compression of images

[Rick F]

My question : I took about 100 pictures and I want to be able to compress all of the pictures at one time is this possible with photo impact 10 Thanks RF

[heinz-oz]

No, not all at once. You may however be able to create a batch task to do it.

[wolverine]

My question : I took about 100 pictures and I want to be able to compress all of the pictures at one time is this possible with photo impact 10 Thanks RF

You can create a batch application using just the save function.

Open a file that you can delete later. Start the batch recorder.

Click 'save as' in the file menu. Select 'options' and change the compression level to the desired level and save the file. Stop the batch recorder.

Next hit the batch task button on the quick command panel.

Select your newly created save task. Select the folder and hit okay. PI wil do the rest.

The question in my mind is why you want to compress the files in the first place. Keep in mind you can only compress jpeg files and when you do you will degrade the quality of those files. If you want to make large prints 8x10s or larger you will not get the same quality print as you would from the original file if you go below 80% compression.

- W

[Rick F]

Thanks wolverine
My thought was to be able to compress all the images taken the images are large and transfer them to a CD to be sent to other friends , and then they in turn could expand the images for viewing. I do understand your saying it does reduce the quality to compress down to 50% etc. for printing, but what about just for viewing ?
My second question , Thanks for instructions you sent on how to create a batch application, but it is confusing to me Ist you say start the batch recorder ? There is no "save as" in the batch recorder? and I see no batch task button either ? I am sure i am doing something wrong ? Help Thanks RF

[heinz-oz]

Hi Rick,

on the right hand side, where your EP is located

[heinz-oz]

On a different thought: If you intend to put these images on a CD to send to friends, why do you want to compromise the quality by compressing them? How large is each image?

Jpeg images from my Canon EOS350D at 8MP fine setting come out around 4.5 MB per image on average. That would only be around 450 MB for 100 pictures. You can put more than that on a CD (700MB).

If you only want them to view these on a PC, you should still properly resize them (smaller frame size) and compress them slightly only. That will retain more of the quality than simple compression. Once you compress a jpeg image, the detail lost is really lost. You cannot uncompress that and go back to the same quality.

Just try it. Open a jpeg in WinExplorer (after you duplicate it) and save it again. Do that twice and look at the file size (before and after). Now open the smaller file size image and let me know if you still like what you see?

[J_fike]

Use an archive program like pkzip. It is "lossless" so you won't lose any detail in your pictures, but it will usually create an archive that is smaller than the sum total of the individual file sizes. You can also create the archive as an executable, which can simply be "double clicked" or run to expand the archive. Then your friends won't need pkzip to unzip the archive. You can also password protect the archive (for sensitive images.)

I happen to use Powerdesk Pro 6 (a Windows Explorer substitute) that has pkzip built in.

[Rick F]

Thanks to all of you , I will give it a try RF