A better way to produce 400x240 1-bit images

Library of images to use as OFFIMG screens on the DM41X and DM42
Forum rules
Do you have a creative streak? Post your OFFIMG photos here.

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 :)
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ijabbott
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Re: A better way to produce 400x240 1-bit images

Post by ijabbott »

rudi wrote:
Thu Nov 04, 2021 11:16 am
Edit:
Just realized, that the image files must be 2 bpp bmp files, they are here:
Actually, they need to be 1 bpp.

Experimenting with adjustments to the brightness and contrast before dithering usually helps.
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rudi
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Re: A better way to produce 400x240 1-bit images

Post by rudi »

Yes offcourse, you're right. 1 bpp / 2 colors ;-)
Btw - I found HyperDither for Windows, but a bit uphill to get it running, so I let it be and used the online resource.
/Rudi

DM-42 (s/n 06999), HP-42S, HP-35s, HP-11c, HP-32SII (ex HP-41CV, ex HP-75C, ex HP-48G + a lot, really lot of a accessories)
Denmark
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48GX
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Re: A better way to produce 400x240 1-bit images

Post by 48GX »

Anyone know why hyoerdither doesn’t convert to a 1-bit bmp file? That seemed to be glaring feature miss.
Waiting for SM to release DM42 hardware with one additional row of keys.
DM42, DB48X, DM32, HP42s, DM41X, HP35s, DM41L
Raising a next generation RPN/RPL user.
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48GX
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Re: A better way to produce 400x240 1-bit images

Post by 48GX »

Anyone have a link to the original bounds-union image?
Waiting for SM to release DM42 hardware with one additional row of keys.
DM42, DB48X, DM32, HP42s, DM41X, HP35s, DM41L
Raising a next generation RPN/RPL user.
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