.picasa.ini decoded

.picasa.ini

#==============================================================
#      .picasa.ini FILE STRUCTURE
# 
#   reverse-engineered by Franz Buchinger <fbuchinger@gmail.com>
#   licensed to the public domain
#
#   Picasa Version(s): 3.8.0
#
#  Changelog:
#  v0.1: initial release
# ==============================================================

#---------------------------------------------------------
# 1. Picasa Section
#
# The picasa section contains album-related metadata.
# Obviously, it is only present if the image folder was
# converted to a picasa album or if it was created during
# an import of images from a digital camera.
#---------------------------------------------------------
[Picasa]
# the name of the album
name=Foo Bar birthday
# category: "Folders on Disk" for local albums 
category=Folders on Disk
#if album was downloaded from picasa web albums, a key in this format
# is stored
P2category=Downloaded Albums~otheruserid
#if the album was uploaded, the username and album id are referenced in this format: <picasa user name>_lh=<picasa web album id>
joedoe_lh=5620038667642797505



#-------------------------------------------------------------
# 2. Contacts Section
#
# the contacts section matches the recognized faces of 
# persons to the contacts of the picasa user. 
# format <person_id>=<picasa user name>_lh,<picasa contact id>
# TODO: what about not-yet confirmed or unidentified faces
#--------------------------------------------------------------
[Contacts]
d10a8325c557b085=joedoe_lh,cb989580bc43a91
8e62398ebda8c1a5=joedoe_lh,4bd750800fb6a6b8
d736528ba71f2254=joedoe_lh,6dc6a330c4804e8


#---------------------------------------------------------------
# 3. Photo Entries
#
# each photo found in the current directory gets one ini section
# in the file, named after its filename. depending on the file 
# type (jpeg vs camera raw), different metadata is stored in the
# section.
#----------------------------------------------------------------
[P7025200.ORF]

# 3.1 BASIC METADATA

#added if image was starred in picasa
star=yes

#caption entered in picasa 
#(only added for non-jpeg photos, stored as IPTC Caption for jpeg photos)
caption=dummy

#keywords assigned in picasa 
#(only added for non-jpeg photos, stored as IPTC Keywords for jpeg photos)
keywords=beer,empanadas,keyword with spaces

#backuphash - not yet decoded
backuphash=36003

#if the pictures of the album have been uploaded
# a key/value pair in the format IIDLIST_<picasa user name>_lh=<64-bit hexadecimal photo id>
# is added to each photo entry.
IIDLIST_joedoe_lh=4dfe636c9cf4c302

# 3.2 FILTER SETTINGS

# all applied filters per photo are recorded to .picasa.ini
# to provide an editing history and/or an easier undo facility.

# Basic filter key format:
# the filters key of each photo stores a semicolon-separated list of filter entries:

filters=enhance=1;crop64=1,45930000ba03defe;

# each entry follows the format
# <filter identifier>=1,<filter value 1>,<filter value 2>,<..filter value n>;

# Here is a list of valid filter identifiers
#
#|--Identifier-|--------------Parameters-------------|----------Description-----------|---------Example---------------|
#| crop64      |  CROP_RECTANGLE*                    |   crop filter, crops the image | crop64=1,30a730d2bf1ab897     |
#|             |                                     |    according to crop rectangle |                               |
#| tilt        | !TILT_ANGLE,!SCALE                  |  tilts and scales image        | tilt=1,0.280632,0.000000      |
#| redeye      |                                     |  redeye removal                | redeye=1                      |
#| enhance     |                                     | "I'm feeling lucky" enhancement| enhance=1                     |
#| autolight   |                                     | automatic contrast correction  | autolight=1                   |
#| autocolor   |                                     | automatic color correction     | autocolor=1                   |
#| retouch     |                                     | retouch                        | retouch=1                     |
#| finetune2   | (unidentified params)               | finetuning (brightness,        | finetune2=1,0.000000,0.000000,|
#|             |                                     |highlights, shadows,color temp) | 0.000000,fff7f5f3,0.000000;   |
#| unsharp2    | !AMOUNT                             | unsharp mask filter            | unsharp2=1,0.600000;          |
#| sepia       |                                     | sepia filter (no params)       | sepia=1                       |
#| bw          |                                     | black/white filter (no params) | bw=1                          |
#| warm        |                                     | warming filter (no params)     | bw=1                          |
#| grain2      |                                     | film grain filter (no params)  | grain2=1                      |
#| tint        |!!PRESERVE_COLOR ,#TINT COLOR        | tint filter                    | tint=1,79.842102,ffff         |
#| sat         |!SATURATION                          | saturation filter              | sat=1,0.161800;               |
#| radblur     |!MOUSE_X,!MOUSE_Y,!SIZE,!AMOUNT      | radial blur                    | radblur=1,0.500000,0.500000,  |
#|             |                                     |                                | 0.239766,0.146199;            | 
#| glow2       |!INTENSITY,!!RADIUS                  | glow effect                    | glow2=1,0.650000,3.000000;    |
#| ansel       |#COLOR                               | filtered black/white           | ansel=1,ffffffff;             |
#| radsat      |!MOUSE_X,!MOUSE_Y,!RADIUS,!SHARPNESS | radial saturation              | radsat=1,0.421652,0.594697,   |
#|             |                                     |                                | 0.333333,0.309942;            | 
#| dir_tint    |!MOUSE_X,!MOUSE_Y,!GRADIENT,!SHADOW  | directed gradient              | dir_tint=1,0.306743,0.401515, |
#|             |                                     |                                | 0.250000,0.250000,ff5bfff3;   |
# 
# LEGEND: 
# ! = float between 0 and 1, precision:6
# !! = float with arbitrary range, precision:6
# # = 32-bit color in hex notation, e.g.: fff7f5f3
# [] = crop rectangle



# 3.3 TEXT EDITS

text=1;136;11;sample text;Aharoni;0.279301,0.503929,0.033333,0.000000;v1,4294967295,4278190080,128.000000,1.000000,0.364486,0.878906,700,258,49152;;
textactive=1

# 3.4. RECOGNIZED FACES

# all recognized faces are stored as bigint crop rectangles in the faces key
# format faces=rect64(CROP_RECTANGLE*), contact_id;
faces=rect64(3f845bcb59418507),8e62398ebda8c1a5;rect64(9eb15e89b6b584c1),d10a8325c557b085


#
# APPENDIX
#

# A.1 DATA TYPES 

# A.1.1 CROP BOX RECTANGLES (*)

# Picasa uses a special string format to store crop boxes of
# detected faces and from an applied crop filters. The number encased 
# in the rect64() statement is a 64 bit hexadecimal number:

#     rect64(3f845bcb59418507)

# break this number into 4 16-bit numbers by using substrings:

# '3f845bcb59418507'.substring(0,4) //"3f84"
# '3f845bcb59418507'.substring(4,8) //"5bcb"
# '3f845bcb59418507'.substring(8,12) // "5941"
# '3f845bcb59418507'.substring(12,16) // "8507"  

# convert each obtained substring to an integer and divide it
# by the highest 16-bit number (2^16 = 65536), which should give 0 < results < 1.
# these are the relative coordinates of the crop rectangle (left,top,right,bottom):

# parseInt("3f84",16)/65536 //0.24810791015625  - left
# parseInt("5bcb",16)/65536 //0.3585662841796875 - top
# parseInt("5941",16)/65536 //0.3486480712890625 - right
# parseInt("8507",16)/65536 //0.5196380615234375 - bottom

# for absolute coordinates, multiply the left/right coordinates with  
# the image width and the top/bottom coordinates with the image height

# A.1.2 FRACTIONAL FLOATS (!)

# floats between 0 and 1 with a precision of 6 digits, e.g. 0.306743.
# Often used to encode relative settings or mouse positions.

# A.1.3 FLOATS (!!)

# arbitrary floats with a precision of 6 digits

# A.1.4. COLORS (#)

# colors are stored as 32-bit hex string, e.g. ff5bfff3

I'm wondering about the encoding of these files. Is it UTF-8?

@Philipp91 In English language Windows, .picasa.ini files are encoded in UTF-8

Other languages will probably need a different encoding to support the character set for the file names.