Displaying 5 results from an estimated 5 matches for "yiq".
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2008 May 19
0
Updated package adimpro
...be changed to using rpm-profiles.
- - new function write.raw provides a possibility to store
~ RAW sensor data as a greyscale png-image
~ these images are recognized by read.raw, see demo(raw).
- - write.image now keeps color space by default
- - read.image/write.image now also handles xyz, yuv, yiq and
~ hsi color spaces correctly
- - the location of ImageMagick is now automatically determined
~ using function Sys.which and set as an environment variable
~ ImageMagick when the package is loaded (This requires R >=2.6.0).
~ The argument convert.path in read.image and write.image is no
~...
2008 May 19
0
Updated package adimpro
...be changed to using rpm-profiles.
- - new function write.raw provides a possibility to store
~ RAW sensor data as a greyscale png-image
~ these images are recognized by read.raw, see demo(raw).
- - write.image now keeps color space by default
- - read.image/write.image now also handles xyz, yuv, yiq and
~ hsi color spaces correctly
- - the location of ImageMagick is now automatically determined
~ using function Sys.which and set as an environment variable
~ ImageMagick when the package is loaded (This requires R >=2.6.0).
~ The argument convert.path in read.image and write.image is no
~...
2016 Aug 17
2
enabling interleaved access loop vectorization
...4 PM, Zaks, Ayal <ayal.zaks at intel.com> wrote:
> Hi Michael,
>
>
>
> Don’t quite have a full reproducer for you yet. You’re welcome to try and
> see what’s happening in 32 bit mode when enabling interleaving for the
> following, based on “https://en.wikipedia.org/wiki/YIQ#From_RGB_to_YIQ”:
>
>
>
> void rgb2yik (char * in, char * out, int N)
>
> {
>
> int j;
>
> for (j = 0; j < N; ++j) {
>
> unsigned char r = *in++;
>
> unsigned char g = *in++;
>
> unsigned char b = *in++;
>
> unsigned char...
2016 Aug 16
2
enabling interleaved access loop vectorization
Hi Ayal, Elena,
I'd really like to enable this by default.
As I wrote above, I didn't see any regressions in internal benchmarks, and
there doesn't seem to be anything in SPEC2006 either. I do see a
performance improvement in an internal benchmark (that is, a real
workload).
Would you be able to provide an example that gets pessimized? I have no
doubt you've seen regressions
2016 Sep 01
2
enabling interleaved access loop vectorization
...PM, Zaks, Ayal <ayal.zaks at intel.com<mailto:ayal.zaks at intel.com>> wrote:
Hi Michael,
Don’t quite have a full reproducer for you yet. You’re welcome to try and see what’s happening in 32 bit mode when enabling interleaving for the following, based on “https://en.wikipedia.org/wiki/YIQ#From_RGB_to_YIQ”:
void rgb2yik (char * in, char * out, int N)
{
int j;
for (j = 0; j < N; ++j) {
unsigned char r = *in++;
unsigned char g = *in++;
unsigned char b = *in++;
unsigned char y = 0.299*r + 0.587*g + 0.114*b;
signed char i = 0.596*r + -0.274*g + -0.321*b;
s...