I want to know how to resize a photo without loosing quality....... in the image resize box the is a check box that says maintain file size ......what does that do .
I have tried to resize using it and the file stays the same as the original.
Thanks for any advice
Mike
mike Rawlinson said:in the image resize box the is a check box that says maintain file size ......what does that do .
Ir should be changed to say maintain pixel count as that is what it does.
With Photo-PAINT you can change pixel count or you can maintain resolution and change physical size or you can change physical size and resolution.
If the unit of measurement is pixels and you want to change pixel coount just change them. but unchek the maintian image size
If you have the maintian box checked you can if using a measure other than pixels change physical size and the resolution goes up or down.
With a unit of measurement other than pixels you can change physical size and maintain resolution by unchecking the maintain image size.
I think there is something wrong to be honest ......I do the same thing in photoshop and it stays at 300dpi when i reopen it .........in corel it goes back to 72dpi.....even if I save it as a new doc....... somethings not right ......
Is there any tutorials on photo resample as i think its so complex with diff types of measurements and dpi.......... I'm confused.
Thanks for your replys
I've seen discussions about something like this for several versions of Draw/Photo-Paint.
I suspect there is a conflict between the DPI as stored in the file itself and DPI as stored in the EXIF meta-data. The short description is.... resample in Photo-paint & save. Other apps show the correct dpi (like photoshop or irfanview) as stored in the file itself. But photo-paint seems to read the exif dpi instead when you re-open it.
Anyway, that's my suspicion.
Frustrating.
Yes Harry its a 24bit Jpeg...... but heres the strange thing if I save it in CPT its keeps the 300dpi when I open it ....... also when I save it out after opening it in CPT it comes back 300dpi........so it wont open in jpeg change to 300dpi and save like that .....I have to save it in cpt reopen and then save in jpeg......... odd!
Oh and yes Harry I got all updates.
JPEG Files can contain EXIF data. This data may affect how the files open.
i.e. if the file EXIF information contained in file then file is opened in its original size/resolution
One way is to open file (with EXIF information, e.g. photo from camera) copy layer into new file and then resample and save (no EXIF information in file) and file will reopen in new size/resolution (tested on XP SP2, CDGS X5 SP2)
Best regards,
Mek
David the source was a canon D5..... .The trouble with saving it to another file is what about if i want to do a batch of them .... i normally copie from CF card to comp then make copies to a new folder then do a batch to a smaller size but still want the quality .
mike Rawlinson said:David the source was a canon D5.....
Ok not to be critical but to make sure you understand the facts. A first generation JPG file resaved again as a JPG file loses quality. I get them all the time if I want a batch I save them to CPT and resize to JPG keeping all my archived files onthe server as CPT files.
JPG compression is lossy!
So when I off load from my camera it comes in as a jpg...... then I should save to CPT ?...... But if its already a jpg the quality will not be as good as say TIFF......... can i save from the camera to TIFF ?.......maybe i should shoot everything in RAW.....is that an option ?
Now I'm really confused to be honest .....
David let me get this right .....your saying if I save first generation to CPT it will be the best I will get ....
Foster I'm not sure what you mean .
Why would a canon D5 generate such a poor format photo ...... or am I way off the mark.
BTW i'm only thinking of photos going to print NOT web .
Thanks for all the info......... not sure I understand some of it but it all helps me make a choice.
mike Rawlinson said:maybe i should shoot everything in RAW.....is that an option ?
Depends on your camera. Canon SLRs give you the choice -- jpg only, raw (CR2) only or both.
I usually keep the original RAW for anything important.
mike Rawlinson said:David let me get this right .....your saying if I save first generation to CPT it will be the best I will get ....
First off the file you get from the camera is the original, JPG file format uses a LOSSY compression, that means that you lose some date everytime you resave as JPG file format.
So if your camera only gives you JPG resave the file as CPT or TIF something that uses no compression or that uses LOSSLESS (no data loss) compression.
mike Rawlinson said:Why would a canon D5 generate such a poor format photo ...... or am I way off the mark.
JPG was settled as the default because when this was done systems had little storage spaced or power.
OK the RAW format: RAW file processing and color management are much like a mosaic, the more pieces of it you have the more you get the full picture. I cover this in my CorelDRAW color management book at www.graphictechnology.com, my recent (9/29/2011) CM webinar I did for Corel should be posted on their site in a day or two. In reality you cannot seperate color management from anything and if you process RAW you had better have your color management ducks in a row.
I know I'm going to catch crap for posting this but I cannot stear you wrong, 85% of what your hear or read about processing RAW files is done by those who have little or no understanding of color management and therefore is wrong. With that said if you get your act together with a color managed system ONLY USE RAW, no kidding it's that good.
Ok the basics, control the ambient conditions around your display, (light the room with 5,000 kelvin, have shades to control the light from outdoors), you can go crazy here and paint the room neutral gray and put shades on the monitor, (it's up to you how critical you want this but it all has value) use an EYE ONE or similar device to calibrate your display ( about $150 to $400) and regularly update the display profile. Place a RIP driven calibrated postscript print device on line for proofing, (about $3,000 minimum).
You can get by and get decent work with, the lights in the room, about $300 for the display calibrator and some shades. A full professional system like mine that calibrates the display and prints will set you back about $17,000, which includes the printer.
After you get the shades, lights and calibration device working, RAW is repeatable and reliable. Here's why you need the minimum I mentioned. RAW files have no color they are the RAW grayscale captures from the Bayer capture pattern, ( red only , green only and blue only, twice as many green sensors) they produce three grayscale data streams that the RAW converter converts to RGB. So you need to select the RGB color space to convert the RAW file to and adjust the conversion yourself. Can you imagine converting with a laptop or some uncalibrated system? Well that's what 95% of those who rave about RAW conversion really do!
I in conscience could not offer any advice to people until I ponied up the bucks for the full system and saw the real potiential, it helped that I am in the print business and need the proofing system but because of that I also resalized how much BS was being spread around about RAW.
A good camera and photographer with TIF files can do 95% or more of what people with minimum calibration can get from RAW. In my experience 99% of those who use RAW use it incorrectly and use it to compensate for bad photography and captures, because the RAW converter gives you extensive tools for fixing bad captures, it's real benefit!
I suggest converting RAW to the ProPhoto RGB color space 48 bit and archive as a CPT file as only Corel Photo-PAINT is a true 48 bit application and in a few years your current RAW format may not be supported. Photoshop and TIF use 14 bit color check out Bruce Lindblooms site he forgot more about color then most know.
I am in the process of writing a new color management book (18 months away) that will concentrate more on work flows.