![]() ![]()
Unless you can find a good copy of any corrupt file from a backup, there probably isn’t much you can do about these (trying to fix the image header with a hex editor to retrieve a corrupted image usually isn’t worth the effort). Depending on which conversion utility you use, it may stop if it encounters a corrupt file or may just log the problem and carry on converting. Inspect a few sample images to see how much bigger or smaller the converted files are than the originals, and then use that ratio to estimate how much extra storage space you’ll need. If you have tens of thousands of old PCX files you may need to leave the batch conversion running overnight, but so long as you don’t run out of disk space you’re unlikely to have any problems. Most batch converters will happily search down through subfolders to find images to convert, and put the converted files alongside the original image or in another folder if you’d prefer. BATCH IMAGE CONVERTER PCX TO PNG ARCHIVEOnce you’ve converted all your PCX files, which takes only a few seconds per file, you can archive all the original PCX files to CD or DVD and then use the PNG files in their place. Convert PNG to JPG Using ‘ls’ and ‘xargs’ Commands The ls command allows you to list all your png images and xargs make it possible to build and execute a convert command from standard input to convert all. Commercial users should buy a licence for €10 per user, but there are discounts available for bulk purchases. There are many packages that can do this for you: IrfanView is one possibility that’s free for non-commercial use. Most image-editing packages that can read PCX files can write PNG and so are able to convert files from one format to the other, but if you have many files in the old format you’ll probably want to use a batch conversion routine to convert all the files in one operation. PNG is now the best lossless image format available for most applications, and is the default format used internally by Microsoft Office applications. The only feature PNG lacks compared to GIF is the ability to animate images. The PNG format was designed to replace GIF, and it has much greater colour depth (16 million colours), better transparency support (an 8-bit alpha channel, where GIF has only a single-bit alpha channel) and more efficient compression than GIF. It was also hobbled because for ten years (1994-2004) Unisys insisted that anyone who supported it within their application had to pay a licence fee to use the LZW (Lempel–Ziv–Welch) compression algorithm on which it relied. It was invented back in 1987 and so is stuck with a palette of just 256 colours.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |