Amiga.org
Amiga computer related discussion => General chat about Amiga topics => Topic started by: Rowbeartoe on July 30, 2008, 08:42:47 AM
-
Ok, someone finally helped me find these old Digi-View pictures. Apparently I ran into them too a while back but couldn't display them so I had no idea I had them. The original Digiview format will not work with my verison of XNVIEW (1.61) or old PaintPro 5.0. These programs normally display HAM and IFF pictures. My question is what PC program can I use to convert the old Digiview files to normal Amiga HAM6 files such as LBM or IFF? I read somewhere about these pictures needing Pixmate to convert old Digiview. I also read about the files being RAW and to convert them to FBN or something?
Help! I have the pictures, but can I display them on the PC?
Thanks.
-
Why don't you convert them with your Amiga in i.e JPEG and then display them on your PC ?
I've done this several years ago, i don't remember exactly the program I used
Another solution : on your PC, display pictures on UAE then grab the screen !
-
If he's going to go to the trouble of loading up UAE, he might as well also run an Amiga converty thing.
-
AdPro had a ton of file conversion formats that it could load and save to and from. Do you have the last version of it for your Amiga? I think it was version 2.5.
-
@Rowbeartoe
After all that effort to find these pictures, you should put them Amiga.org's gallery so we can all see them, and they don't get lost again.
-
JPG sucks so I will never convert anything to JPG. BMP, PNG, or TGA keeps pictures identical to the original. As far as using my AMIGA, I'm still in the processes of learning how to exchange files between the PC and my real Amiga. Currently the PC is the fastest way for me to convert and save Amiga pictures.
I think once I get these pictures, I'll put them in the Gallery- Call it the NewTek collection or something. I have a lot thanks to Digipaint and the Newtek demo reels. And someone also helped me get that DynamicHiRes picture in PNG format to share as well from Demoreel 3. =)
-
>by Rowbeartoe on 2008/7/30 12:11:41
>JPG sucks so I will never convert anything to JPG. BMP, PNG, or TGA keeps pictures identical to the original.
I also avoid JPG. However, you'll be amazed to see how many people are in illusion thinking JPG does not distort the original image especially after repeated editing. And I have no idea why some people think digital cameras that use the lossy JPG are better than analog cameras in resolution. They are higher in price but not in resolution.
It's okay to use lossy algorithms if you know what you are losing (like going from 8-bit/primary to 4-bits), but you probably need PHD in math to understand what you actually lost when you converted from GIF/PNG to JPG.
-
@Rowbeartoe
You could try IffPro... It comes from an Amiga user who I knew from when I used DarkBASIC... has support for:
- IFF Images (OCS) (0-32 colours)
- IFF Images (AGA) (0-255 colours)
- IFF Ham 6 (4096 Colours)
- IFF Ham8 ( 262144 (2^18) Colours)
- IFF Half Bright (ocs + aga)
- IFF Dynamic Hires (4096 colours, Split Scan lines)
- IFF Slice/ Dynamic HAM6 (SHAM)
And link to the download/feature page:
http://underwaredesign.com/prod_detail.php?id=25
Basically you can convert any Amiga IFF image -> BMP, so no detail is lost... You could then use MS Paint to save as a .PNG, .JPG etc, although i'd reccomend a lossless format like PNG...
:-)
-
Best way for anyone to really see what JPG does to a picture is to have them save an Amiga HAM6 picture to JPG and then have the computer count the colors. Hahaha- it's amazing. Best example, the dynamic hires picture called "the look" from the Newtek demoreel 3 has 65 colors. I saved it to a default JPG setting and now have 35809! From a 4096 color Amiga. Hahaha- WTF?
Avoid JPG EVERYONE! BTW- I hate all MPGs too!
I have had problems with GIF too because I think its palette is only 262,144? Not sure of the specifics but remember having a problem converting a 32 or 16 color picture from the Amiga or Atari ST. The 256 color gif image kept on dithering some of the colors. WTF? Hahahaha. Isn't 262,144 enough to copy the Amiga or ST?
-
I will not avoid jpg - because I know what I am doing.
-
Not sure if this will work in your case as I dont have the relevant image type to try and process, but Irfanview (http://www.irfanview.com/) can read and output in pretty much any format you wish to throw at it and has a heap of plugins too as well as batch conversions etc :)
-
poo pooing on jpg format is inane. There is a time and a place for jpg, and obviously you don't do multiple edits on that format. It's also obvious you don't convert low color images to that format if you want it to look good. Consumer cameras save to jpg because people can't see the difference in their pictures between raw because consumer cams don't have the quality for raw to make a difference anyway.
Obviously you do your editing in a lossless format, and when you're done you publish in a lossy format unless your image is line art, screen shots or low color pix of crap you scraped off your amiga. That pic of the beach during sunset is going to look the same to people whether it's a tiff or a jpg, most of human vision is stuff being just plain made up in the viewers brain. This is why people use JPG, the result is about the same and it takes up a lot less bandwidth.
Every file format has it's time and place.
-
Umm I wasn't poo-pooing it...
Just saying that its best to save those converted HAM images as a PNG unless you want to mess them up... ;-)
JPG is great for low quality screen grabs & pictures though. :-D
-
Not directed at you DBAlex, just a general comment. :-)
-
>poo pooing on jpg format is inane. There is a time and a place for jpg, and obviously you don't do multiple edits on that format. It's also obvious you don't convert low color images to that format if you want it to look good.
The general consumer does not know the technical details of where to avoid JPGs. I have seen some medical people using JPGs of medical imagery.
>Consumer cameras save to jpg because people can't see the difference in their pictures between raw because consumer cams don't have the quality for raw to make a difference anyway.
Yes, they do. It's better to have a digital camera save to lossless format than lossy JPG. There was a time and place when you couldn't because memory was expensive, but now they should avoid lossy algorithms. Most consumers can't tell the difference between an 800*600 image interpolated to 1024*768 and an original 1024*768 but still the 1024*768 is better.
>Obviously you do your editing in a lossless format, and when you're done you publish in a lossy format unless your image is line art, screen shots or low color pix of crap you scraped off your amiga.
Some things don't require 24-bit RGB like cartoons or even hand-done paintings but that does not make them "crap".
>That pic of the beach during sunset is going to look the same to people whether it's a tiff or a jpg, most of human vision is stuff being just plain made up in the viewers brain. This is why people use JPG, the result is about the same and it takes up a lot less bandwidth.
That same sunset in 24-bit lossless compressed format is better than JPG. Would you archive a Mona Lisa in JPG or lossless compression? And you can also subsample the color space 4:1 in each axes and interpolate it with luminance and get an image which human vision can hardly distinguish from the original. And if you can losslessly compress the luminance and chrominance after delta-modulation, you get more than 8:1 compression easily and you know exactly what you have lost rather than doing a discrete cosine transform and quantizing the coefficients and not knowing what you lost in the spatial domain.
-
@ Rowbeartoe
I'm a little unclear of your intentions. Are you going to upload the images in their original format or after you have converted them to the format of your choice?
Amiga.org may or may not want the original formats but the original images (if not the demo disks) should be preserved somewhere.
-
I'm going to upload them in PNG format. Unless I'm mistaken this should keep the pictures looking identicle? I will be uploading my NewTek collection soon. Another request I was asked for recently was a Sachs collection in the original formats. Most of mine are in GIF format. Can anyone make a Sachs collection?
Thanks EVERYONE and great topic about JPG too! =)
-
http://www.atari-forum.com/viewtopic.php?f=80&t=14448
The above link is to an Atar ST Forum that I used to upload the NewTek collection of Amiga pictures in PNG format. I had a hard time uploading them to Aminet- so perhaps someone here can upload them with better success than I had.
It's a great collection with pictures ranging from 320x200 HAM6 to overscan highres 4096 color dynamic HiRes. 1986-1990. All pictures could be displayed on the Original Amiga OSC. =)
Thanks everyone for your help. =)