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EXIF data

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T O P I C R E V I E W
clandon@apamce.com	Posted - May 01 2015 : 18:35:41 Hi, How do I retrieve the Lens Manufacturer, Image Pixels (H & V), and Image Color Depth from the EXIF data. I have tried EXIF_Pixels, EXIF_PixelXDimension, EXIF_BitsPerSample, EXIF_LensMake, and many more. I had no trouble adding ISO. I am modifying the EXIF Editor demo, trying to add the missing parameters.
20 L A T E S T R E P L I E S (Newest First)
Uwe	Posted - May 14 2015 : 17:53:53 Ah, okay. Now I understand. -Uwe
xequte	Posted - May 13 2015 : 21:34:15 Hu Uwe Yes, that is true, but in ImageEn it is only retreived for TIFF as Params.TIFF_PhotometInterpret. Nigel Xequte Software www.xequte.com nigel@xequte.com
Uwe	Posted - May 13 2015 : 10:26:19 Formatted following the TIFF specification, that is. According to the EXIFTool documentation, the PhotometricInterpretation tag may be found in "JPG, TIFF, PNG, JP2, PGF, MIFF, HDP, PSP and XCF images, as well as many TIFF-based RAW images, and even some AVI and MOV videos." -Uwe
xequte	Posted - May 13 2015 : 00:45:09 Thanks Uwe But that is a TIFF tag, so won't be available in all image formats (not the global solution he is looking for). @clandon@apamce.com: FYI I have also uploaded an XMP metadata demo: www.imageen.com/ieforum/topic.asp?TOPIC_ID=1446&whichpage=3#7882 Nigel Xequte Software www.xequte.com nigel@xequte.com
Uwe	Posted - May 12 2015 : 10:32:57 Nigel, he's looking for the tag ID 0x0106 (PhotometricInterpretation). -Uwe
clandon@apamce.com	Posted - May 12 2015 : 03:41:10 I would like to have the color space of any image I load. These may be .tiff's, .bmp, tga, or .jpg. It would tell me if they were RGB, CMYK, or other. I tried the thing you sent me and it does not produce a string or integer, so I was not able to use it.
xequte	Posted - May 11 2015 : 15:53:02 Hi Sorry, I thought you meant the color space of an image loaded (with EXIF). Can you explain your requirement more? Nigel Xequte Software www.xequte.com nigel@xequte.com
clandon@apamce.com	Posted - May 11 2015 : 02:57:12 It only works with JPEG's ?
xequte	Posted - May 10 2015 : 18:19:52 Here is the JPEG color space: http://www.imageen.com/help/TIOParamsVals.JPEG_ColorSpace.html Nigel Xequte Software www.xequte.com nigel@xequte.com
clandon@apamce.com	Posted - May 10 2015 : 02:23:53 I had noticed the T-Stop was listed for the Zeiss lens. My guess is that this is part of the Lens model or description file. There is one more thing I thought of that I would like to have, the color space. Is the image RGB, CMYK, HSV or other ?
xequte	Posted - May 07 2015 : 19:16:00 Hi I'm looking into adding these fields for the next update. There does not seem to be a field in the standard for the T-Stop. Though the camera maker may store it in a non-standard location, such as the maker notes: http://www.imageen.com/help/TIOParamsVals.EXIF_MakerNote.html Nigel Xequte Software www.xequte.com nigel@xequte.com
clandon@apamce.com	Posted - May 06 2015 : 03:08:46 Thank you very much for your help. I now have everything I really needed, but of course the lens manufacturer and model would be nice to add. Also, can you tell me about T-Stop. I know the T-Stop is in the lens description for the Zeiss lens. Are T-Stops found only in a lens model, or is there a field for it ?
xequte	Posted - May 03 2015 : 22:29:02 Also, see the source code of iexMetaHelpers, they show how to convert apex values for instance. You can also use the helper functions: http://www.imageen.com/help/iexMetaHelpers.html Nigel Xequte Software www.xequte.com nigel@xequte.com
xequte	Posted - May 03 2015 : 22:26:28 Hi Image Horizontal Pixels and Image Vertical Pixels will be EXIF_ExifImageWidth and EXIF_ExifImageHeight. I expect Image Color Depth is EXIF_ColorSpace in ImageEn (there is no color depth tag in the standard). The following tags are not yet available in ImageEn: Subject area Subject location Camera Owner Name Body Serial Number Lens Specification Lens Make Lens Model Lens Serial Number Gamma And will be added in a coming version. Nigel Xequte Software www.xequte.com nigel@xequte.com
Uwe	Posted - May 03 2015 : 19:30:02 Look at EXIF_ApertureValue in the help file. You'll have to round the APEX value accordingly. -Uwe
clandon@apamce.com	Posted - May 03 2015 : 17:14:41 Actually, it is a 24mm f/2.8 that is showing as 1. So MaxApertureValue doesn't seem to be right.
clandon@apamce.com	Posted - May 03 2015 : 17:09:53 EXIF_LensMake and EXIF_LensModel do not seem to work.
clandon@apamce.com	Posted - May 03 2015 : 17:02:53 I may have found maximum aperture. FloatToStr(EXIF_MaxApertureValue) The only problem so far is that a 1.2 lens shows as a 1 Right now I have pictures taken with only two different lenses, an f/2 and a f/1.2 the f/2 lens shows correctly.
clandon@apamce.com	Posted - May 03 2015 : 14:13:11 Oops, I'm finding a few of the things I am needing are already there. These are Color Space is probably the same as color depth; EXIF Image Height and Width seem to be the pixels H & V, and I see the focal length.
clandon@apamce.com	Posted - May 03 2015 : 11:16:37 I was just about to try uploading the images again. But I see them on the screen. So I think the upload finally took, overnight.