A few to get you started

Library of images to use as OFFIMG screens on the DM42
Forum rules
Do you have a creative streak? Post your OFFIMG photos here.

Please avoid using this forum to host them. Wherever possible, please use third-party hosting for your images, place them in a publicly accessible location and link to them on this forum. This third-party hosting can be your own server if you have one or a service such as PhotoBucket, DropBox or others.

Images MUST be in Windows-NT .bmp format at a resolution of 400x240 pixels and 1-bit colour depth or they will not be displayed by the DM42. Images that do not meet this requirement will be removed from the forum :)
toml_12953
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Re: A few to get you started

Post by toml_12953 » Tue Feb 13, 2018 7:58 pm

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
Tom L

¡spuǝıɹɟ uɐılɐɹʇsnɐ ʎɯ llɐ oʇ ıH
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rprosperi
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Re: A few to get you started

Post by rprosperi » Wed Feb 14, 2018 1:28 am

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?
--bob p

DM42: β00071 & 00282

dlachieze
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Re: A few to get you started

Post by dlachieze » 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.
DM42 SN: 00425

rprosperi
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Re: A few to get you started

Post by rprosperi » Wed Feb 14, 2018 2:46 pm

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.
--bob p

DM42: β00071 & 00282

dlomshek
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Need help with DM42 pictures

Post by dlomshek » 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?

dlomshek

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Walter
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Re: Need help with DM42 pictures

Post by Walter » 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
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HP-35, HP-45, ..., HP-50, WP 34S, WP 31S, DM16L

toml_12953
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Re: Need help with DM42 pictures

Post by toml_12953 » 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.
Tom L

¡spuǝıɹɟ uɐılɐɹʇsnɐ ʎɯ llɐ oʇ ıH
DM42 SN: 00025 (Beta)
SN: 00221 (Shipping)

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Walter
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Re: Need help with DM42 pictures

Post by Walter » Thu Mar 08, 2018 9:25 am

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 ...
DM42 SN: 00041 --- Follower of Platon.

HP-35, HP-45, ..., HP-50, WP 34S, WP 31S, DM16L

grsbanks
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Re: Need help with DM42 pictures

Post by grsbanks » Thu Mar 08, 2018 12:11 pm

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.
Not SwissMicros staff, just an enthusiast.

Jeff O.
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Re: Need help with DM42 pictures

Post by Jeff O. » Thu Mar 08, 2018 2:13 pm

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!

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