Help! : PEF to JPG

bluespearbone · 11-19-2007, 06:34 PM

This idiot hasn't found a way of doing it. A very simple thing.

For any given RAW @ 240dpi (thats what mine appear to be), create a maximum quality Jpeg retaining the dpi and setting the colour space as Adobe RGB 1998.

Anyone know how or perhaps of a freeware utility?

All my attempts have ended up as sRGB @ 96dpi

Thanks in advance.

**newmikey** · 11-20-2007, 02:45 AM

Originally posted by bluespearbone

This idiot hasn't found a way of doing it. A very simple thing.

For any given RAW @ 240dpi (thats what mine appear to be), create a maximum quality Jpeg retaining the dpi and setting the colour space as Adobe RGB 1998.

Anyone know how or perhaps of a freeware utility?

All my attempts have ended up as sRGB @ 96dpi

Thanks in advance.

Use RAW software? I'm not sure I understand what you are trying to do. DPI is an output setting, the RAW file doesn't "have" any DPI assigned to it, it's just a collection of output data in rows and columns, with some statistical data attached (WB, Exp, Exif etc) straight from the sensor.

As to freeware: get UFRaw, the best OSS RAW converter I know of.

bluespearbone · 11-20-2007, 08:14 PM

Thanks Mikey.

Seems i just don't know or understand enough about raw images.
When I import a raw from the K100D it appears to come in as 3008x2008 pixels @ 240dpi, which I have assumed to be the maximum output resolution of the sensor. When i subsequently try to convert to the jpeg format, resolution drops to 72 or 96dpi (according to file properties). I would prefer to see something towards 300dpi before submitting the images for printing.

little laker · 11-20-2007, 09:10 PM

bluespearbone,
That's just your software programs default setting, which is normal.

Depending upon what program your using you more or less go to the re-size feature.

Then you alter the hight, width and DPI.

Some programs will remember this setting for you when others won't.

Before you re-size everything to 300 DPI I would strongly suggest that you talk to your printers about it. Some of their machines work better at different settings.

For the most part they'll take care of everything, so you shouldn't have to worry about it.

bluespearbone · 11-21-2007, 09:49 PM

Thanks Stu.
After a bit more tinkering managed to get the images imported at 3008x2008 (which according to the K100D manual is the RAW dimension) @ 300dpi, giving a size of 25.47x17cm. Hopefully thats OK, but please feel free to sound the alarm if this fool has goofed.

11-19-2007, 06:34 PM	#1
bluespearbone Veteran Member Join Date: Jul 2007 Location: Derbyshire, United Kingdom Posts: 325	Help! : PEF to JPG This idiot hasn't found a way of doing it. A very simple thing. For any given RAW @ 240dpi (thats what mine appear to be), create a maximum quality Jpeg retaining the dpi and setting the colour space as Adobe RGB 1998. Anyone know how or perhaps of a freeware utility? All my attempts have ended up as sRGB @ 96dpi Thanks in advance.

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11-20-2007, 02:45 AM	#2
newmikey Site Supporter Join Date: May 2007 Photos: Gallery Posts: 2,289	Originally posted by bluespearbone This idiot hasn't found a way of doing it. A very simple thing. For any given RAW @ 240dpi (thats what mine appear to be), create a maximum quality Jpeg retaining the dpi and setting the colour space as Adobe RGB 1998. Anyone know how or perhaps of a freeware utility? All my attempts have ended up as sRGB @ 96dpi Thanks in advance. Use RAW software? I'm not sure I understand what you are trying to do. DPI is an output setting, the RAW file doesn't "have" any DPI assigned to it, it's just a collection of output data in rows and columns, with some statistical data attached (WB, Exp, Exif etc) straight from the sensor. As to freeware: get UFRaw, the best OSS RAW converter I know of.

11-20-2007, 08:14 PM	#3
bluespearbone Veteran Member Join Date: Jul 2007 Location: Derbyshire, United Kingdom Posts: 325 Original Poster	Thanks Mikey. Seems i just don't know or understand enough about raw images. When I import a raw from the K100D it appears to come in as 3008x2008 pixels @ 240dpi, which I have assumed to be the maximum output resolution of the sensor. When i subsequently try to convert to the jpeg format, resolution drops to 72 or 96dpi (according to file properties). I would prefer to see something towards 300dpi before submitting the images for printing.

11-20-2007, 09:10 PM	#4
little laker Veteran Member Join Date: Sep 2006 Photos: Gallery Posts: 5,697	bluespearbone, That's just your software programs default setting, which is normal. Depending upon what program your using you more or less go to the re-size feature. Then you alter the hight, width and DPI. Some programs will remember this setting for you when others won't. Before you re-size everything to 300 DPI I would strongly suggest that you talk to your printers about it. Some of their machines work better at different settings. For the most part they'll take care of everything, so you shouldn't have to worry about it.

11-21-2007, 09:49 PM	#5
bluespearbone Veteran Member Join Date: Jul 2007 Location: Derbyshire, United Kingdom Posts: 325 Original Poster	Thanks Stu. After a bit more tinkering managed to get the images imported at 3008x2008 (which according to the K100D manual is the RAW dimension) @ 300dpi, giving a size of 25.47x17cm. Hopefully thats OK, but please feel free to sound the alarm if this fool has goofed.