As per what you say, you can take screenshots of your images, save them as any of the general image format like JPEG, PNG or TIFF and then follow the steps what Timmappa has stated. That way, you would get the information at your hand as editable document and can do whatever you want to do with it.
Remember while taking the screenshot, you have to adjust the screen of the image to that extent so that your content should be visible clearly and no unnecessary elements should get included in the frame. This is because, it would be easier for you to work on the text which is important to you. If other element gets included, the OCR tool will include them as well, and then it would be an added task for you to find them out and delete them.
Hope this works. Do let us know, if it doesn't.