1. When i create badpixel.bin i do it inside the camera with the script. I understand there is no need to cover the lens since the picture being taked as a dark frame ?
2. I did it twice - one with my lens cap open (20,000 bad) and one with it closed (11,000 bad). Is it something i have to do every couple of days since the sensor is subject to aging/temp change/etc, because i see that those numbers are changing...so just doing it once is not enough, i think.
3. Why DNG format requires badpixel table and RAW doesn't? It's just a RAW from the camera converted to more readable format. And if it do requires it, why i have option to select bad-pixel removal or not?
4. I saw that the RAW size is 15MB, and by calcs it means i have 12bit A/D sensor. Does this means that now the RAWS will be with four times dynamic range compared to my previous S5 with 10bit sensor ?
I repeated the test and again got exacly two different bad pixel numbers: 22,391 and 11,408.I understand both are saved in the firmware of the camera and each is used depending on the shooting conditions.
My questions are:1. Are the badpixel tables are factory settings written specially for each camera ?
2. If each badpixel table is used for different shooting conditions, by using just one table (for example the smaller number) could result in black dots in the DNG picture or any other artefacts ?
Why not store both tables (or at least the biggest one you get)
3. And question about the 12bit RAW:I was reading the post about it as you linked me to. It clearly shows that only once in 4 value levels is used - showing it's 10bit A/D, so why the sensor delivers 12bit data? To waste memory and CPU time?
or do you mean the badpixel.lua that gets the canon's table of bad-pixels?
And i didn't understand your signature
I've got my SX40 with badpixel.bin file created successfully (despite 0 count of bad pixels..) anyways.
My question is can anyone modify script of creating this file? Because it makes OVERBRIGHT shots looking for BLACK pixels. But i have RED "hot" pixels with long exposure shots i'd like to get rid of.
Or at least is there any way of manually creation badpixel.bin ?
Quote from: _AVP_ on 21 / July / 2013, 08:19:45I've got my SX40 with badpixel.bin file created successfully (despite 0 count of bad pixels..) anyways.If it found 0 bad pixels, then it wasn't successful. In all recent versions of CHDK (including 1.1), badpixel.bin must be created with the in-camera menu item, not the badpixel script.
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