Displaying 20 results from an estimated 3000 matches similar to: "NHW Project - very high compression"
2018 May 30
0
NHW Project - improvement of -l7 quality setting - more neatness
Hello,
Just a word to let you know that I have improved -l7 high compression
quality setting, thanks to a new processing and I have also corrected an
error in the residual coding.Now it has more neatness/definition.Files size
is also a little smaller (and please keep in mind that the entropy coding
schemes are not optimal for now, so we can save 1.5Ko-2Ko per .nhw file).
Actually I find -l7
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 May 23
0
NHW Project - more test with x265 (HEVC) codec
Hello,
I don't have worked on the NHW Project this past week (I also have to work
on an other project) but I found time today to make an "extensive" testing
of x265 (HEVC) and the NHW codec at high compression (-l7 setting).
That's right that x265 is a very good codec! Really impressive.The NHW
Project is not as good, it can only compete with x265 (HEVC) on quite high
quality
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 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 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 May 28
0
NHW Project - high compression & community
Hello,
I've found some time to get back to the NHW Project.In fact a Xiph forum
member told me that even if I will start a new job, he hopes that I will
still continue to develop a little the NHW Project, on my spare time.I told
him that I would furthermore spend my spare time on the NHW Project if a
community around the project could emerge... and he told me that certainly
the best way for
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 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
2019 Jan 03
0
NHW Project - good quality improvement & encoding speed improvement
Hello,
Just a quick message to let you know that I have made good quality
improvements for very high and extreme compression of the NHW Project (-l8
to -l15 quality settings).The NHW Project starts to be really competitive
with x265 (HEVC) at these very high compression ratios.I even find the NHW
Project visually better than x265 (HEVC) for mid and high compression!
I have also improved encoding
2018 May 02
0
NHW Project - new -l7 quality setting
Hello all,
Just a quick message to let you know that I have added to the NHW Project a
-l7 high compression quality setting.
This setting is still experimental and can be improved, but actually (I am
certainly not objective) I find it competitive with x265 (HEVC), mainly
because it has a good neatness.
Update at: http://nhwcodec.blogspot.com/
You can also find sample 512x512 test bitmap images
2019 Feb 10
0
NHW Project - new -l18 "extreme" compression quality setting
Hello,
I have just added a new -l18 "extreme" compression quality setting to the
NHW Project.I find this quality setting very good and actually better than
x265 (HEVC).
First, I wanted to let you know that compression of the wavelet DC image is
really not efficient at extreme compression, I have the fast ideas to
improve it, and so we can really save 2.5KB per .nhw compressed files in
2018 Aug 29
0
NHW Project - some update
Hello,
Just a quick update to let you know that I have corrected many bugs in the
NHW Project, and notably one bug, spotted by skal (Google WebP), which
caused compilation errors or warnings.I have also corrected a bug in the
-l8 quality setting and so now compression is better.The -l8 quality
setting is now very competitive with x265 (HEVC)!
Update at: http://nhwcodec.blogspot.com/
As always,
2018 Dec 11
0
NHW Project - speed measurement 2 - very high compression
Hello,
If it could be of interest, here are new speed measurement for -l13 very
high compression setting.
For x265 (HEVC), I use BPG codec, and this time I use -m 0 setting which
uses the fastest encoding setting of x265.I run the .exe 10x times and I
pick the best scores.
So here are the timings at -l13 very high compression:
Encode time: x265 (BPG -m 0): 80ms NHW: 20ms
Decode time: x265
2018 May 15
0
NHW Project - quality improvement for -l6, -l7 quality settings
Hello all,
Just a quick message to let you know that I have improved -l6 and -l7 high
compression settings.
These settings are notably better now, with more neatness and more
precision.I find them competitive with x265 (HEVC) now!!!
Update at: http://nhwcodec.blogspot.com/
Else I realize that the strength of the NHW Project is that it is
royalty-free, and competitive with the great x265 codec
2018 Mar 28
0
NHW Project - high compression (-l6 setting and below)
Hello Ken,
Many thanks for your reply!
Yes, I very need to adapt the NHW codec to any image size.But actually it
is the least interesting part, I don't think that it is that difficult
(compared to creating high compression settings) but it is very boring,
annoying... Really not the part that I prefer... For now, as I am jobless,
my aim is to have "pleasure" with the NHW Project and
2019 Feb 03
0
NHW Project - new -l17 "extreme" compression quality setting
Hello,
For those interested, I have added a new -l17 "extreme" compression quality
setting to the NHW Project.I find this setting competitive with x265
(HEVC).Actually I have tested -l17 on 15 rather good quality images, and on
these images I prefer the results of the NHW Project.
We can still save 2.5KB per .nhw compressed files.
More at: http://nhwcodec.blogspot.com/ .
I start
2019 Feb 17
0
NHW Project - new -l19 "extreme" compression quality setting
Hello,
For those interested, I have added a new -l19 "extreme" compression quality
setting to the NHW Project.This -l19 quality setting is really competitive
with x265 (HEVC) on rather good quality images.
An important remark: we can really save 2.5KB in average per .nhw
compressed file as the entropy coding schemes are not optimal, especially
at extreme compression.I have the fast
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
2018 Mar 30
0
NHW Project - high compression (-l6 setting and below)
Hello Spork,
> If you want though, when I find some time, I can work on supporting a
better command line parsing.
Yes that would be great as my command line parsing is not good at all.
> Does your codec compile under Linux? If not, that's something I can try
to work on as well.
I never tested my codec under Linux )-:, and so it would be also great to
compile it under Linux.I think