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Old 12th July 2004, 18:27   #18  |  Link
Fizick
AviSynth plugger
 
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Join Date: Nov 2003
Location: Russia
Posts: 2,183
Sorry my English.
Yes,
Quote:
de-spot has other uses too besides desratching
In the introduction we may read about
Quote:
clicks (different words for this effect are sparklies, spots) on our screens
.
I think it is not very frequent, however quite
Quote:
common filtering tasks associated with analogue sources
.

I can post my more detail article analisys here.

1. There are no one picture which shows as filter works O.K.:
Pic.1 shows first source frame (vhs-source1line.jpg) with long horizontal drop-out,
Pic.2 shows second source frame with more short long horizontal drop-out,
Pic.3 shows as DeSpot successfully detect (mark) drop-line of first frame.
Pic.4 shows as DeSpot successfully detect (mark) drop-line of second frame.
Before Pic.5 there are text:
Quote:
We tried to do vhs drop-out fixing with this filter, but we had less luck with it. It seems that vhs drop-outs are too gentle for despot to find. The examples in
And Pic.5 again shows SOURCE frame 1. (The SAME vhs-source1line.jpg). Why you do not show CLEANED frame? I am sure, that if DeSpot detect and mark a spot, it MUST clean it (may be partially or with artefactes.)
Pic.6 show man without buttons (false cleaning).
Pic.7 show man with buttons (source).
It is of cource main faults of Despot.
But there are many parameters in the filter, for example we may control spot size, and spot brightness (only black for example).

2. I have some e-mail conversation with I4004 today. As he say, he use old version 1.0 of Despot (now lastest is v. 3.1 with many improvements).

3. I also ask I4004, why he does not try more appropriate filter for VHS line drop-out and descratch. I have such filter, may be you know. It has a name (surprise...) DeSñratch . It can originally to detect and clean only vertical scratch. But image may be rotated before and de-rotated after. I am not sure, that it will work, but why not try ?

4. I4004 probably will try Descratch and new vesion of Despot.

5. May be some article update must be done (later).

6. I am not "fizick", but "Fizick" !

Last edited by Fizick; 4th June 2005 at 00:00.
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