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Re: A few to get you started

Posted: Tue Feb 13, 2018 7:58 pm
by toml_12953
dlachieze wrote:
Tue Feb 13, 2018 7:47 pm
Changing ?dl=0 to ?raw=1 at the end of the Dropbox URL:

Image
How did you get a picture of my wife and me out for a Sunday drive? :D

Re: A few to get you started

Posted: Wed Feb 14, 2018 1:28 am
by rprosperi
dlachieze wrote:
Tue Feb 13, 2018 7:47 pm
Changing ?dl=0 to ?raw=1 at the end of the Dropbox URL:
@Didier - Nice trick, how on earth did you discover that?

Re: A few to get you started

Posted: Wed Feb 14, 2018 5:40 am
by dlachieze
rprosperi wrote:
Wed Feb 14, 2018 1:28 am
@Didier - Nice trick, how on earth did you discover that?
With Google, here.

Re: A few to get you started

Posted: Wed Feb 14, 2018 2:46 pm
by rprosperi
dlachieze wrote:
Wed Feb 14, 2018 5:40 am
rprosperi wrote:
Wed Feb 14, 2018 1:28 am
@Didier - Nice trick, how on earth did you discover that?
With Google, here.
Thanks very much, a useful tip. Be nice to know analogous tricks for G-drive and One-Drive.

Need help with DM42 pictures

Posted: Thu Mar 08, 2018 3:32 am
by dlomshek
As I don't even have a system using Windows NT what else can I use to produce OFFIMG pictures of Windows-NT.bmt of 400 x 200 pixels and 1 bit color depth?

dlomshek

Re: Need help with DM42 pictures

Posted: Thu Mar 08, 2018 6:23 am
by Walter
dlomshek wrote:
Thu Mar 08, 2018 3:32 am
As I don't even have a system using Windows NT what else can I use to produce OFFIMG pictures of Windows-NT.bmt of 400 x 200 pixels and 1 bit color depth?
AFAIK you can use PAINT (available on each and every Windows PC) and store your file as monochrome .BMP.

HTH

Re: Need help with DM42 pictures

Posted: Thu Mar 08, 2018 8:59 am
by toml_12953
Walter wrote:
Thu Mar 08, 2018 6:23 am
dlomshek wrote:
Thu Mar 08, 2018 3:32 am
As I don't even have a system using Windows NT what else can I use to produce OFFIMG pictures of Windows-NT.bmt of 400 x 200 pixels and 1 bit color depth?
AFAIK you can use PAINT (available on each and every Windows PC) and store your file as monochrome .BMP.

HTH
Paint has no dithering. You'll get just black and white patches.

Re: Need help with DM42 pictures

Posted: Thu Mar 08, 2018 9:25 am
by Walter
toml_12953 wrote:
Thu Mar 08, 2018 8:59 am
Walter wrote:
Thu Mar 08, 2018 6:23 am
dlomshek wrote:
Thu Mar 08, 2018 3:32 am
As I don't even have a system using Windows NT what else can I use to produce OFFIMG pictures of Windows-NT.bmt of 400 x 200 pixels and 1 bit color depth?
AFAIK you can use PAINT (available on each and every Windows PC) and store your file as monochrome .BMP.

HTH
Paint has no dithering. You'll get just black and white patches.
Sorry I didn't recognize your unwritten wish ;) But I faintly remember someone wrote about this topic on this forum, IIRC. Maybe worthwhile searching ...

Re: Need help with DM42 pictures

Posted: Thu Mar 08, 2018 12:11 pm
by grsbanks
toml_12953 wrote:
Thu Mar 08, 2018 8:59 am
Paint has no dithering. You'll get just black and white patches.
I've always used the GIMP

Start by converting to greyscale at the required resolution of 400x240, then convert to 1-bit depth with Floyd-Steinberg dithering and you'll get pretty good results.

Re: Need help with DM42 pictures

Posted: Thu Mar 08, 2018 2:13 pm
by Jeff O.
grsbanks wrote:
Thu Mar 08, 2018 12:11 pm
I've always used the GIMP

Start by converting to greyscale at the required resolution of 400x240, then convert to 1-bit depth with Floyd-Steinberg dithering and you'll get pretty good results.
So it is best to convert to grayscale before converting to 1-bit depth? I tend to start with whatever image cropped (or sometimes padded) to the correct aspect ratio of 1.667:1. Then open in GIMP and scale to 400x240. Then I try the conversion to 1-bit (using Image->Index->Convert Image to Indexed Colors, select “Use black and white (1-bit) palette” with Floyd-Steinberg dithering). This of course converts a color image to black and white. If that looks good, I export to a bmp. More often than not, I undo the conversion, then mess with contrast and brightness in the color tools and try again. I do that a few times until I am satisfied, then export. I have not found a magic formula for adjusting the brightness and contrast to produce the best results. Sometimes I then open in paint to remove excess speckles from areas that are supposed to be totally black or otherwise touch things up. Finally copy to DM42 OFFIMG folder.

All in all, I probably take this much too seriously!