M92: 16 level gray-scales image distortion - Page 2

Source · 08-29-2012, 12:00 PM

Quote:

Originally Posted by guidol

For converting Pictures to a e-ink Reader there is a nice page about the topic:
http://www.ebookworm.us/2011/05/31/d...-saver-images/

And here is a 16-Gray-PlugIn for GIMP:
http://www.ebookworm.us/wp-content/u...aysSixteen.zip

Thanks Guidol for the links.
I use Corel Photo-Paint X to manipulate images. It can convert color photos to different formats, bit resolutions, and dithering function is also available.

Mono · 08-29-2012, 02:03 PM

My screen waveform, which works well on my M92, is
110A_A039_97_WE2402_BTC.

Source · 08-29-2012, 02:06 PM

OK, I have performed the patching process described in the links that Booxtor provided. There is good news and bad news.

The good one is that the patching process is not that complicated as it appears (due to confusing instructions magnified by the poor machine translation of google). If someone is interested in clear instructions I can put one together, but the bad news is that it is not worth the bother. Not because it is something only geeks can perform, and not because it would spoil the M92, but because the improvement is not good enough.

Now after the patching there are 16 clearly recognizable different shades of gray, but the distribution is still not smooth and linear. With other words, there is still a sharp darkening between the 11th and 12th shades; the difference between the 12th and 13th is hardly recognizable, while there is again a more prominent jump from 13th to 14th.

The result is that the mentioned photo distortions are still present.

The patching process is also slightly different than demonstrated in the tutorial video. After clicking the MfgTool Start button one can see the progress of the update for a while, until it arrives to the

"Jumping to OS image".

Then it suddenly stops with an error message:

Updater Error 0xffff0000 (-65536) -

First I thought we have got a problem here, because the M92 was frozen and could not turn it on. But after pressing the reset button it works now again. Seeing the error message I thought that the patching was unsuccessful, but it has still performed some changes, because the shade distribution improved somewhat. Oddly enough, the Screen Waveform ID didn't change.

Conclusion is that we still have to wait for a new update or patch that would provide a decent linear gray-scale distribution.

janek · 08-31-2012, 02:43 AM

Quote:

Originally Posted by Source

OK, I have performed the patching process described in the links that Booxtor provided. There is good news and bad news.

This case is btw, quite interesting because of other possibilities it opens. This utility comes with complete "hardware-level" firmware. So it allows for replacing the original bootloader - which in some distributions is modified to prevent users from installing firmware from other distributions...
So it allows one to install arbitrary firmware...
So it might allow to install various branches of firmware on readers purchased from various sources. Not that I advocate this... there are indeed good technical and ethical reasons not to do this. But it is interesting.

Source · 08-31-2012, 04:01 AM

Quote:

Originally Posted by janek

...
So it allows one to install arbitrary firmware...

Interesting idea. I for myself would like to install third party TTS programs, but to do so one supposed to know Linux and also the M92 firmware which is not my specialty.

But of course, if some experts perform the hack and issue a patch similar to the one for the grey-scale, then sure we can apply it.

Booxtor · 08-31-2012, 05:06 AM

Quote:

Originally Posted by janek

This case is btw, quite interesting because of other possibilities it opens. This utility comes with complete "hardware-level" firmware. So it allows for replacing the original bootloader - which in some distributions is modified to prevent users from installing firmware from other distributions...
So it allows one to install arbitrary firmware...
So it might allow to install various branches of firmware on readers purchased from various sources. Not that I advocate this... there are indeed good technical and ethical reasons not to do this. But it is interesting.

jbsavitz · 09-03-2012, 04:22 PM

Booxtor, can you let us know if the firmware update will include one for the i62HD which will fix the WiFi connection with the hidden SSID? This fix is available in other versions of the M92 firmware and should be portable to the i62HD.

Booxtor · 09-04-2012, 06:01 AM

Quote:

Originally Posted by jbsavitz

Booxtor, can you let us know if the firmware update will include one for the i62HD which will fix the WiFi connection with the hidden SSID? This fix is available in other versions of the M92 firmware and should be portable to the i62HD.

Yes, I take care of it.

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08-29-2012, 02:03 PM	#17
Mono Mono Posts: 699 Karma: 13333 Join Date: Jan 2012 Device: Boox M92	My screen waveform, which works well on my M92, is 110A_A039_97_WE2402_BTC.

08-29-2012, 02:06 PM	#18
Source M92 User Posts: 12 Karma: 10 Join Date: Jul 2012 Device: Onyx Boox M92	OK, I have performed the patching process described in the links that Booxtor provided. There is good news and bad news. The good one is that the patching process is not that complicated as it appears (due to confusing instructions magnified by the poor machine translation of google). If someone is interested in clear instructions I can put one together, but the bad news is that it is not worth the bother. Not because it is something only geeks can perform, and not because it would spoil the M92, but because the improvement is not good enough. Now after the patching there are 16 clearly recognizable different shades of gray, but the distribution is still not smooth and linear. With other words, there is still a sharp darkening between the 11th and 12th shades; the difference between the 12th and 13th is hardly recognizable, while there is again a more prominent jump from 13th to 14th. The result is that the mentioned photo distortions are still present. The patching process is also slightly different than demonstrated in the tutorial video. After clicking the MfgTool Start button one can see the progress of the update for a while, until it arrives to the "Jumping to OS image". Then it suddenly stops with an error message: Updater Error 0xffff0000 (-65536) - First I thought we have got a problem here, because the M92 was frozen and could not turn it on. But after pressing the reset button it works now again. Seeing the error message I thought that the patching was unsuccessful, but it has still performed some changes, because the shade distribution improved somewhat. Oddly enough, the Screen Waveform ID didn't change. Conclusion is that we still have to wait for a new update or patch that would provide a decent linear gray-scale distribution.

09-03-2012, 04:22 PM	#22
jbsavitz Connoisseur Posts: 73 Karma: 530904 Join Date: Apr 2011 Device: Sony PRS-950, Onyx Boox M92 and i62HD	Booxtor, can you let us know if the firmware update will include one for the i62HD which will fix the WiFi connection with the hidden SSID? This fix is available in other versions of the M92 firmware and should be portable to the i62HD.

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