Photo that deleted at memoy card/digital camera can restore back?

You can get back deleted pictures from memory card with photo recovery software. download the best photo recovery software from
http://www.asoftech.com/apr/

If a file is deleted and is not written by further data, then the file has actually been there. You can check out
http://www.any-data-recovery.com/topics/photo/restore-deleted-photos.html
to restore deleted photos in memory card.
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Yes, you can but you need rely on some photo recovery software. I advise you to use the Vibosoft Card Data Recovery.

How to Recover Photos from Camera Memory Card

Yes, they can be recovered with photo recovery software provided not overwritten, here are some programs you may rely on. Both programs can also recover videos and music.

Photo Recovery (for Windows)
Mac Photo Recovery (for Mac OS X)

Note: Before your photos are recovered, do not attempt to save more files to the camera memory card in case the original files(your photos) are overwritten. Regards

In your case, you've better directly restore these deleted photos back from this memory card.
What you should do is really simple:
Step1. Stop using this camera memory card in case that any new file would rewrite your original data.
Step2. Insert this camera memory card to your computer.
Step3. Download a photo recovery freeware to your computer and start to retrieve all your lost data back:
http://micro-sd-card-recover.blogspot.com/2013/11/recover-photos-from-Micro-sd-card.html
In fact, this freeware has ever successfully saved all the inaccessible data of my friend off from his camera memory card. So, I believe it can also work successfully on your card, too.
Read more information of this freeware here:
http://www.4cardrecovery.com/
Step4. Save and back up all the restored data on a different memory card or drive in case of data recovery failure.

It is definitely that you can recover deleted photos from Canon PowerShot memory card as long as you do not use the memory card to take any new files after deleting the photos. To check if you can recover deleted photos from Canon PowerShot internal memory, you can connect your camera directly to the comupter, if the internal memory card can mount as a removable disk in computer, then you can use photo recovery software to scan the internal memory drive for deleted photos.

Hetman Photo Recovery will help you in just a few steps to recover deleted photos. Using the preview feature, you can find and select only the necessary frames and is guaranteed to recover deleted photos.
With the Hetman Photo Recovery can recover RAW files used in modern digital cameras. Photo recovery software will retain the original names, folder structure and all the information you need for working with RAW files.

Unlike traditional data recovery software, photo recovery software will search among all the deleted files only necessary - photos taken. Now will not have to wait until a full disk scan, which always takes a very long time, and then another and search for the desired photo to all deleted files.
Often recover only need one or two pictures and spend a lot of time would be just foolish. You can download the Hetman Photo Recovery and try it in action for free: http://hetmanrecovery.com/.
Program features:
· Restore digital images of any format (*.cr2, *.crw, *.jpeg, *.jpg, * .CDR, *.psd, *.bmp, *.tif, * .TIFF, *.raw, *.nef, *.pef, *.x3f, ...);
· Photo recovery after formatting memory card cleaning cameras or mobile phones (Microsd, Sandisk, SD, xD, Compact Flash, Micro Drive, Memory Stick, MultiMedia Card, PC Card, Secure Digital, SmartMedia, xD-Picture Card etc.);
· Recover photos lost after formatting the hard drive, an external drive (Transcend, Western Digital, Sony, etc.), a failure of the camera or Usb flash (Adata, Corsair, Kingmax, Kingston Datatraveler, Pqi, Silicon Power, etc.);

You can retrieve deleted pictures from a memory card with recovery software. you can find a variety of reliable software on "download.com" by simply searching for recovery software. however i know that this camera does not have internal memory. it even comes with a 16mb SD card when you first buy the camera. And it does not have the capability to recover deleted pictures from the menu list. i sold this camera and am very familiar with it.