:
    Overall:
      min: 0 (0)
      max: 65535 (1)
      mean: 58238.7 (0.888665)
      standard deviation: 16134.1 (0.246191)
      kurtosis: 4.60442
      skewness: -2.44957
  Rendering intent: Perceptual
  Gamma: 0.45455
  Chromaticity:
    red primary: (0.64,0.33)
    green primary: (0.3,0.6)
    blue primary: (0.15,0.06)
    white point: (0.3127,0.329)
  Background color: white
  Border color: srgb(223,223,223)
  Matte color: grey74
  Transparent color: black
  Interlace: None
  Intensity: Undefined
  Compose: Over
  Page geometry: 2835x3780+0+0
  Dispose: Undefined
  Iterations: 0
  Compression: Zip
  Orientation: Undefined
  Properties:
    date:create: 2015-09-09T10:16:17+02:00
    date:modify: 2015-09-09T10:18:20+02:00
    png:bKGD: chunk was found (see Background color, above)
    png:cHRM: chunk was found (see Chromaticity, above)
    png:gAMA: gamma=0.45454544 (See Gamma, above)
    png:IHDR.bit-depth-orig: 16
    png:IHDR.bit_depth: 16
    png:IHDR.color-type-orig: 2
    png:IHDR.color_type: 2 (Truecolor)
    png:IHDR.interlace_method: 0 (Not interlaced)
    png:IHDR.width,height: 2835, 3780
    png:pHYs: x_res=300, y_res=300, units=0
    png:sRGB: intent=0 (Perceptual Intent)
    png:text: 4 tEXt/zTXt/iTXt chunks were found
    ps:HiResBoundingBox: 680.4x907.2+0+0
    ps:Level: Adobe-3.0 EPSF-3.0

    signature: dffc47b2e7b1b0bdc1c8afe849bc84561743fe757c4ebb5093487547f67f2d9d
  Artifacts:
    filename: temp.png
    verbose: true
  Tainted: False
  Filesize: 13.38MB
  Number pixels: 10.72M
  Pixels per second: 20.61MB
  User time: 0.530u
  Elapsed time: 0:01.520
  Version: ImageMagick 6.8.9-8 Q16 x64 2014-08-26 http://www.imagemagick.org

---

您的ImageMagick版本和操作系统是什么？我认为

identify

的输出可能会误导您-EPS文件是矢量文件，您通常在读取它们时指定分辨率。尝试运行

convert-density 300 output.eps temp.png

并查看

png

文件的尺寸和质量。我使用以下版本：版本：ImageMagick 6.8.9-8 Q16 x64 2014-08-26；特点：DPC模块OpenMP；代表：bzlib cairo freetype jbig jng jp2 jpeg lcms lqr pangocairo png ps rsvg tiff webp xmlzlib@Mark：我已经运行了您的命令，并将“标识”文件附加到我的上述问题。您的意思是，转换的eps文件的标识信息是错误的吗？如果您运行我建议的

convert

命令，会发生什么情况？您是否将原始图像恢复到其原始大小和质量？您的ImageMagick版本和操作系统是什么？我认为

identify

的输出可能会误导您-EPS文件是矢量文件，您通常在读取它们时指定分辨率。尝试运行

convert-density 300 output.eps temp.png

并查看

png

文件的尺寸和质量。我使用以下版本：版本：ImageMagick 6.8.9-8 Q16 x64 2014-08-26；特点：DPC模块OpenMP；代表：bzlib cairo freetype jbig jng jp2 jpeg lcms lqr pangocairo png ps rsvg tiff webp xmlzlib@Mark：我已经运行了您的命令，并将“标识”文件附加到我的上述问题。您的意思是，转换的eps文件的标识信息是错误的吗？如果您运行我建议的

convert

命令，会发生什么情况？您是否将原始图像恢复为其原始大小和质量？

Image: temp.png
  Format: PNG (Portable Network Graphics)
  Mime type: image/png
  Class: DirectClass
  Geometry: 2835x3780+0+0
  Resolution: 300x300
  Print size: 9.45x12.6
  Units: Undefined
  Type: TrueColor
  Endianess: Undefined
  Colorspace: sRGB
  Depth: 16-bit
  Channel depth:
    red: 16-bit
    green: 16-bit
    blue: 16-bit
  Channel statistics:
    Pixels: 10716300
    Red:
      min: 0 (0)
      max: 65535 (1)
      mean: 56707.6 (0.865302)
      standard deviation: 17939.1 (0.273732)
      kurtosis: 3.27011
      skewness: -2.18726
    Green:
      min: 771 (0.0117647)
      max: 65535 (1)
      mean: 57871 (0.883055)
      standard deviation: 16384.1 (0.250006)
      kurtosis: 3.99522
      skewness: -2.33806
    Blue:
      min: 1419 (0.0216526)
      max: 65535 (1)
      mean: 60137.5 (0.91764)
      standard deviation: 13808.7 (0.210707)
      kurtosis: 6.52445
      skewness: -2.76051
  Image statistics:
    Overall:
      min: 0 (0)
      max: 65535 (1)
      mean: 58238.7 (0.888665)
      standard deviation: 16134.1 (0.246191)
      kurtosis: 4.60442
      skewness: -2.44957
  Rendering intent: Perceptual
  Gamma: 0.45455
  Chromaticity:
    red primary: (0.64,0.33)
    green primary: (0.3,0.6)
    blue primary: (0.15,0.06)
    white point: (0.3127,0.329)
  Background color: white
  Border color: srgb(223,223,223)
  Matte color: grey74
  Transparent color: black
  Interlace: None
  Intensity: Undefined
  Compose: Over
  Page geometry: 2835x3780+0+0
  Dispose: Undefined
  Iterations: 0
  Compression: Zip
  Orientation: Undefined
  Properties:
    date:create: 2015-09-09T10:16:17+02:00
    date:modify: 2015-09-09T10:18:20+02:00
    png:bKGD: chunk was found (see Background color, above)
    png:cHRM: chunk was found (see Chromaticity, above)
    png:gAMA: gamma=0.45454544 (See Gamma, above)
    png:IHDR.bit-depth-orig: 16
    png:IHDR.bit_depth: 16
    png:IHDR.color-type-orig: 2
    png:IHDR.color_type: 2 (Truecolor)
    png:IHDR.interlace_method: 0 (Not interlaced)
    png:IHDR.width,height: 2835, 3780
    png:pHYs: x_res=300, y_res=300, units=0
    png:sRGB: intent=0 (Perceptual Intent)
    png:text: 4 tEXt/zTXt/iTXt chunks were found
    ps:HiResBoundingBox: 680.4x907.2+0+0
    ps:Level: Adobe-3.0 EPSF-3.0

    signature: dffc47b2e7b1b0bdc1c8afe849bc84561743fe757c4ebb5093487547f67f2d9d
  Artifacts:
    filename: temp.png
    verbose: true
  Tainted: False
  Filesize: 13.38MB
  Number pixels: 10.72M
  Pixels per second: 20.61MB
  User time: 0.530u
  Elapsed time: 0:01.520
  Version: ImageMagick 6.8.9-8 Q16 x64 2014-08-26 http://www.imagemagick.org