Getting closer to in camera conversion (Sony)
My Sony is set to store both ARW and JPG. I'd like to be able to read the ARW into a program's memory and get closer to matching the JPG but with more bits per value. Currently, the best I've managed is slightly washed out and very slightly grainy compared to the JPG. There are also apparent differences in interpolation (such as thin dark lines wider in what I read from ARW vs. JPG).
I'm trying to write fairly general code for a stitching program, rather than fix an individual photo (so the exif dump below is given as an example of what kind of data is there, not for specific values).
My current code is:
auto& p = libRaw->imgdata.params; p.output_bps = 16; p.user_flip = 0; p.output_color = 1; p.no_auto_bright = 1; p.use_camera_wb = 1; p.use_camera_matrix = 3; libRaw->unpack(); libRaw->dcraw_process(); auto* im = libRaw->dcraw_make_mem_image(&status);
Does any of the Exif data guide me in setting parameters to match what the camera did?
ExifTool Version Number : 12.42 File Name : DSC00215.ARW Directory : D:/Share/FTP/12120214 File Size : 25 MB File Modification Date/Time : 2022:02:14 09:35:10-05:00 File Access Date/Time : 2022:06:27 00:04:18-04:00 File Creation Date/Time : 2022:04:24 09:55:57-04:00 File Permissions : -rw-rw-rw- File Type : ARW File Type Extension : arw MIME Type : image/x-sony-arw Exif Byte Order : Little-endian (Intel, II) Image Description : Orientation : Rotate 90 CW Image Width : 6048 Image Height : 4024 Bits Per Sample : 14 Compression : Sony ARW Compressed Photometric Interpretation : Color Filter Array Samples Per Pixel : 1 Planar Configuration : Chunky X Resolution : 350 Y Resolution : 350 Resolution Unit : inches CFA Repeat Pattern Dim : 2 2 CFA Pattern 2 : 0 1 1 2 Sony Raw File Type : Sony Compressed RAW Sony Tone Curve : 8000 10400 12900 14100 Strip Offsets : 974848 Rows Per Strip : 4024 Strip Byte Counts : 24337152 Chromatic Aberration Correction : Auto Distortion Correction : Off Default Crop Origin : 12 12 Default Crop Size : 6000 4000 Sony Crop Top Left : 12 12 Sony Crop Size : 6000 4000 Preview Image Start : 139426 Preview Image Length : 832178 Y Cb Cr Positioning : Co-sited Exposure Time : 1/160 F Number : 2.8 ISO : 160 Sensitivity Type : Recommended Exposure Index Recommended Exposure Index : 160 Exif Version : 0231 Date/Time Original : 2022:02:14 14:35:10 Create Date : 2022:02:14 14:35:10 Offset Time : -05:00 Offset Time Original : -05:00 Offset Time Digitized : -05:00 Components Configuration : Y, Cb, Cr, - Compressed Bits Per Pixel : 8 Brightness Value : 6.23203125 Exposure Compensation : +0.7 Max Aperture Value : 2.8 Metering Mode : Spot Light Source : Unknown Flash : Off, Did not fire Focal Length : 105.0 mm Rating : 0 Brightness : 0 Long Exposure Noise Reduction : On (unused) High ISO Noise Reduction : Off HDR : Off; Uncorrected image WB Shift AB GM : 0 0 WB Shift AB GM Precise : 0.00 0.00 Face Info Offset : 94 Sony Date Time : 2022:02:14 14:35:10 Sony Image Width : 6000 Faces Detected : 1 Face Info Length : 37 Meta Version : DC7303320222000 Face 1 Position : 319 2044 225 225 Creative Style : Standard Color Temperature : Auto Color Compensation Filter : 0 Scene Mode : Standard Zone Matching : ISO Setting Used Dynamic Range Optimizer : Off Image Stabilization : On Color Mode : Standard Full Image Size : 6000x4000 Preview Image Size : 1616x1080 File Format : ARW 2.3.5 Flash Exposure Compensation : 0 White Balance Fine Tune : 0 White Balance : Auto Sony Model ID : ILCE-7M3 Multi Frame Noise Reduction : Off Picture Effect : Off Soft Skin Effect : Off Vignetting Correction : Auto Lateral Chromatic Aberration : Auto Distortion Correction Setting : Off Lens Type : E-Mount, T-Mount, Other Lens or no lens Lens Spec : E 105mm F2.8 Auto Portrait Framed : No Flash Action : Did not fire Electronic Front Curtain Shutter: On Focus Mode : Manual AF Area Mode Setting : Flexible Spot Flexible Spot Position : 320 240 AF Point Selected : n/a AF Points Used : (none) AF Tracking : Off Focal Plane AF Points Used : 0 Multi Frame NR Effect : Normal Focus Location : 6000 4000 3000 2000 Variable Low Pass Filter : n/a Priority Set In AWB : Standard Metering Mode 2 : Spot (Standard) Exposure Standard Adjustment : 0 RAW File Type : Compressed RAW Quality : RAW + Extra Fine Pixel Shift Info : n/a Flash Level : Normal Release Mode : Normal Sequence Number : Single Anti-Blur : On (Shooting) Sequence Image Number : 1 Sequence File Number : 1 Sequence Length : 1 file Camera Orientation : Rotate 90 CW Quality 2 : RAW + JPEG Sony Image Height : 4000 Model Release Year : 2017 ISO Setting : Auto ISO Auto Min : 100 ISO Auto Max : 12800 Ambient Temperature : 15 C AF Area Mode : Flexible Spot Focus Position 2 : 196 Camera Temperature : 17 C Exposure Program : Manual Intelligent Auto : Off Sony ISO : 176 Base ISO : 100 Stops Above Base ISO : 0.8 Sony Exposure Time 2 : 1/161 Sony Max Aperture Value : 2.9 Sony Image Width Max : 6024 Sony Image Height Max : 4024 Picture Effect 2 : Off Lens Zoom Position : 0% Battery Temperature : 36.1 C Battery Level : 73% Lens Mount 2 : E-mount Lens Type 3 : Sigma 105mm F2.8 DG DN MACRO | A Camera E-mount Version : 1.70 Lens E-mount Version : 1.60 Lens Firmware Version : Ver.01.001 Tiff Metering Image Width : 44 Tiff Metering Image Height : 30 Tiff Metering Image : (Binary data 2640 bytes, use -b option to extract) Release Mode 3 : Normal Self Timer : Off Flash Mode : Rear Sync HDR Setting : Off Picture Profile : Gamma Still - Standard/Neutral (PP2) WB RGB Levels : 652 256 376 Min Focal Length : 105.0 mm Distortion Corr Params Number : 16 (Full-frame) Shutter : Mechanical (2685 5194 6519) Flash Status : No Flash present Shutter Count : 224 Sony Exposure Time : 1/161 Sony F Number : 2.9 Shutter Count 2 : 224 Release Mode 2 : Normal Internal Serial Number : 7aff00004509 Lens Mount : E-mount Lens Format : Full-frame Lens Type 2 : Sigma 105mm F2.8 DG DN MACRO | A Distortion Corr Params Present : Yes Lens Spec Features : E Shutter Count 3 : 224 APS-C Size Capture : Off User Comment : Flashpix Version : 0100 Color Space : sRGB Exif Image Width : 6000 Exif Image Height : 4000 Interoperability Index : R98 - DCF basic file (sRGB) Interoperability Version : 0100 File Source : Digital Camera Scene Type : Directly photographed Custom Rendered : Normal Exposure Mode : Manual Digital Zoom Ratio : 1 Focal Length In 35mm Format : 105 mm Scene Capture Type : Standard Contrast : Normal Saturation : Normal Sharpness : Normal Lens Info : 105mm f/2.8 Lens Model : 105mm F2.8 DG DN MACRO | Art 020 GPS Version ID : 2.3.0.0 GPS Status : Measurement Void GPS Map Datum : WGS-84 GPS Differential : No Correction PrintIM Version : 0300 SR2 Sub IFD Offset : 55592 SR2 Sub IFD Length : 42826 SR2 Sub IFD Key : 0x44332211 Black Level : 512 512 512 512 WB RGGB Levels Auto : 2604 1024 1024 1512 WB RGGB Levels : 2604 1024 1024 1512 Color Matrix : 1177 -211 91 -54 1267 -159 72 -232 1216 WB RGB Levels Daylight : 2468 1024 1604 WB RGB Levels Cloudy : 2668 1024 1472 WB RGB Levels Tungsten : 1520 1024 2824 WB RGB Levels Flash : 2712 1024 1424 WB RGB Levels 4500K : 2228 1024 1800 WB RGB Levels Shade : 2944 1024 1328 WB RGB Levels Fluorescent : 2284 1024 2344 WB RGB Levels Fluorescent P1 : 2368 1024 1716 WB RGB Levels Fluorescent P2 : 2628 1024 1580 WB RGB Levels Fluorescent M1 : 1772 1024 2808 WB RGB Levels 8500K : 3096 1024 1260 WB RGB Levels 6000K : 2644 1024 1488 WB RGB Levels 3200K : 1700 1024 2464 WB RGB Levels 2500K : 1320 1024 3372 White Level : 15360 15360 15360 Vignetting Corr Params : 16 0 448 912 1408 1936 2496 3088 3696 4304 4912 5520 6096 6720 7408 8208 8976 Chromatic Aberration Corr Params: 32 -256 -256 -256 -256 -256 -256 -256 -256 -256 -256 -256 -256 -256 -128 -128 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -128 -256 Distortion Corr Params : 16 2 3 6 13 23 37 53 71 90 111 131 153 173 190 204 211 Subfile Type : Reduced-resolution image Make : SONY Camera Model Name : ILCE-7M3 Software : ILCE-7M3 v4.01 Modify Date : 2022:02:14 14:35:10 Thumbnail Offset : 43338 Thumbnail Length : 10718 Aperture : 2.8 Blue Balance : 1.476563 CFA Pattern : [Red,Green][Green,Blue] Image Size : 6048x4024 Lens ID : Sigma 105mm F2.8 DG DN MACRO | A Megapixels : 24.3 Preview Image : (Binary data 832178 bytes, use -b option to extract) Red Balance : 2.542969 Scale Factor To 35 mm Equivalent: 1.0 Shutter Speed : 1/160 Create Date : 2022:02:14 14:35:10-05:00 Date/Time Original : 2022:02:14 14:35:10-05:00 Modify Date : 2022:02:14 14:35:10-05:00 Thumbnail Image : (Binary data 10718 bytes, use -b option to extract) Focus Distance 2 : 16.09 m Circle Of Confusion : 0.030 mm Field Of View : 19.5 deg Focal Length : 105.0 mm (35 mm equivalent: 105.0 mm) Hyperfocal Distance : 131.05 m Light Value : 9.6
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