JerrysPhotos Loc: Arkansas

I need to send a photo to someone and it can not be any larger than 127kb. How can I tell the true size of a photo?

I just checked on one of my photos using PSE 10 and when I view the properties in Organizer it says the size is 23MB. When I open the same photo in Editor and check the size, it says the size is 41.5MB. I don't understand why there is any difference and especially such a big difference.

Why is there a difference in the sizes of the same photo?

I need to keep the photo size as large as possible without making it more than 127kb. Which size should I use when determining the size of a photograph?

Thanks for your help.

Jerry

jeryh Loc: Oxfordshire UK

It depends on how you are sending the photo; if it is via Email, then you have to consider bandwidth- if the photo is bigger than 10X8" you might have a problem. I found that if I send anything to the USA from UK, anything bigger than 6X4" is rejected by the ISP. under that size, no problem; plus always send it as a JPEG. The easy rule of thumb for phot sizing is just use
the old system Inches by inches, saves a lot of hassle !

GrahamS Loc: Hertfordshire, U.K

First of all, print sizes have no bearing on the file size for web transmission. All that matters is the total pixel count, and after jpg compression, the file size in Mb.

What you are comparing is the size of a compressed Jpg file before it is opened or de-compressed, and the size of the same file after it is opened. The degree of Jpg compression, set when the file was originally saved either by the camera or in software, will dictate the difference.

JerrysPhotos Loc: Arkansas

I still do not understand why there is a difference in the size. Since it is a RAW DNG file, I did not think it was compressed at all.

I will save it and send it as a jpeg after I PP it. I guess I just need to find out if the 127kb limit is with it compressed or when it is opened.

Thanks for the help.

jeep_daddy Loc: Prescott AZ

Actually I'm not sure what they mean. What are you using it for? Is it for an avatar?

Image>
Resize>
Image Size>
Pixel Dimensions area from pixels to percent and check the Resample Image box and then change percent to 5 or 6 percent and watch the Pixel Dimensions change to the kb you are looking for.

JerrysPhotos Loc: Arkansas

It is going to be used in an E-Book and if it is more than 127kb, then Amazon will change it themselves and if they do it, then who knows what the end result will look like.......

jeep_daddy Loc: Prescott AZ

At that size restriction it will look like crap anyway. That is very small.

DaveMM Loc: Port Elizabeth, South Africa

I have done some experiments with an image from my T2i with an 18 MPixel sensor which produces RAW image files varying between 20 and 29MB. When the file is processed by ACR and opened in PSE 11 Editor it is a TIFF file (See File>File Info and on the description tab it shows the format as image/tiff). This would need 54MB for a 8bit depth per channel image (18MB * 8 bits * 3 channels).

I saved the image as a lossless TIFF. I then checked on how much compression could be done on these files by zipping both it and the RAW file. The TIFF reduced from 52.5MB to 27.8MB but the RAW hardly reduced in size, from 20.4MB to 19.7MB. It is obvious that the camera has already compressed the RAW (losslessly).

I think that the way Amazon want the size reduced is to be a low pixel count image for web display. Reduce it to about 800 * 600, which you can do in Editor and Save As or else it can be done in Organiser by File>Export as New File(s), select File Type as JPEG and reduce the size before saving it somewhere on your HDD. For a web picture the image will look quite acceptable.

JerrysPhotos Loc: Arkansas

Thanks for the help with this. I will try doing that and see how it works..... I am also going to check again on the size because 127kb just seems to small to really be good for much of anything..........