When the field is left blank, it is treated as unknown. The detailed format is not specified, but it is recommended that the information be written as in the example below for ease of Interoperability.
This tag records the name of the camera owner, photographer or image creator. In Exif standard, it is the date and time the file was changed. The detailed format is not specified, but it is recommended that the example shown below be followed.
#Vb.net gpx reader software#
This tag records the name and version of the software or firmware of the camera or image input device used to generate the image. Normally this tag is not necessary, since color space is specified in the color space information tag (). The page number of the page from which this image was scanned.Ī transfer function for the image, described in tabular style. If the image resolution is unknown, 2 (inches) is designated. The precision of the information contained in the GrayResponseCurve.įor grayscale data, the optical density of each possible pixel value. If this field does not exist, the TIFF default of 1 (chunky) is assumed. In JPEG compressed files a JPEG marker is used instead of this tag. Indicates whether pixel components are recorded in a chunky or planar format. The number of pixels per in the direction. When the image resolution is unknown, 72 is designated. With JPEG compressed data this designation is not needed and is omitted. This is the number of rows in the image of one strip when an image is divided into strips. In JPEG compressed data a JPEG marker is used instead of this tag. Since this standard applies to RGB and YCbCr images, the value set for this tag is 3. The image orientation viewed in terms of rows and columns. It is recommended that this be selected so the number of strip bytes does not exceed 64 Kbytes. When the field is left blank, it is treated as unknown.įor each strip, the byte offset of that strip. This is the model name or number of the DSC, scanner, video digitizer or other equipment that generated the image. The model name or model number of the equipment. This is the manufacturer of the DSC, scanner, video digitizer or other equipment that generated the image. The manufacturer of the recording equipment.
#Vb.net gpx reader code#
When a 2-bytes code is necessary, the Exif Private tag is to be used. Two-bytes character codes cannot be used. It may be a comment such as "1988 company picnic" or the like.
The name of the document from which this image was scannedĪ character string giving the title of the image. The length of the dithering or halftoning matrix used to create a dithered or halftoned bilevel file. The width of the dithering or halftoning matrix used to create a dithered or halftoned bilevel file. In JPEG compressed data a JPEG marker is used instead of this tag.įor black and white TIFF files that represent shades of gray, the technique used to convert from gray to black and white pixels. When thumbnails use JPEG compression, this tag value is set to 6. When a primary image is JPEG compressed, this designation is not necessary and is omitted. The compression scheme used for the image data. In this standard each component of the image is 8 bits, so the value for this tag is 8. The number of columns of image data, equal to the number of pixels per row. The NewSubfileType field should be used instead. The name and version of the software used to post-process the picture.Ī general indication of the kind of data contained in this subfile.Ī general indication of the kind of data contained in this subfile. The second part of the Exiv2 key of an IFD1 tag is Thumbnail (instead of Image), the other two parts of the key are the same as for IFD0 tags. All IFD0 tags may also be present in IFD1, according to the standard. These are the Exif tags as defined in the Exif 2.3 standard.
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