Frage von deti:
As previously announced, I wanted to question Black Dots on the Panasonic AG-HPX301E synonymous (contribute something, to recap: http://forum.slashcam.de/pansonics-neue-hpx301e-macht-starke-black-dots-vt75673.html). Unfortunately, I just had no such camera at hand, which naturally led to a direct appointment of the same. Now, the UPS Christmas Male but in fact still a vorbeigebracht yesterday and I have taken with them like home.
The camera was manufactured in September 2009 and shipped with firmware 9:30 (and after update is now 9.33). For the tests, I use the Lens KIT XT17x4.5BRM-K14, and two 32GB P2 cards of the E series.
The recordings I made in 1080pn25 mode in AVC-Intra 100 and the default settings of the camera. I enclose an original frame (; 1920x1080), the f-field in an RGB-3dB, ND Clear, f / 4 and another at +6 dB, ND4, / 4 shows. As expected, the noise at-3dB to +6 dB, and no significant exercise. Black dots, especially in the blue, I could not understand. Rather, black and white seem to be outliers in all the colors balanced.
Comparison to the same shots with a SonyPMW-EX3. Have you any suggestions what to test or shoot?
Deti
PS: The red dot in the RGB field is the tally light on the camcorder.
Antwort von domain:
The EX3 pictures can not quite compare with those of the Pana 301, because it obviously with a much softer gamma were included, but interesting is the memory overhead of the compressed images shown here in Comparison.
The more information that is a Picture shows (and this of course is one synonymous Grain) more so KB needs the Jpeg compression. Accordingly, the Pana with 265 rushing or 305 KB less than the EX3 with 316 and 390 KB for each-3DB and +6 dB gain.
A great result for Pana, do not see any unusual errors.
Antwort von deti:
@ Domain: The gamma curve at the different EX3 have known you well - the camera has been with us already in use - have therefore repeated the test with the default settings. Yet I have synonymous set the JPEG export higher quality, making the resulting files now the EX3 have again become larger (not so) surprised. Interestingly, in any case, the difference at +6 dB - the noise of the Panasonic is pretty tough - there is probably the single frame compression synonymous 100Mbit / s at creation. In the EX3 is so fine noise, that's completely different in each frame, having presumably by the quantization of the MPEG-2 compression.
Deti
Antwort von WoWu:
Accordingly, the Pana with 265 rushing or 305 KB less than the EX3 with 316 and 390 KB for each-3DB and +6 dB gain. Thus, a "windy" bill I've ever seen .... Motte Cabinet.
Where is the derivation?? Or is this another of those "Grazer-know"?
Deti @
In the EX3 is so fine noise, that's completely different in each frame, having presumably by the quantization of the MPEG-2 compression. Probably going to have the A / D conversion, not only in coding, lost ... And with her, of course, all image details that frequency.
One must not forget synonymous,) the different Quantisierungsverfahren (tables of DCT and IDCT, which is very strongly differing codecs, because there are as synonymous 1/4Pix Resolutionin MPEG2 not.
But I admit that such a test can not be done on the fly to.
For me there were two differences to "light up" once the benefits of 10-bit, which of course can not reflect demarcated into three RGB panels that synonymous take a camera with 4 bits deep, more or less correct on the others and, of course, are the differences in the codec, which is reflected in the majority in the Bewegungsprädiktion, so synonymous nix static for a color chart.
Because the Bildprozessing but is dynamic, appear synonymous only in the limits of motion.
This noise is changing with the Bildprozessing namely, that a noise analysis, as is done here is synonymous only valid for this single, static image. Admittedly, nothing that the videographers now receives daily as Cotent :-))
Antwort von domain:
Thus, a "windy" bill I've ever seen .... Motte Cabinet.
Where is the derivation?? Or is this another of those "Grazer-idea" :-)) The derivation is quite simple, but perhaps not right. Inlay a 1920 * 1080-it Picture in Photoshop with a single color, eg blue. Then save the picture in jpeg and you will get eg 150
KB. Then alter the picture by inserting a Rauschstörfilters. Then looks like the Pana, wonderful Grain and save it again from under the same conditions in Jpeg. After your picture has suddenly almost 4
MB. Tested this morning ;-))
Can you now understand themselves. How do you explain that?
Antwort von WoWu:
So you make VIDEO-analysis?
Sorry, but unfortunately I balk because their hair.
Since the images so you can print it and put on a schaun Briefwage And what is more difficult .... which has more then absorbed Color and therefore more noise in the picture.
Turning times a Picture in Photoshop by 1 ° and then back again (without UNDO) and then look, what did Photoshop it.
Antwort von deti:
@ WoWu: The black dots you get with the HPX301E out already, but actually not on solid colors. The effect has apparently to do with the image content - at least I can make it visible s.realen scenes. When one remembers the place of dots, then one sees there always reappear Dots - which remain tend to be longer than just one frame (about 5-10 frames). At the same time, there are areas that occur where no dots. Enclosed a picture, where one sees many scattered dots - a particular favorite is the bottom left in the blue part of the flame of the second candle.
Somehow it seems very difficult "ever if ... then make ..."- relationship, because at least in my copy of this camera you have to experiment until you rather they Dots riff.
After the holidays, I try the whole time via HD-SDI to rule out that the codec provoke this effect.
... and fairness' sake, I must say that I rarely so knackscharfe balanced and still images from a video I captured. Since each frame looks like a picture of a pretty good camera.
Deti
Antwort von WoWu:
Thanks, Deti.
You seem to be one of the "Good to have" .. or vice versa, the Of Sandor was probably pretty verkurbelt.
Perhaps she has already had time to test someone who had lost his way in and Maintenace menu has bolted awake.
As for picture quality, you should be a decent draufschrauben Lens .. when you fall from the faith, because the recordings are synonymous in the video field super sharp.
We are now only waiting for the 2 / 3 "... that's it all for a while.
Incidentally, if you can create dots, sometimes dressed only the sharpness, so that you are modifying them synonymous.
That was the series that I had recently done for Sandor yet.
As allowed themselves to the points with sharpness are pleased to once again and hide.
Tell me know when you have new information regarding the OS, because, since it is ran ninth.
Antwort von domain:
Turning times a Picture in Photoshop by 1 ° and then back again (without UNDO) and then look, what did Photoshop it. I'm sorry WoWu you're lying next to it. Have just the original undisturbed blaugefüllte Picture by 5 degrees to the right and then not again undo rotated to the left.
In fact, the picture now has a footprint of 208 KB instead of 144 KB as before.
But it is now 2108 * 1415 pixels, probably a peculiarity of Photoshop for the rotation and Retourdrehung, ie it is widened by 43.8% and this corresponds exactly to the increase of 144 to 208 KB.
Antwort von WoWu:
I wanted so synonymous only say that Photoshop is the video analysis as a handle in the piñata.
All times of the crossbar s.Fehlerquellen apart in the codec change.
So with such methods is to come here the issue with the best will not do justice.
And I would want to do it now synonymous and Photoshop does not like to leave next to the object of discussion.
Antwort von domain:
Clear-cut case: you can not explain everything that belongs to the realm of miracles bags :-))
