Displaying 20 results from an estimated 2000 matches similar to: "NHW Project - compressibility of the .nhw files"
2018 Aug 22
0
NHW Project - very high compression settings
Hello,
I think I have nearly validated the -l8 "very high compression" setting, I
have started to work on -l9 setting, and I have just tested these ones
against x265 (HEVC), and on rather good quality images, they are very
competitive, that's not a joke!!! I have tested -l8 quality setting on 30
rather good quality images against x265, and on 20-22 images I prefer the
results of the
2018 Sep 25
0
NHW Project - improvement of -l8 high compression setting
Hello,
For those interested, I have improved -l8 high compression quality
setting.This setting is now better, more precision.Files are also a little
smaller and I don't have touched the entropy coding schemes, so we can
still save 2KB per .nhw compressed file.
More at: http://nhwcodec.blogspot.com/
I am also working on -l9 quality setting, but it is not ready for now,
notably as x265 (HEVC)
2018 Aug 17
2
NHW Project - new -l8 "very high compression" setting
Hello,
For those interested, I have added a -l8 "very high compression" setting to
the NHW Project.
I have added an experimental processing to remove details and preserve
neatness.I have also now a fast estimation of entropy of wavelet
coefficients and I use it accordingly to the image complexity but it is a
very first version... With these new processings, the entropy coding
schemes
2018 Nov 23
0
NHW Project - improvement of very high compression
Hello,
Just a quick message to let you know that I have improved very high
compression -l8, -l9, -l10 quality settings of the NHW Project.These
settings have now more precision and still a good neatness.This new version
is then better (and we can still save 2.5KB in average per .nhw compressed
file).
More at: http://nhwcodec.blogspot.com/
As usual, any feedback is very welcome!
Cheers,
Raphael
2018 Aug 19
0
NHW Project - new -l8 "very high compression" setting
Hello,
The -l8 "very high compression" setting I posted was not really good.Now I
have corrected and improved it, and now the -l8 quality setting is really
better, more precision and more neatness.
I think now it is a good setting, and I have started to compare it with
x265 and it can be now competitive.
More at: http://nhwcodec.blogspot.com/
Do not hesitate to test it and give me
2018 Jul 16
0
x265 and NHW comparison images posted to https://nhwcodec.blogspot.com/?
Hello Spork,
Thank you very much for your great help!
So ok, let's create a website for the NHW Project! Anyone who wants to help
is very welcome! Do you want we start first with wix.com or rather from
nearly scratch? I think from scratch would be better as we can really do
what we want, but it will be a lot and lot more difficult to make...
-I will send you a private email for the USB
2018 Jul 10
1
NHW Project - some update
You're welcome!
On Tue, Jul 10, 2018, 4:50 AM Raphael Canut <nhwcodec at gmail.com> wrote:
> Hello Dave,
>
> Thank you very much for your help!
>
> Cheers,
> Raphael
>
> 2018-07-10 9:39 GMT+02:00 Dave Johnson Games <davefilms.us at gmail.com>:
>
>> Let me do some looking.
>>
>> On Mon, Jul 9, 2018, 4:55 PM Raphael Canut <nhwcodec at
2018 Jul 10
0
NHW Project - some update
Hello Dave,
Thank you very much for your help!
Cheers,
Raphael
2018-07-10 9:39 GMT+02:00 Dave Johnson Games <davefilms.us at gmail.com>:
> Let me do some looking.
>
> On Mon, Jul 9, 2018, 4:55 PM Raphael Canut <nhwcodec at gmail.com> wrote:
>
>> Hello Dave!
>>
>> Thank you very much for your answer!
>>
>> You're right.I have thought
2018 Dec 10
0
NHW Project - good improvement of very high compression (-l8 to -l13 quality settings)
Hello,
Just a quick message to let you know that I have really improved very high
compression of the NHW Project
from -l8 to -l13 quality settings, and we can still save 2.5KB per .nhw
compressed file.
Actually I am new to very high compression, it is just 3 months that I am
working on it (I put on pause the NHW Project from August 2013 to February
2018 )... And I realize that very high
2018 Mar 10
0
NHW Project - lower quality settings
I don't mind at all. I imagine there are more people like me out
there who have been following your work, but haven't said anything.
I agree that a series of pages explaining how things work may lead to
more contributions. At the very least it would lead to more people
being better educated on how wavelets work in image compression. But,
this is your project, if you don't have the
2018 Jul 14
2
NHW Project - some results
Hello,
Just a quick message to let you know that I get back to NHW Project
currently.
I downloaded 20 images from the Internet with rather good quality (mainly
faces), I compressed them at high compression -l7 setting with the NHW
Project, and on 19 images out of 20, I visually prefer the results of NHW
compared to x265 (HEVC)!!! -I can make available these 20x3=60 512x512
24bit bitmap images
2021 Dec 02
1
NHW Project development
Raphael,
Some 15 years ago I implemented limited functionality Theora in our cameras FPGA (it took me 6 month of hard labor), and then gave up - it is a very crowded space and it is difficult to compete with more advanced codecs. And for our other work we anyway need almost raw image data, so we are using JPEG-based JP4 format (https://community.elphel.com/jp4) that we originally developed for
2021 Dec 02
1
NHW Project development
Hi Andrey,
Thank you for your answer.Actually, NHW is very low-power so I think it
could be geared toward any hardware.But actually I don't have hardware
skills, so NHW is not a real hardware project for now maybe? I agree with
you that it is extremely difficult (for me) to build a community around
NHW, I'm certainly very bad/underskilled at it.Any help is welcome!
Cheers,
Raphael
Le
2017 Sep 04
0
NHW Project - fast discrete wavelet transform
Hello,
I forgot in my last reply that my DWT implementation can be speed up, for
example I'm doing for now:
for (;_X1<_E_;_X1++,_RES+=2) //dilatation
{
_RES[0]=_X1[0]<<3;
_RES[1]=(_X1[1]+_X1[0])<<2;
}
then
for (;_X2<_E_;_X2++,_RES+=2) //details
{
_RES[0]-=(_X2[1]+_X2[0])<<1;
_RES[1]+=6*_X2[1]-_X2[2]-_X2[0];
2017 Oct 02
1
NHW Project - AOM AV1 comparison
Hi Silvia,
Thank you very much for your answer! Your opinion is much appreciated.
Your advice is wisdom, but very quickly to rectify or precise my situation,
I am finishing a 2-year job contract and there will maybe be a "vacation"
period before the next contract (if I find one), so I would like to invest
this time for the NHW Project, but that's right that image/video
compression,
2018 Apr 16
0
NHW Project - Linux
> How about macOS? Can you give us a build.
I don't have a macOS environment so I won't be able to give you a build.But
it would be also great to have a macOS version.I think now that many bugs
have been corrected, and that the NHW Project can compile ok under clang
and run ok on macOS.
If a forum member, that runs macOS, could give us a build and first let us
know if the code is ok,
2021 Dec 02
1
NHW Project development
Raphael,
I do not believe it is possible to build a viable community around most hardware projects except super-universal based on very cheap/high-volume products like Pi or Arduino. We see the commercial benefits of Free Software/Open Hardware as it adds value to the hardware as users are ready to pay extra for the Freedom.
Andrey
---- On Thu, 02 Dec 2021 12:59:34 -0700 Raphael Canut
2018 Feb 18
1
NHW Project - high compression -l4 setting
Hello,
For those interested, I have added a -l4 high compression setting to the
NHW codec ( http://nhwcodec.blogspot.com/ ).This setting is very
experimental, I have boosted the sharpness for this one, but it can lack of
precision on low contrast areas.
This setting still maintains a good neatness and when it will be validated,
I will then make a new 0.1.4 version for the NHW Project.
High
2018 Aug 04
0
NHW Project - Image comparison
Hello,
Could some of you take a look at the image comparison between the NHW
Project and x265 (HEVC) at high compression, available here:
http://nhwcodec.blogspot.com/ .
I would be very very interested in your opinion, and it would help me to
perfect the NHW Project.For me the NHW Project has more neatness, and x265
has more precision.
Else, I was a little lazy these past months, as I
2018 Jul 15
3
x265 and NHW comparison images posted to https://nhwcodec.blogspot.com/?
Hello,
Ok, I will post them in a folder on Google Drive and will give the link on
my blog page, -because among other things, on my blog page, I can not
display 2 bitmap 512x512 images side by side-... Hope it is ok!
Cheers,
Raphael
2018-07-15 1:41 GMT+02:00 J.B. Nicholson <jbn at forestfield.org>:
> Raphael Canut wrote:
>
>> I downloaded 20 images from the Internet with