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nzgmw

Posts 9
I'm a little confused about one of the requirements in the Image Submission Guide. The guide says all files must be 300dpi. As far as I know, dpi is a print setting, not a camera setting. How do we supply an image in 300dpi without adjusting it in Photoshop? (The same guidelines say dpi adjustments are not allowed.)

absolut_thomas

Posts 24
Hi Greg!

That's a good one... We've been querying this several times over the years here - as it does not make sense at all, it's just one extra bit of work which we all will have to do, apparently.

A friend of mine who used to supply images to MCB too even wrote them (this was the previous owners though - I think) a wee little program which would change the dpi setting on the chillys end, but no, we will have to that ourselves.
Supposedly it shall help to keep non-professionals who don't know how to change the dpi setting from uploading images...

Let's see, where this next round is gonna take us, I'd be glad if we could skip this rule... :-)

Cheers,
Thomas

mychillybin team

Posts 590
Thanks for this query. The best & recommended way to achieve a 300 dpi file is to shoot in RAW. Then when using the file conversion program supplied with the camera (or Photoshop or similar program) to convert this RAW file to a jpg, have the resolution set to be 300 dpi so you get a file ready to submit.

If starting with a jpg file, then dpi can be changed in Photoshop without resampling. If the number of pixels stays the same before and after the dpi change - then the dpi has been changed correctly. Making such a change necessarily involves a (further) jpg save with resultant drop in image quality - one of the reasons for the preference to start with a RAW file.

The prohibition on dpi changes is with changing the dpi in a way that resamples the image - hence the need to ensure that the resampling box is never ticked or enabled.

As you suggest the dpi is print, edit/design, or screen display related and has no effect on the number of pixels in the image. mychillybin standardises at 300 dpi for the convenience of customers; at the resolution normally used for commercial print work.

Hope this helps. If not please ask further.

cheers for now
the Chillys

mychillybin team

Posts 590
Thomas - we will think about your jpg dpi conversion program possibility at mychillybin end in due course - which sounds like it can work - although there is no need for this of course if shooting in RAW and processing to jpg at the 300 dpi.

cheers for now
the Chillys

nzgmw

Posts 9
mychillybin team wrote:

Thanks for this query. The best & recommended way to achieve a 300 dpi file is to shoot in RAW. Then when using the file conversion program supplied with the camera (or Photoshop or similar program) to convert this RAW file to a jpg, have the resolution set to be 300 dpi so you get a file ready to submit.

If starting with a jpg file, then dpi can be changed in Photoshop without resampling. If the number of pixels stays the same before and after the dpi change - then the dpi has been changed correctly. Making such a change necessarily involves a (further) jpg save with resultant drop in image quality - one of the reasons for the preference to start with a RAW file.

The prohibition on dpi changes is with changing the dpi in a way that resamples the image - hence the need to ensure that the resampling box is never ticked or enabled.

As you suggest the dpi is print, edit/design, or screen display related and has no effect on the number of pixels in the image. mychillybin standardises at 300 dpi for the convenience of customers; at the resolution normally used for commercial print work.

Hope this helps. If not please ask further.

cheers for now
the Chillys


Hi. Thanks you for the response. This all makes perfect sense and I have no problem adhering to the requirement. It's a shame this more detailed explanation is not on the main website. The information about unchecking the resampling box would have been particularly helpful when I made my first (as a member) upload a couple of weeks ago. At that time, I used Photoshop to change the dpi from the default (240) to 300. But I did not realise I should also uncheck the resampling box. So presumably this first upload of images was a waste of time. I'll get over it. But I'm sure other newcomers will make the same mistake. So perhaps a little more detail on your web site please. Cheers Greg

mychillybin team

Posts 590
The explanation about the re-sampling box is on this page. It can alwasy be improved of course - will take a look at this page again once we catch up on processing images.

Cheers
the Chillys
edited by mychillybin team on 13/02/2012

nzgmw

Posts 9
mychillybin team wrote:

The explanation about the re-sampling box is on this page. It can alwasy be improved of course - will take a look at this page again once we catch up on processing images.

Cheers
the Chillys
edited by mychillybin team on 13/02/2012


Thank you. Never saw that page and I'm not sure why

Declan O''''Neill

Posts 2
The other useful advice for those converting from RAW to jpeg is to check that the photoshop settings under image/mode are set to 8 bit. Its very easy to forget, if you don't use jpeg much, that you can only convert from RAW /TIFF etc if the mode setting is at 8 bit.

Personally I would not use any jpeg settings on a camera as once you do that you are stuck with the particular settings (colour/contrast/WB etc)built into the compression software on the camera. You may find yourself having to adjust these again in PS. Much easier to do it just once and get the result you are looking for.
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