Rob, KC8RCO, sent me an article from the July 2007 issue of Popular Communications in which Bill, N3AVY, proposes to send pictures via CW. CW is the original digital mode after all, isn’t it?
It is an amusing idea. I would suggest, though, that he start with a small image, such as the small ARRL icon. The .ico format uses only 16 colors, meaning that the colors require only four bits, and that each byte contains the information for two pixels.
The ARRL icon is only 766 bytes, meaning he’ll have to send 1,532 characters after encoding the binary data as ASCII. After he’s successfully sent and received the .ico image, then he could move on to something more complex.
does his brain contains any sort of CRC?
73,
Felipe
Interesting idea, but why send a raster image? Let’s send a vector image in Adobe Illustrator format, for example, it’s mostly text already. :)
I’d guess that vector encoding would be shorter for some images and longer for others. Right?
Hi Dan,
always wanted to do that, but couldn’t find anyone willing to listen to HEX-numbers for half an hour.
I used such on an interim basis for my small toys e,g a passive, RF supplied device with a crude ‘camera’ (35×35 BW), before I found a way to let it do SSTV via load modulation.
Here someone went even further: https://www.youtube.com/watch?v=Z2HvJp-KPD4
Imagine, a short video. He would have my respect if done the good old way :-)
73
Peter/DL3PB
For those who like both a challenge and need some copy practice it certainly is quite appealing to see an image being rendered from copied code!
I would definitely copy using a keyboard to avoid transcribing,
I would also agree its one of those do once in your life activities. I remember when I sent an image via 1200 baud packet radio on 2 meters with two HTS, 5 watts attached to 2 homemade jpoles over 10 miles. I chose a tiny 5k jpg image of Johnny Sako’s flying robot. That was a thrill seeing it on the other end after about a good hour of packets!