DoctorBe Posted September 30, 2023 Share Posted September 30, 2023 In the Affinity Photo Export routine I set the jpeg quality to 100%. However, when I read the EXIF of the exported file it says jpeg quality 80%. Can someone please explain this to me and suggest how I can truly export at 100%? Quote Link to comment Share on other sites More sharing options...
walt.farrell Posted September 30, 2023 Share Posted September 30, 2023 Welcome to the Serif Affinity forums. What kind of file did you start with? As far as I know, there is no standard way to determine the quality setting that was used for JPG creation, so if you started with a file from some other application perhaps you're just seeing some residual EXIF info that application provided? Quote -- Walt Designer, Photo, and Publisher V1 and V2 at latest retail and beta releases PC: Desktop: Windows 11 Pro, version 23H2, 64GB memory, AMD Ryzen 9 5900 12-Core @ 3.00 GHz, NVIDIA GeForce RTX 3090 Laptop: Windows 11 Pro, version 23H2, 32GB memory, Intel Core i7-10750H @ 2.60GHz, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU. iPad: iPad Pro M1, 12.9": iPadOS 17.4.1, Apple Pencil 2, Magic Keyboard Mac: 2023 M2 MacBook Air 15", 16GB memory, macOS Sonoma 14.4.1 Link to comment Share on other sites More sharing options...
DoctorBe Posted October 1, 2023 Author Share Posted October 1, 2023 47 minutes ago, walt.farrell said: Welcome to the Serif Affinity forums. What kind of file did you start with? As far as I know, there is no standard way to determine the quality setting that was used for JPG creation, so if you started with a file from some other application perhaps you're just seeing some residual EXIF info that application provided? My starting file was directly from Nikon D500 camera with jpeg quality set to the highest level. Quote Link to comment Share on other sites More sharing options...
thomaso Posted October 1, 2023 Share Posted October 1, 2023 2 hours ago, DoctorBe said: when I read the EXIF of the exported file it says jpeg quality 80%. What software do you use to get the compression quality displayed? (APhoto and the ExifTool apparently do not) Quote macOS 10.14.6 | MacBookPro Retina 15" | Eizo 27" | Affinity V1 Link to comment Share on other sites More sharing options...
Hangman Posted October 1, 2023 Share Posted October 1, 2023 Hi @DoctorBe, ExifTool correlates with the JPEG Quality Settings in Affinity Photo... Exiftool -JPEGQualityEstimate filename.jpg Processed RAW file exported as JPEG from Affinity Photo using Quality Settings of 100, 80 and 50 thomaso 1 Quote Affinity Designer 2.4.2 | Affinity Photo 2.4.2 | Affinity Publisher 2.4.2 Affinity Designer Beta 2.5.0 (2437) | Affinity Photo Beta 2.5.0 (2437) | Affinity Publisher Beta 2.5.0 (2437) MacBook Pro M3 Max, 36 GB Unified Memory, macOS Sonoma 14.4.1, Magic Mouse Link to comment Share on other sites More sharing options...
walt.farrell Posted October 1, 2023 Share Posted October 1, 2023 11 hours ago, DoctorBe said: My starting file was directly from Nikon D500 camera with jpeg quality set to the highest level. Can you supply the file from the camera so we can look at it? Quote -- Walt Designer, Photo, and Publisher V1 and V2 at latest retail and beta releases PC: Desktop: Windows 11 Pro, version 23H2, 64GB memory, AMD Ryzen 9 5900 12-Core @ 3.00 GHz, NVIDIA GeForce RTX 3090 Laptop: Windows 11 Pro, version 23H2, 32GB memory, Intel Core i7-10750H @ 2.60GHz, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU. iPad: iPad Pro M1, 12.9": iPadOS 17.4.1, Apple Pencil 2, Magic Keyboard Mac: 2023 M2 MacBook Air 15", 16GB memory, macOS Sonoma 14.4.1 Link to comment Share on other sites More sharing options...
Hangman Posted October 1, 2023 Share Posted October 1, 2023 This is what Nikon say on their website... Quote "Every time you capture an image on the camera’s sensor you record digital data. A JPEG file compresses that data and some basic editing is automatically done in the camera." And what I see in my D750 manual... So my assumption would be, as @walt.farrell is suggesting, that there is already a 'Level' of compression applied which differs depending on the camera settings but I don't know if that is the equivalent of the Quality setting in Affinity Photo editing and as such is recorded in the EXIF data in the same way. A simple test would be to run the out-of-camera JPEG through ExifTool and then open the same file in Affinity Photo, export it as a JPEG with the Quality Slider set to 100% and run that through ExifTool as well to compare the results. Quote Affinity Designer 2.4.2 | Affinity Photo 2.4.2 | Affinity Publisher 2.4.2 Affinity Designer Beta 2.5.0 (2437) | Affinity Photo Beta 2.5.0 (2437) | Affinity Publisher Beta 2.5.0 (2437) MacBook Pro M3 Max, 36 GB Unified Memory, macOS Sonoma 14.4.1, Magic Mouse Link to comment Share on other sites More sharing options...
thomaso Posted October 1, 2023 Share Posted October 1, 2023 12 hours ago, DoctorBe said: how I can truly export at 100%? Just in case: Do you notice a different file size in two exports with 80 vs. 100%? If not: If you set the quality value numerically, make sure you press the Tab or Enter key before clicking the "Export" button. Otherwise, a previously set value indicated by the slider position may be used for the export instead. Quote macOS 10.14.6 | MacBookPro Retina 15" | Eizo 27" | Affinity V1 Link to comment Share on other sites More sharing options...
DoctorBe Posted October 1, 2023 Author Share Posted October 1, 2023 11 hours ago, walt.farrell said: Can you supply the file from the camera so we can look at it? Quote Link to comment Share on other sites More sharing options...
DoctorBe Posted October 1, 2023 Author Share Posted October 1, 2023 Just now, DoctorBe said: 1 minute ago, DoctorBe said: Sorry. It's the file with the bee Quote Link to comment Share on other sites More sharing options...
- S - Posted October 2, 2023 Share Posted October 2, 2023 3 hours ago, DoctorBe said: Sorry. It's the file with the bee Although the below tag is in the file, I have never seen this tag added by Affinity Photo. [File] Comment : CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 85. I don't see that tag in D500 out-of-camera JPG images either, usually just the below tag. [Nikon] JPGCompression : Optimal Quality Therefore, I suspect this tag is being added by some other software prior to being processed with Affinity Photo. The image dimensions of your file are 3633×3051, rather than the standard 5568×3712, 4176x2784 or 2784x1856. Has the image been resized in other software and this software is possibly adding the tag? I would double-check with a new out-of-camera JPG straight out of the camera – without any other software used – that this tag is definitely not there before using Affinity Photo, but is added by Affinity Photo. Quote Link to comment Share on other sites More sharing options...
Hangman Posted October 2, 2023 Share Posted October 2, 2023 Hi @DoctorBe, Just to add to what @- S - has already mentioned above... it looks as though the file has been processed using the PHP GD Library and it has clearly been cropped since the ratio of the Bee image is 2.382:2 rather than the expected 3:2. The vast majority of the EXIF data has been stripped from the file... Taking an optimal-quality JPEG directly from the D500 I would expect the EXIF data to look more like the version on the right Actual EXIF Data Left | Expected EXIF Data Right Quote Affinity Designer 2.4.2 | Affinity Photo 2.4.2 | Affinity Publisher 2.4.2 Affinity Designer Beta 2.5.0 (2437) | Affinity Photo Beta 2.5.0 (2437) | Affinity Publisher Beta 2.5.0 (2437) MacBook Pro M3 Max, 36 GB Unified Memory, macOS Sonoma 14.4.1, Magic Mouse Link to comment Share on other sites More sharing options...
DoctorBe Posted October 2, 2023 Author Share Posted October 2, 2023 10 hours ago, - S - said: Although the below tag is in the file, I have never seen this tag added by Affinity Photo. [File] Comment : CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 85. I don't see that tag in D500 out-of-camera JPG images either, usually just the below tag. [Nikon] JPGCompression : Optimal Quality Therefore, I suspect this tag is being added by some other software prior to being processed with Affinity Photo. The image dimensions of your file are 3633×3051, rather than the standard 5568×3712, 4176x2784 or 2784x1856. Has the image been resized in other software and this software is possibly adding the tag? I would double-check with a new out-of-camera JPG straight out of the camera – without any other software used – that this tag is definitely not there before using Affinity Photo, but is added by Affinity Photo. The file goes directly into Affinity from the cameras XQD drive. Then it is cropped. Afterward, when I sent to the Nikonians site their EXIF says it was 80% JPEG Quality. Nikonian members ask why I reduce quality and I tell tehm I don't purposely do that. Those members largely use PS and other non-Affinty software and claim that their files are never reduced when uploaded to Nikonians. It's a little frustrating. Quote Link to comment Share on other sites More sharing options...
DoctorBe Posted October 2, 2023 Author Share Posted October 2, 2023 4 hours ago, Hangman said: Hi @DoctorBe, Just to add to what @- S - has already mentioned above... it looks as though the file has been processed using the PHP GD Library and it has clearly been cropped since the ratio of the Bee image is 2.382:2 rather than the expected 3:2. The vast majority of the EXIF data has been stripped from the file... Taking an optimal-quality JPEG directly from the D500 I would expect the EXIF data to look more like the version on the right Actual EXIF Data Left | Expected EXIF Data Right I uploaded 3 files to NIKONIANS photosite: direct from XQD drive, via AFFINITY uncropped, via AFFINITY cropped. All 3 showed 80% jpeg quality when EXIF files generated by NIKONIANS were examined. So not Affinity at fault, but this makes me more confused than ever since camera is set to high/fine JPEG quality. Thanks for your help everyone. Quote Link to comment Share on other sites More sharing options...
Hangman Posted October 2, 2023 Share Posted October 2, 2023 Hi @DoctorBe, I've just taken a quick random look at some other images uploaded to the NIKONIANS photosite and of the ones I reviewed none include... Quote [File] Comment : CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 85. So I'm slightly unsure where or at what stage this is being added to the EXIF data for your file. Would you be happy to ZIP one of the straight-out-of-camera JPEG files up and upload it to the forum without it touching Affinity Photo just so we can take a look at the EXIF Data straight out of the camera for comparison? Quote Affinity Designer 2.4.2 | Affinity Photo 2.4.2 | Affinity Publisher 2.4.2 Affinity Designer Beta 2.5.0 (2437) | Affinity Photo Beta 2.5.0 (2437) | Affinity Publisher Beta 2.5.0 (2437) MacBook Pro M3 Max, 36 GB Unified Memory, macOS Sonoma 14.4.1, Magic Mouse Link to comment Share on other sites More sharing options...
DoctorBe Posted October 2, 2023 Author Share Posted October 2, 2023 4 hours ago, Hangman said: Hi @DoctorBe, I've just taken a quick random look at some other images uploaded to the NIKONIANS photosite and of the ones I reviewed none include... So I'm slightly unsure where or at what stage this is being added to the EXIF data for your file. Would you be happy to ZIP one of the straight-out-of-camera JPEG files up and upload it to the forum without it touching Affinity Photo just so we can take a look at the EXIF Data straight out of the camera for comparison? This is directly from the XQD drive in the camera. thanks again. Quote Link to comment Share on other sites More sharing options...
Old Bruce Posted October 2, 2023 Share Posted October 2, 2023 3 minutes ago, DoctorBe said: This is directly from the XQD drive in the camera. thanks again. The forum software may strip out the data when you upload a JPEG. What @Hangman asked for is a zipped file from your computer, not just the JPEG. Compress the file and post the zipped file. Quote Mac Pro (Late 2013) Mac OS 12.7.4 Affinity Designer 2.4.1 | Affinity Photo 2.4.1 | Affinity Publisher 2.4.1 | Beta versions as they appear. I have never mastered color management, period, so I cannot help with that. Link to comment Share on other sites More sharing options...
DoctorBe Posted October 2, 2023 Author Share Posted October 2, 2023 12 minutes ago, Old Bruce said: The forum software may strip out the data when you upload a JPEG. What @Hangman asked for is a zipped file from your computer, not just the JPEG. Compress the file and post the zipped file. Done. Thanks. DSC_8938.JPG.zip Quote Link to comment Share on other sites More sharing options...
Hangman Posted October 2, 2023 Share Posted October 2, 2023 Hi @DoctorBe, Many thanks for the zipped file, it proves the relevant point which is that uploading images to the forum is the reason for the image compression and for stripping out the majority of the EXIF data... When I look at your unzipped out-of-camera image downloading the source file by extracting it from the HTML source it shows a quality setting of 85, whereas your zipped file shows a quality setting of 100... ...together with the full complement of EXIF data... and it would appear that uploading to the forum is adding the PHP GD Library comment to the EXIF data since it doesn't appear in your zipped file but it does in your unzipped file. -MacBook-Pro-2 JPEG Quality Settings % exiftool DSC_8938.JPG ExifTool Version Number : 12.32 File Name : DSC_8938.JPG Directory : . File Size : 13 MiB File Modification Date/Time : 2023:09:30 20:21:12+01:00 File Access Date/Time : 2023:10:02 21:15:58+01:00 File Inode Change Date/Time : 2023:10:02 21:15:56+01:00 File Permissions : -rwxrwxrwx File Type : JPEG File Type Extension : jpg MIME Type : image/jpeg Exif Byte Order : Little-endian (Intel, II) Make : NIKON CORPORATION Camera Model Name : NIKON D500 Orientation : Horizontal (normal) X Resolution : 300 Y Resolution : 300 Resolution Unit : inches Software : Ver.1.20 Modify Date : 2023:09:30 15:21:12 Artist : Y Cb Cr Positioning : Co-sited Copyright : Exposure Time : 1/250 F Number : 7.1 Exposure Program : Manual ISO : 900 Sensitivity Type : Recommended Exposure Index Exif Version : 0230 Date/Time Original : 2023:09:30 15:21:12 Create Date : 2023:09:30 15:21:12 Components Configuration : Y, Cb, Cr, - Compressed Bits Per Pixel : 4 Exposure Compensation : +1/3 Max Aperture Value : 3.2 Metering Mode : Center-weighted average Light Source : Cloudy Flash : No Flash Focal Length : 105.0 mm Maker Note Version : 2.11 Quality : Fine White Balance : Cloudy Focus Mode : Manual Flash Setting : Normal Flash Type : White Balance Fine Tune : 0 0 WB RB Levels : 2.452636719 1.384765625 1 1 Program Shift : 0 Exposure Difference : 0 Image Boundary : 0 0 5568 3712 External Flash Exposure Comp : 0 Flash Exposure Bracket Value : 0.0 Exposure Bracket Value : 0 Crop Hi Speed : DX Uncropped (5600x3728 cropped to 5600x3728 at pixel 0,0) Exposure Tuning : 0 Serial Number : 3031422 VR Info Version : 0100 Vibration Reduction : Off VR Mode : Normal Active D-Lighting : Normal Picture Control Version : 0200 Picture Control Name : Standard Picture Control Base : Standard Picture Control Adjust : Default Settings Picture Control Quick Adjust : Normal Clarity : 1.00 Brightness : Normal Hue : None Filter Effect : n/a Toning Effect : n/a Toning Saturation : n/a Time Zone : -05:00 Daylight Savings : No Date Display Format : M/D/Y ISO Expansion : Off ISO2 : 100 ISO Expansion 2 : Off Vignette Control : Normal Auto Distortion Control : Off HDR Info Version : 0100 HDR : Off HDR Level : Auto HDR Smoothing : Off HDR Level 2 : n/a Image Size RAW : Large Lens Type : D Lens : 105mm f/2.8 Flash Mode : Did Not Fire Shooting Mode : Single-Frame, Auto ISO Shot Info Version : 0239 Firmware Version : 1.20d Rotation : Horizontal Flicker Reduction Indicator : On JPG Compression : Optimal Quality AE Bracketing Steps : AE Bracketing Disabled WB Bracketing Steps : WB Bracketing Disabled ADL Bracketing Step : Normal ADL Bracketing Type : Off Photo Shooting Menu Bank : A Primary Slot : XQD Card ISO Auto Shutter Time : 1/500 s ISO Auto Hi Limit : ISO 51200 Flicker Reduction : Enable Photo Shooting Menu Bank Image Area: DX (24x16) Custom Settings Bank : A AF-C Priority Selection : Release AF-S Priority Selection : Release Number Of Focus Points : 15 Points Three-D Tracking Face Detection : Off Block Shot AF Response : 3 Focus Point Wrap : No Wrap AF Point Brightness : Auto ISO Display : Show ISO Sensitivity Grid Display : Off LCD Illumination : Off Electronic Front-Curtain Shutter: Off Reverse Indicators : - 0 + Command Dials Reverse Rotation : No Easy Exposure Compensation : Off Exposure Control Step Size : 1/3 EV ISO Step Size : 1/3 EV Exposure Comp Step Size : 1/3 EV Center Weighted Area Size : 8 mm Fine Tune Opt Matrix Metering : 0 Fine Tune Opt Center Weighted : 0 Fine Tune Opt Spot Metering : 0 Multi Selector Shoot Mode : Select Center Focus Point (Reset) Multi Selector Playback Mode : Zoom On/Off Multi Selector : Do Nothing Exposure Delay Mode : Off CL Mode Shooting Speed : 5 fps Max Continuous Release : 200 Auto Bracket Order : 0,-,+ Auto Bracket Mode M : Flash/Speed Func 1 Button : None Preview Button : Preview Assign Bkt Button : Auto Bracketing Command Dials Change Main Sub : Autofocus Off, Exposure Off Command Dials Menu And Playback : Off Command Dials Aperture Setting : Sub-command Dial Release Button To Use Dial : No Standby Timer : 1 min Self Timer Time : 10 s Self Timer Shot Interval : 0.5 s Self Timer Shot Count : 1 Image Review Monitor Off Time : 4 s Live View Monitor Off Time : 10 min Menu Monitor Off Time : 1 min Shooting Info Monitor Off Time : 10 s Flash Sync Speed : 1/250 s Flash Shutter Speed : 1/60 s Modeling Flash : On Playback Monitor Off Time : 10 s Multi Selector Live View : Reset Shutter Speed Lock : Off Aperture Lock : Off Movie Shutter Button : Take Photo Flash Exposure Comp Area : Entire Frame Auto Flash ISO Sensitivity : Subject and Background Movie Func 1 Button : None Movie Preview Button : Index Marking Func 1 Button Plus Dials : Choose Image Area (DX/1.3x) Preview Button Plus Dials : None Assign Movie Record Button Plus Dials: None Fine Tune Opt Highlight Weighted: 0 Dynamic Area AF Display : On AF Point Illumination : On During Manual Focusing Store By Orientation : Off Group Area AF Illumination : Squares Matrix Metering : Face Detection On Live View Button Options : Enable AF Mode Restrictions : AF-C Limit AF Area Mode Selection : Auto-area, Group-area, 3D-tracking, Dynamic area (153 points), Dynamic area (72 points), Dynamic area (25 points) Lens Focus Function Buttons : AF Lock Only Vertical Multi Selector : Same as Multi-Selector with Info(U/D) & Playback(R/L) Assign MB-D17 Func Button : Center-weighted Metering Assign MB-D17 Func Button Plus Dials: None AF-On Button : AF-On Sub Selector : Focus Point Selection Sub Selector Center : AE/AF Lock Sub Selector Plus Dials : None Assign Movie Subselector : AE/AF Lock Assign Movie Func 1 Button Plus Dials: None Assign Movie Preview Button Plus Dials: None Assign Movie Subselector Plus Dials: None Sync Release Mode : Sync Three-D Tracking Watch Area : Normal Subject Motion : Erratic AF Activation : AF-On Only Shutter Release Button AE-L : Off Assign MB-D17 AF-On Button : Same as Camera AF-On Button Func 2 Button : Rating Assign Movie Func 2 Button : None Roll Angle : 1.8 Pitch Angle : -22.6 Yaw Angle : -88.5 Nikon Metering Mode : Center Noise Reduction : Off Color Balance Version : 0225 Lens Data Version : 0204 Exit Pupil Position : 93.1 mm AF Aperture : 3.1 Focus Position : 0x11 Focus Distance : 0.71 m Lens ID Number : 50 Lens F Stops : 7.00 Min Focal Length : 106.8 mm Max Focal Length : 106.8 mm Max Aperture At Min Focal : 2.8 Max Aperture At Max Focal : 2.8 MCU Version : 53 Effective Max Aperture : 3.3 Retouch History : None Image Data Size : 12369286 Shutter Count : 45253 Flash Info Version : 0108 Flash Source : None External Flash Firmware : n/a External Flash Zoom Override : No External Flash Status : Flash Not Attached External Flash Ready State : n/a Flash Compensation : 0 Flash GN Distance : 0 Flash Group A Control Mode : Off Flash Group B Control Mode : Off Flash Group C Control Mode : Off Flash Group A Compensation : 0 Flash Group B Compensation : 0 Flash Group C Compensation : 0 Multi Exposure Version : 0101 Multi Exposure Mode : Off Multi Exposure Shots : 0 Multi Exposure Auto Gain : Off High ISO Noise Reduction : Normal Power Up Time : 2023:03:25 13:50:29 AF Info 2 Version : 0101 Contrast Detect AF : On AF Area Mode : Contrast-detect Phase Detect AF : Off Primary AF Point : (none) AF Points Used : (none) Contrast Detect AF In Focus : No File Info Version : 0100 Memory Card Number : 0 Directory Number : 111 File Number : 8938 AF Fine Tune : Off AF Fine Tune Index : n/a AF Fine Tune Adj : 0 AF Fine Tune Adj Tele : 0 Retouch Info Version : 0200 Retouch NEF Processing : Off User Comment : Sub Sec Time : 81 Sub Sec Time Original : 81 Sub Sec Time Digitized : 81 Flashpix Version : 0100 Color Space : sRGB Exif Image Width : 5568 Exif Image Height : 3712 Interoperability Index : R98 - DCF basic file (sRGB) Interoperability Version : 0100 Sensing Method : One-chip color area File Source : Digital Camera Scene Type : Directly photographed CFA Pattern : [Red,Green][Green,Blue] Custom Rendered : Normal Exposure Mode : Manual Focal Length In 35mm Format : 157 mm Scene Capture Type : Standard Gain Control : Low gain up Contrast : Normal Saturation : Normal Sharpness : Normal Subject Distance Range : Unknown GPS Version ID : 2.3.0.0 Compression : JPEG (old-style) Thumbnail Offset : 18052 Thumbnail Length : 12249 Creator Tool : NIKON D500 Ver.1.20 Rating : 0 MPF Version : 0100 Number Of Images : 3 MP Image Flags : Dependent child image MP Image Format : JPEG MP Image Type : Large Thumbnail (full HD equivalent) MP Image Length : 804969 MP Image Start : 12551680 Dependent Image 1 Entry Number : 0 Dependent Image 2 Entry Number : 0 Image Width : 5568 Image Height : 3712 Encoding Process : Baseline DCT, Huffman coding Bits Per Sample : 8 Color Components : 3 Y Cb Cr Sub Sampling : YCbCr4:2:2 (2 1) Aperture : 7.1 Blue Balance : 1.384766 Image Size : 5568x3712 Megapixels : 20.7 Red Balance : 2.452637 Scale Factor To 35 mm Equivalent: 1.5 Shutter Speed : 1/250 Create Date : 2023:09:30 15:21:12.81 Date/Time Original : 2023:09:30 15:21:12.81 Modify Date : 2023:09:30 15:21:12.81 Thumbnail Image : (Binary data 12249 bytes, use -b option to extract) Preview Image : (Binary data 98464 bytes, use -b option to extract) MP Image 3 : (Binary data 804969 bytes, use -b option to extract) Auto Focus : On Lens ID : AF Micro-Nikkor 105mm f/2.8D or Sigma Macro 105mm F2.8 EX DG Lens Spec : 105mm f/2.8 D Circle Of Confusion : 0.020 mm Depth Of Field : 0.011 m (0.702 - 0.714 m) Field Of View : 11.2 deg (0.14 m) Focal Length : 105.0 mm (35 mm equivalent: 157.0 mm) Hyperfocal Distance : 77.28 m Light Value : 10.5 Quote Affinity Designer 2.4.2 | Affinity Photo 2.4.2 | Affinity Publisher 2.4.2 Affinity Designer Beta 2.5.0 (2437) | Affinity Photo Beta 2.5.0 (2437) | Affinity Publisher Beta 2.5.0 (2437) MacBook Pro M3 Max, 36 GB Unified Memory, macOS Sonoma 14.4.1, Magic Mouse Link to comment Share on other sites More sharing options...
walt.farrell Posted October 2, 2023 Share Posted October 2, 2023 Also, in case it's relevant, JPEGQualityEstimate appears to be a tag/value calculated by ExifTool, not an actual value embedded by the application that produced the file. It's documented by ExifTool as an estimate of the IJG JPEG quality setting for the image, calculated from the quantization tables. 7 minutes ago, Hangman said: and it would appear that uploading to the forum is adding the PHP GD Library comment to the EXIF data since it doesn't appear in your zipped file but it does in your unzipped file. That would make sense, as the forum is probably implemented using PHP software and functions, which would be involved in saving and converting uploaded attachments. Hangman 1 Quote -- Walt Designer, Photo, and Publisher V1 and V2 at latest retail and beta releases PC: Desktop: Windows 11 Pro, version 23H2, 64GB memory, AMD Ryzen 9 5900 12-Core @ 3.00 GHz, NVIDIA GeForce RTX 3090 Laptop: Windows 11 Pro, version 23H2, 32GB memory, Intel Core i7-10750H @ 2.60GHz, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU. iPad: iPad Pro M1, 12.9": iPadOS 17.4.1, Apple Pencil 2, Magic Keyboard Mac: 2023 M2 MacBook Air 15", 16GB memory, macOS Sonoma 14.4.1 Link to comment Share on other sites More sharing options...
Hangman Posted October 2, 2023 Share Posted October 2, 2023 26 minutes ago, walt.farrell said: Also, in case it's relevant, JPEGQualityEstimate appears to be a tag/value calculated by ExifTool, not an actual value embedded by the application that produced the file. Though consistent with the JPEG quality values when exporting from Affinity apps. I think all we've really demonstrated here going back to the original question is that the quality value for the out-of-camera JPEG when using the optimal JPEG setting is shown as 100 vs the value shown when uploaded either to this forum or to the Nikonians forum. 32 minutes ago, walt.farrell said: That would make sense, as the forum is probably implemented using PHP software and functions, which would be involved in saving and converting uploaded attachments. It is, the Invision Community forum is PHP based so I think it makes perfect sense... Quote Affinity Designer 2.4.2 | Affinity Photo 2.4.2 | Affinity Publisher 2.4.2 Affinity Designer Beta 2.5.0 (2437) | Affinity Photo Beta 2.5.0 (2437) | Affinity Publisher Beta 2.5.0 (2437) MacBook Pro M3 Max, 36 GB Unified Memory, macOS Sonoma 14.4.1, Magic Mouse Link to comment Share on other sites More sharing options...
v_kyr Posted October 2, 2023 Share Posted October 2, 2023 Well, the Nikonians forum and galleries do use PHP based services too (same as the Affinity PHP driven forum here) and also for image sharings & previews. https://www.nikonians.org/about/client-image-collaboration Quote Viewing & downloading NEF, DNG or TIFF images When you are viewing raw files or TIFF's, JPG representations of these images are created "on the fly". The original file is also accessible and can be downloaded via a small icon below the image. Under NEF, DNG or TIFF images an additional icon is shown for direct download of the original file. If the image is located in an album with download enabled, a download button (for JPG download) is shown under it as well. The above already implicitely tells that JPG representations of images are created on demand (the fly). So in order to others there to see your orig images they have to use the bottom download button (orig image link) there for downloading and previewing locally on their system. Other than that, check your in Affinity as default setup JPG compression quality, if rerouting JPG images. Quote ☛ Affinity Designer 1.10.8 ◆ Affinity Photo 1.10.8 ◆ Affinity Publisher 1.10.8 ◆ OSX El Capitan ☛ Affinity V2.3 apps ◆ MacOS Sonoma 14.2 ◆ iPad OS 17.2 Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.