Legacy ImageMagick Discussions Archive

Hi there,

trying to convert EPS to TIF. Want so get the same result as doing so in Photoshop (Open EPS - Save as TIF with LZW Compression)

Commandline: convert -compress LZW image.eps image.tif

With ImageMagick 6.5.4-Q8 the EPS is converted to a TIF in base geometry size. So does Photoshop too.

With ImageMagick 6.9.3-Q16 the EPS is convertes to a TIF in page geometry size.

How does this come? How can i get 6.9.3 to use base geometry for sizing?

Greetings,

KC

Identify -verbose from the EPS:

Code: Select all

Image: P:\ELO\Zeitschriften\prog\01_01_0001.eps
  Format: PS (PostScript)
  Mime type: application/postscript
  Class: DirectClass
  Geometry: 851x688+0+0
  Base geometry: 3544x2866
  Resolution: 300x300
  Print size: 2.83667x2.29333
  Units: PixelsPerInch
  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: 585488
    Cyan:
      min: 0 (0)
      max: 65535 (1)
      mean: 31682.4 (0.483443)
      standard deviation: 19092.2 (0.291329)
      kurtosis: -0.946258
      skewness: -0.355256
      entropy: 0.908727
    Magenta:
      min: 0 (0)
      max: 65535 (1)
      mean: 32941 (0.502648)
      standard deviation: 18453.2 (0.281578)
      kurtosis: -1.07035
      skewness: 0.510134
      entropy: 0.921316
    Yellow:
      min: 0 (0)
      max: 65535 (1)
      mean: 21972.8 (0.335284)
      standard deviation: 22284.7 (0.340043)
      kurtosis: -1.43844
      skewness: 0.401641
      entropy: 0.787666
    Black:
      min: 0 (0)
      max: 65535 (1)
      mean: 9012.55 (0.137523)
      standard deviation: 16334.4 (0.249247)
      kurtosis: 2.98807
      skewness: 1.99241
      entropy: 0.540402
  Image statistics:
    Overall:
      min: 0 (0)
      max: 65535 (1)
      mean: 23902.2 (0.364724)
      standard deviation: 19160.2 (0.292366)
      kurtosis: -0.179813
      skewness: 0.522875
      entropy: 0.789528
  Total ink density: 400%
  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: 851x688+0+0
  Dispose: Undefined
  Iterations: 0
  Compression: Undefined
  Orientation: Undefined
  Properties:
    date:create: 2016-04-11T15:49:29+02:00
    date:modify: 2016-04-11T15:49:29+02:00
    ps:HiResBoundingBox: 850.56x687.84+0+0
    ps:Level: Adobe-3.0 EPSF-3.0

    signature: 020649830b0cb8e2434e4be973e975b03273acb546dee5251a969399282d163e
  Profiles:
    Profile-8bim: 6560 bytes
    Profile-iptc: 417 bytes
      unknown[2,0]: 
      Caption[2,120]: Teenager, Zielscheibe, Pfeile


auáen, M„dchen, Bogenschltze, Jugendliche, lachen, Bogen, Pfeile, Sportbogen, Bogenschieáen, Freizeit, Hobby, Sport, Freizeitbesch„ftigung, Ziel, Treffer, Treffpunkt, Training, Freude, Spaá
      Byline[2,80]: Pigneter
      Credit[2,110]: Mauritius
      Created Date[2,55]: 20001025
      Priority[2,10]: 0
      unknown[2,16]: Menschen, Berufe:Fitness, Frauen einzeln:Bogenschieáen
      unknown[2,21]: 1423
      unknown[2,23]: 00000
      unknown[2,56]: 19941128
      unknown[2,111]: 
      unknown[2,112]: 0002548
      unknown[2,113]: 
      Local Caption[2,121]: 01531619
      unknown[2,123]: 0000
  Artifacts:
    filename: P:\ELO\Zeitschriften\prog\01_01_0001.eps
    verbose: true
  Tainted: False
  Filesize: 2.342MB
  Number pixels: 585K
  Pixels per second: 117.1MB
  User time: 0.016u
  Elapsed time: 0:01.005
  Version: ImageMagick 6.9.3-8 Q16 x64 2016-04-10 http://www.imagemagick.org

Try:

convert -compress LZW -density 1250 image.eps image.tif

Thank you for your reply.

-density 1250
gives me a file with size of 610MB - this is much too big.
And why 1250??

The tif converted with Photoshop is 22MB
the tif from the old imagemagick version is 32MB
the EPS is 7MB

300*3544/851 = 300*2866/688 = 1250

Does this give you the same number of pixels as Photoshop? If not, then what density does?

Photoshop-TIF with a size of 22MB:
3544 x 2866 Pixel
300dpi
32Bit
LZW

If i use
-compress LZW -density 300 -depth 8
i get the same pixels and depth like with photoshop
but the file is 34MB

Can you post your input EPS and PS TIF to some place such as dropbox.com and put the URL's here?

Here is the EPS:
https://onedrive.live.com/redir?resid=B ... file%2ceps

And here the TIF from Photoshop:
https://onedrive.live.com/redir?resid=B ... hoto%2ctif

And here the TIF made with ImageMagick-6.9.3-Q16\convert.exe -compress LZW -density 300 -depth 8
https://onedrive.live.com/redir?resid=B ... hoto%2ctif

I do not see a difference in output size. My IM 6.9.3.8 Q16 makes the same 3544 x 2866 dimension on output using -density 300 when converting the eps to tif.

EDIT: It is strange that when I do

Code: Select all

convert -density 300 -colorspace sRGB 01_01_0001.eps 01_01_0001.ps

the resulting ps file shows only a smaller top left area than in the original eps. So it would appear that something is telling ghostscript to use the smaller area.

I really do not see much difference between your PS created tif and the IM created tif as follows in IM 6.9.3.8 Q16 Mac OSX:

Code: Select all

convert -density 300 01_01_0001.eps tmp2.tif
compare -metric rmse 01_01_0001.tif tmp2.tif null:

26.3575 (0.00040219)

This a .04% difference or 26 out of 65535.

When i use the density parameter the pixel size is good in IM. This Problem is solved.

But still left is the file-size of the TIF made by IM is much bigger than the PS TIF.

PS TIF: 22MB
IM TIF: 34MB

Your PS tiff is LZW compressed. In IM add -compression LZW to your command before the output. I don't believe IM compresses by default, but gives an uncompressed output for TIFF.

Please see my posting above:

And here the TIF made with ImageMagick-6.9.3-Q16\convert.exe -compress LZW -density 300 -depth 8
https://onedrive.live.com/redir?resid=B ... hoto%2ctif

The IM TIF is already compressed but still 1/3 bigger than the PS TIF...

Identity -verbose of the IM TIF:

Image: P:\EDV\MagicTiffCompressDens3.tif
Format: TIFF (Tagged Image File Format)
Class: DirectClass
Geometry: 3544x2866+0+0
Resolution: 300x300
Print size: 11.8133x9.55333
Units: PixelsPerInch
Type: ColorSeparation
Base type: ColorSeparation
Endianess: MSB
Colorspace: CMYK
Depth: 8-bit
Channel depth:
cyan: 8-bit
magenta: 8-bit
yellow: 8-bit
black: 8-bit
Channel statistics:
cyan:
min: 0 (0)
max: 255 (1)
mean: 123.335 (0.483667)
standard deviation: 74.2814 (0.2913)
kurtosis: -0.944191
skewness: -0.354135
magenta:
min: 0 (0)
max: 255 (1)
mean: 128.297 (0.503124)
standard deviation: 71.7852 (0.281511)
kurtosis: -1.07451
skewness: 0.509974
yellow:
min: 0 (0)
max: 255 (1)
mean: 85.6372 (0.335832)
standard deviation: 86.753 (0.340208)
kurtosis: -1.43748
skewness: 0.400375
black:
min: 0 (0)
max: 255 (1)
mean: 35.1239 (0.137741)
standard deviation: 63.5975 (0.249402)
kurtosis: 2.98061
skewness: 1.9907
Image statistics:
Overall:
min: 0 (0)
max: 255 (1)
mean: 74.4786 (0.292073)
standard deviation: 83.361 (0.326906)
kurtosis: -0.919123
skewness: 0.70153
Total ink density: 400%
Rendering intent: Undefined
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)
Interlace: None
Background color: white
Border color: cmyk(223,223,223,0)
Matte color: grey74
Transparent color: black
Page geometry: 3544x2866+0+0
Dispose: Undefined
Iterations: 0
Compression: LZW
Orientation: TopLeft
Properties:
date:create: 2016-04-15T08:30:12+02:00
date:modify: 2016-04-15T08:30:02+02:00
signature: ac35a6cac27cce26ab9a09a470a35342101ec607f3d5a363852d4a3b430d0cd6
tiff:photometric: separated
tiff:rows-per-strip: 1
Profiles:
Profile-8bim: 6560 bytes
Profile-iptc: 420 bytes
unknown[2,0]:
Caption[2,120]: Teenager, Zielscheibe, Pfeile

auáen, M„dchen, Bogenschltze, Jugendliche, lachen, Bogen, Pfeile, Sportbogen, Bogenschieáen, Freizeit, Hobby, Sport, Freizeitbesch„ftigung, Ziel, Treffer, Treffpunkt, Training, Freude, Spaá
Byline[2,80]: Pigneter
Credit[2,110]: Mauritius
Created Date[2,55]: 20001025
Priority[2,10]: 0
unknown[2,16]: Menschen, Berufe:Fitness, Frauen einzeln:Bogenschieáen
unknown[2,21]: 1423
unknown[2,23]: 00000
unknown[2,56]: 19941128
unknown[2,111]:
unknown[2,112]: 0002548
unknown[2,113]:
Local Caption[2,121]: 01531619
unknown[2,123]: 0000
Artifacts:
verbose: true
Tainted: False
Filesize: 33.14mb
Number pixels: 9.687mb
Pixels per second: 15.5mb
User time: 0.609u
Elapsed time: 0:01
Version: ImageMagick 6.5.4-8 2009-08-03 Q8 OpenMP http://www.imagemagick.org

Different software uses different compression algorithms, giving different sizes. IM's "-compression ZIP" gives a filesize that is closer to the filesize from Photoshop.

OK... i thought LZW is a standard algorithm and works equal in every software - but that was a fault.
So the only thing i can do is to use photoshop.

Thank you!

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