How to know which command settings of ImageMagick created a particular image
Consider I have created an image unknown.tiff from a page of a PDF, named doc.pdf, where the exact command for conversion aren't known. The size of this image is ~ 1MB.
The exact command isn't known, but it is known that the changes are majorly on depth and density. (A subset of these two, would do too)
Now, the normal command pattern is:
convert -density 300 PDF.pdf[page-number] -depth 8 image.tiff
But this gives me a file of ~17 MB, which obviously isn't the one I am looking for. If I remove depth, then I get a file of ~34 MB, and when I remove both, I get a blurred image of 2 MB. I also removed density only, then too the results don't match (~37 MB).
Since the output size of the image unknown.tiff is so low, I've hypothesized that it might take less time to get produced.
Since the time of conversion is of great concern to me, I want to know the ways I can come to the exact command which produced unknown.tiff
imagemagick imagemagick-convert imagemagick-identify
asked Nov 22 '18 at 11:21
MooncraterMooncrater
8601126
add a comment |
Consider I have created an image unknown.tiff from a page of a PDF, named doc.pdf, where the exact command for conversion aren't known. The size of this image is ~ 1MB.
The exact command isn't known, but it is known that the changes are majorly on depth and density. (A subset of these two, would do too)
Now, the normal command pattern is:
convert -density 300 PDF.pdf[page-number] -depth 8 image.tiff
But this gives me a file of ~17 MB, which obviously isn't the one I am looking for. If I remove depth, then I get a file of ~34 MB, and when I remove both, I get a blurred image of 2 MB. I also removed density only, then too the results don't match (~37 MB).
Since the output size of the image unknown.tiff is so low, I've hypothesized that it might take less time to get produced.
Since the time of conversion is of great concern to me, I want to know the ways I can come to the exact command which produced unknown.tiff
imagemagick imagemagick-convert imagemagick-identify
asked Nov 22 '18 at 11:21
MooncraterMooncrater
8601126
1
Tryidentify -verbose image.tiffto see what you can see...
– Mark Setchell
Nov 22 '18 at 13:36
If the TIF was created with ImageMagick it may have used one of several compression methods. The command...convert -list compress... will show you which methods are available in your version of IM. With most newer versions of IM, the compression method will be included in the output of the command...convert unknown.tiff -verbose info:. If that doesn't work, try what Mark said above...identify -verbose unknown.tiff.
– GeeMack
Nov 23 '18 at 15:04
add a comment |
Consider I have created an image unknown.tiff from a page of a PDF, named doc.pdf, where the exact command for conversion aren't known. The size of this image is ~ 1MB.
The exact command isn't known, but it is known that the changes are majorly on depth and density. (A subset of these two, would do too)
Now, the normal command pattern is:
convert -density 300 PDF.pdf[page-number] -depth 8 image.tiff
But this gives me a file of ~17 MB, which obviously isn't the one I am looking for. If I remove depth, then I get a file of ~34 MB, and when I remove both, I get a blurred image of 2 MB. I also removed density only, then too the results don't match (~37 MB).
Since the output size of the image unknown.tiff is so low, I've hypothesized that it might take less time to get produced.
Since the time of conversion is of great concern to me, I want to know the ways I can come to the exact command which produced unknown.tiff
imagemagick imagemagick-convert imagemagick-identify
asked Nov 22 '18 at 11:21
MooncraterMooncrater
8601126
Consider I have created an image unknown.tiff from a page of a PDF, named doc.pdf, where the exact command for conversion aren't known. The size of this image is ~ 1MB.
The exact command isn't known, but it is known that the changes are majorly on depth and density. (A subset of these two, would do too)
Now, the normal command pattern is:
convert -density 300 PDF.pdf[page-number] -depth 8 image.tiff
But this gives me a file of ~17 MB, which obviously isn't the one I am looking for. If I remove depth, then I get a file of ~34 MB, and when I remove both, I get a blurred image of 2 MB. I also removed density only, then too the results don't match (~37 MB).
Since the output size of the image unknown.tiff is so low, I've hypothesized that it might take less time to get produced.
Since the time of conversion is of great concern to me, I want to know the ways I can come to the exact command which produced unknown.tiff
imagemagick imagemagick-convert imagemagick-identify
imagemagick imagemagick-convert imagemagick-identify
asked Nov 22 '18 at 11:21
MooncraterMooncrater
8601126
asked Nov 22 '18 at 11:21
MooncraterMooncrater
8601126
asked Nov 22 '18 at 11:21
MooncraterMooncrater
8601126
asked Nov 22 '18 at 11:21
MooncraterMooncrater
8601126
asked Nov 22 '18 at 11:21
MooncraterMooncrater
8601126
8601126
1
Tryidentify -verbose image.tiffto see what you can see...
– Mark Setchell
Nov 22 '18 at 13:36
If the TIF was created with ImageMagick it may have used one of several compression methods. The command...convert -list compress... will show you which methods are available in your version of IM. With most newer versions of IM, the compression method will be included in the output of the command...convert unknown.tiff -verbose info:. If that doesn't work, try what Mark said above...identify -verbose unknown.tiff.
– GeeMack
Nov 23 '18 at 15:04
add a comment |
1
Tryidentify -verbose image.tiffto see what you can see...
– Mark Setchell
Nov 22 '18 at 13:36
If the TIF was created with ImageMagick it may have used one of several compression methods. The command...convert -list compress... will show you which methods are available in your version of IM. With most newer versions of IM, the compression method will be included in the output of the command...convert unknown.tiff -verbose info:. If that doesn't work, try what Mark said above...identify -verbose unknown.tiff.
– GeeMack
Nov 23 '18 at 15:04
1
1
Try
identify -verbose image.tiff to see what you can see...– Mark Setchell
Nov 22 '18 at 13:36
Try
identify -verbose image.tiff to see what you can see...– Mark Setchell
Nov 22 '18 at 13:36
If the TIF was created with ImageMagick it may have used one of several compression methods. The command...
convert -list compress ... will show you which methods are available in your version of IM. With most newer versions of IM, the compression method will be included in the output of the command... convert unknown.tiff -verbose info:. If that doesn't work, try what Mark said above... identify -verbose unknown.tiff.– GeeMack
Nov 23 '18 at 15:04
If the TIF was created with ImageMagick it may have used one of several compression methods. The command...
convert -list compress ... will show you which methods are available in your version of IM. With most newer versions of IM, the compression method will be included in the output of the command... convert unknown.tiff -verbose info:. If that doesn't work, try what Mark said above... identify -verbose unknown.tiff.– GeeMack
Nov 23 '18 at 15:04
add a comment |
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Try
identify -verbose image.tiffto see what you can see...– Mark Setchell
Nov 22 '18 at 13:36
If the TIF was created with ImageMagick it may have used one of several compression methods. The command...
convert -list compress... will show you which methods are available in your version of IM. With most newer versions of IM, the compression method will be included in the output of the command...convert unknown.tiff -verbose info:. If that doesn't work, try what Mark said above...identify -verbose unknown.tiff.– GeeMack
Nov 23 '18 at 15:04