Messages

Hi,

I have now published a python tool to parse the CR3 structure and extract jpeg, crx pictures...

Help is welcome to understand crx compression.

kind regard,

Laurent

Hi,

Please find a tentative to document the new CR3 format here:
https://github.com/lclevy/canon_cr3

Contributions are welcome to open this format with me, as DCraw from Dave Coffin seems frozen...

Laurent
(from http://lclevy.free.fr/cr2/)

thanks Greg,

I added a section in  my doc:
http://lclevy.free.fr/cr2/index.html#ml
to highlight Magic Lantern work and links with Canon Raw v2 format interpretation.

please let me know if you know other useful information to open this proprietary format...

Laurent

[https://www.diffnow.com/?report=92yqa]

Hi Greg,

how do you find slice1, slice3, height and width values, compared to this table (extracted from CR2 files)
http://lclevy.free.fr/cr2/#app, Sensor information ?
https://github.com/lclevy/libcraw2/blob/master/docs/cr2_database.txt
and this poster:
https://github.com/lclevy/libcraw2/blob/master/docs/cr2_lossless.pdf

Kind regards,

Laurent

It works with FRSP but the image is not decoded.

500D edmac RD1 default configuration :

Code Select Expand

struct edmac_info RD1_info = {
    .xa     = 1648 * 14/8,
    .xb     = 1616 * 14/8,
    .yb     = 3208 - 1,
    .xn     = 2,
    .off1a  = 4832 * 14/8 - 1648 * 14/8,
    .off1b  = 4832 * 14/8 - 1616 * 14/8,
    .off2b  = 0xe623490,
};

struct edmac_info RD1_info = {
    .xa     = slice1 * 14/8,
    .xb     = slice3 * 14/8,
    .yb     = height + 4 - 1,
    .xn     = 2,
    .off1a  = width * 14/8 - slice1 * 14/8,
    .off1b  = width * 14/8 - slice3 * 14/8,
    .off2b  = (((width * 14/8) * (height + 4 - 1) + 56) * -1 & 0xFFFFFFE),  //digic 3/4
};


7D edmac RD1 default configuration :

Code Select Expand

struct edmac_info RD1_info = {
    .xa     = 1760 * 14/8,
    .xb     = 1920 * 14/8,
    .yb     = 3520 - 1,
    .xn     = 2,
    .off1a  = 5360 * 14/8 - 1760 * 14/8,
    .off1b  = 5360 * 14/8 - 1920 * 14/8,
    .off2b  = 0xe08556c,
};

Comparison of configuration 500D vs 7D - https://www.diffnow.com/?report=92yqa

Current interpretation - http://s24.postimg.org/uu3knpc0z/ttj-config3.png/

Hi,

You've got information here too:
http://lclevy.free.fr/cr2/
https://github.com/lclevy/libcraw2/blob/master/docs/cr2_lossless.pdf?raw=true
https://github.com/lclevy/libcraw2

Laurent

Hi,

If you liked this presentation:
http://www.elcomsoft.com/presentations/Forging_Canon_Original_Decision_Data.pdf
maybe you'll be interested by this code:
https://github.com/lclevy/odd_verify

Thanks to Magic Lantern project to let me extract keys from memory!

Laurent
http://lclevy.free.fr/cr2/