Los valores numéricos que tiene un RAW en cada canal solo dependen de los fotones capturados por los filtros del sensor,
Efectivamente Gui.
Muchas gracias
Para lo que no lo conozcan y como complemento : Si se abre un RAW en RAW Therapee y visualizas el Raw ( sin ningún método ) podrás ver la imagen de un RAW.
La foto en RAW seria así;
Asi por ejemplo en un zoom a 1600 donde cada cuadro es un Pixel si pongo el cursor en un pixel verde ( X=4898 Y=1717 ) se puede ver que el nivel de este pixel es R=0, G=516, B=0 es decir lo que ha capturado el sensor.
Un RAW tan solo es un archivo con donde se ubica cada pixel por su coordenadas X e Y y su nivel de iluminación y todo esto se acompaña con los exif de la foto:
---- ExifTool ----
ExifTool Version Number : 12.50
---- File ----
File Name : _DSF5709.RAF
Directory : H:/2023 RAW y JPG/2023 02 15 La Barranca
File Size : 45 MB
File Modification Date/Time : 2023:02:15 12:38:38+01:00
File Access Date/Time : 2023:02:19 13:32:15+01:00
File Creation Date/Time : 2023:02:15 18:35:16+01:00
File Permissions : -rw-rw-rw-
File Type : RAF
File Type Extension : raf
MIME Type : image/x-fujifilm-raf
RAF Version : 0120
Exif Byte Order : Little-endian (Intel, II)
Image Width : 4416
Image Height : 2944
Encoding Process : Baseline DCT, Huffman coding
Color Components : 3
Y Cb Cr Sub Sampling : YCbCr4:2:2 (2 1)
Preview Image : (Binary data 4589455 bytes, use -b option to extract)
---- EXIF ----
Make : FUJIFILM
Camera Model Name : X-H2
Orientation : Horizontal (normal)
X Resolution : 72
Y Resolution : 72
Resolution Unit : inches
Software : Digital Camera X-H2 Ver1.20
Modify Date : 2023:02:15 12:38:37
White Point : 0.313 0.329
Primary Chromaticities : 0.64 0.33 0.21 0.71 0.15 0.06
Y Cb Cr Coefficients : 0.299 0.587 0.114
Y Cb Cr Positioning : Co-sited
Copyright :
Exposure Time : 1/120
F Number : 6.4
Exposure Program : Aperture-priority AE
ISO : 125
Sensitivity Type : Standard Output Sensitivity
Exif Version : 0232
Date/Time Original : 2023:02:15 12:38:37
Create Date : 2023:02:15 12:38:37
Offset Time : +02:00
Offset Time Original : +02:00
Offset Time Digitized : +02:00
Components Configuration : Y, Cb, Cr, -
Compressed Bits Per Pixel : 3.2
Shutter Speed Value : 1/120
Aperture Value : 6.5
Brightness Value : 6.35
Exposure Compensation : -0.33
Max Aperture Value : 2.8
Metering Mode : Multi-segment
Light Source : Unknown
Flash : No Flash
Focal Length : 16.0 mm
User Comment :
Flashpix Version : 0100
Color Space : Uncalibrated
Exif Image Width : 4416
Exif Image Height : 2944
Interoperability Index : R03 - DCF option file (Adobe RGB)
Interoperability Version : 0100
Focal Plane X Resolution : 1879
Focal Plane Y Resolution : 1879
Focal Plane Resolution Unit : cm
Sensing Method : One-chip color area
File Source : Digital Camera
Scene Type : Directly photographed
Custom Rendered : Normal
Exposure Mode : Auto
Focal Length In 35mm Format : 24 mm
Scene Capture Type : Standard
Sharpness : Normal
Subject Distance Range : Unknown
Serial Number : 2C004345
Lens Info : 16-55mm f/2.8
Lens Make : FUJIFILM
Lens Model : XF16-55mmF2.8 R LM WR
Lens Serial Number : 76B30350
Composite Image : Not a Composite Image
Gamma : 2.2
Compression : JPEG (old-style)
Artist :
Thumbnail Offset : 4240
Thumbnail Length : 9391
Thumbnail Image : (Binary data 9391 bytes, use -b option to extract)
---- MakerNotes ----
Version : 0130
Internal Serial Number : FF02B6986512 Y56701 2022:08:30 EE7310310A87
Quality : NORMAL
White Balance : Auto
Saturation : 0 (normal)
Contrast : Normal
White Balance Fine Tune : Red +0, Blue +0
Noise Reduction : 0 (normal)
Clarity : 0
Fuji Flash Mode : Not Attached
Flash Exposure Comp : 0
Focus Mode : Auto
AF Mode : Single Point
Focus Pixel : 2207 1472
AF-S Priority : Release
AF-C Priority : Release
Focus Mode 2 : AF-S
Pre AF : On
Black Level : 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020 1020
Geometric Distortion Params : 515.8888889 0.3535211268 0.5 0.6126760563 0.7070422535 0.7908450704 0.8661971831 0.9352112676 1 1.06056338 -1.172515869 -2.354660034 -3.458114624 -4.434677124 -5.274719238 -5.918792725 -6.328369141 -6.426345825 -6.426345825
WB GRB Levels Standard : 302 377 872 17 302 632 510 21
WB GRB Levels Auto : 302 562 591
WB GRB Levels : 302 562 591
Chromatic Aberration Params : 515.8888889 0.3535211268 0.5 0.6126760563 0.7070422535 0.7908450704 0.8661971831 0.9352112676 1 1.06056338 0.00048828125 0.0004272460938 0.0003662109375 0.0003356933594 0.0002746582031 0.0002136230469 0.0001220703125 -3.051757813e-005 -3.051757813e-005 0 9.155273438e-005 0.0001525878906 0.0002136230469 0.0002746582031 0.0003356933594 0.0004577636719 0.0005798339844 0.0005798339844 515.8888889
Vignetting Params : 515.8888889 0.3535211268 0.5 0.6126760563 0.7070422535 0.7908450704 0.8661971831 0.9352112676 1 1.06056338 99.22460938 98.84130859 98.46142578 98.08398438 97.29199219 95.70068359 94.1171875 92.58544922 92.58544922
---- Composite ----
Aperture : 6.4
Blue Balance : 1.956954
Image Size : 7728x5152
Megapixels : 39.8
Red Balance : 1.860927
Scale Factor To 35 mm Equivalent : 1.5
Shutter Speed : 1/120
Create Date : 2023:02:15 12:38:37+02:00
Date/Time Original : 2023:02:15 12:38:37+02:00
Modify Date : 2023:02:15 12:38:37+02:00
Circle Of Confusion : 0.020 mm
Field Of View : 73.7 deg
Focal Length : 16.0 mm (35 mm equivalent: 24.0 mm)
Hyperfocal Distance : 2.00 m
Light Value : 11.9
Lens ID : XF16-55mm F2.8 R LM WR
( He tenido que prescindir datos del EXIF ya que el post solo permite 10.000 palabras )
Con todo esto es cuando se cocina por el revelador.
Este raw lo he convertido en esta foto, con más o menos acierto.