TIFF图像文件格式详解(3)

小鱼儿 2022-09-30 10:59 297阅读 0赞

# **基本TIFF TAGS**    #

本页主要摘自 http://www.awaresystems.be/imaging/tiff/tifftags/baseline.html。每一个TAG均有原始链接，可以点击查看详细的描述。

这些基本Tag是所有TIFF编解码器必须支持的Tag

<table> 
 <tbody> 
 <tr> 
 <th colspan="2">码</th> 
 <th>名称</th> 
 <th>简短描述</th> 
 </tr> 
 <tr> 
 <th>十进制码</th> 
 <th>十六进制</th> 
 </tr> 
 </tbody> 
 <tbody> 
 <tr> 
 <td>254</td> 
 <td>00FE</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/newsubfiletype.html" rel="nofollow">NewSubfileType</a> </td> 
 <td> 新的子文件类型标识 LONG 长度为1 用比特来标识图像的类型 Bit0如果是1代表缩略图 Bit1如果是1代表多页图像中的某一页 Bit2如果是1代表它是透明度掩码图像 其余的位数暂时没有定义。与SubfileType的是，此Tag用比特位来区分文件类型而不是用值来区分 </td> 
 </tr> 
 <tr> 
 <td>255</td> 
 <td>00FF</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/subfiletype.html" rel="nofollow">SubfileType</a> </td> 
 <td> 子文件类型标识 SHORT 长度为1 1 全分辨率图像 2 缩小分辨率的图像 3 多页图像的某一页 过时的Tag，已不再使用。 </td> 
 </tr> 
 <tr> 
 <td>256</td> 
 <td>0100</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/imagewidth.html" rel="nofollow">ImageWidth</a> </td> 
 <td> 图像宽度 SHORT或者LONG 长度为1 </td> 
 </tr> 
 <tr> 
 <td>257</td> 
 <td>0101</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/imagelength.html" rel="nofollow">ImageLength </a></td> 
 <td>图像高度 SHORT或者LONG 长度为1 </td> 
 </tr> 
 <tr> 
 <td>258</td> 
 <td>0102</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/bitspersample.html" rel="nofollow">BitsPerSample</a> </td> 
 <td> 每个分量的Bit数 SHORT 长度为SamplesPerPixel </td> 
 </tr> 
 <tr> 
 <td>259</td> 
 <td>0103</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/compression.html" rel="nofollow">Compression</a> </td> 
 <td> 压缩类型 SHORT 长度为1 随着TIFF的不断扩张，目前支持多达几十种的压缩方式。就我个人看来，最需要关注的有以下两个值： Compression＝1： 没有压缩 Compression＝7：JPEG压缩。 如果是RGB图像并且SamplesPerPixel＝3，则是标准的有损JPEG压缩。如果是CFA图像，则是Lossless JPEG </td> 
 </tr> 
 <tr> 
 <td>262</td> 
 <td>0106</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/photometricinterpretation.html" rel="nofollow">PhotometricInterpretation</a> </td> 
 <td> 颜色空间 SHORT 长度为1 0 = WhiteIsZero. 应用于灰度或者二值图像， 0对应最亮灰度. 1 = BlackIsZero. 应用于灰度或者二值图像. 0对应最暗灰度。 2 = RGB. 正常RGB图像，存储顺序为R，G，B. 3 = Palette color. 索引图像, ColorMap必须定义，SamplesPerPixel必须1. 32803 = CFA (Color Filter Array) </td> 
 </tr> 
 <tr> 
 <td>263</td> 
 <td>0107</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/threshholding.html" rel="nofollow">Threshholding</a> </td> 
 <td>定义了转换成二值图像的阈值，忽略之</td> 
 </tr> 
 <tr> 
 <td>264</td> 
 <td>0108</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/cellwidth.html" rel="nofollow">CellWidth</a> </td> 
 <td>The width of the dithering or halftoning matrix used to create a dithered or halftoned bilevel file.</td> 
 </tr> 
 <tr> 
 <td>265</td> 
 <td>0109</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/celllength.html" rel="nofollow">CellLength</a> </td> 
 <td>The length of the dithering or halftoning matrix used to create a dithered or halftoned bilevel file.</td> 
 </tr> 
 <tr> 
 <td>266</td> 
 <td>010A</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/fillorder.html" rel="nofollow">FillOrder</a> </td> 
 <td>在同一字节中的逻辑顺序。一般不做定义，要定义的话建议用1</td> 
 </tr> 
 <tr> 
 <td>270</td> 
 <td>010E</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/imagedescription.html" rel="nofollow">ImageDescription</a> </td> 
 <td>字符串， 对图像的描述 </td> 
 </tr> 
 <tr> 
 <td>271</td> 
 <td>010F</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/make.html" rel="nofollow">Make</a> </td> 
 <td>字符串， 生产厂商的描述 </td> 
 </tr> 
 <tr> 
 <td>272</td> 
 <td>0110</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/model.html" rel="nofollow">Model</a> </td> 
 <td>字符串 </td> 
 </tr> 
 <tr> 
 <td>273</td> 
 <td>0111</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/stripoffsets.html" rel="nofollow">StripOffsets</a> </td> 
 <td> 每个Strip的偏移量 SHORT或者LONG N = StripsPerImage for PlanarConfiguration equal to 1; N = SamplesPerPixel * StripsPerImage for PlanarConfiguration equal to 2 </td> 
 </tr> 
 <tr> 
 <td>274</td> 
 <td>0112</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/orientation.html" rel="nofollow">Orientation</a> </td> 
 <td>The orientation of the image with respect to the rows and columns.</td> 
 </tr> 
 <tr> 
 <td>277</td> 
 <td>0115</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/samplesperpixel.html" rel="nofollow">SamplesPerPixel</a> </td> 
 <td>每个象素的通道数 SHORT 长度为1</td> 
 </tr> 
 <tr> 
 <td>278</td> 
 <td>0116</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/rowsperstrip.html" rel="nofollow">RowsPerStrip</a> </td> 
 <td> 每个Strip有多少行 SHORT或者LONG 长度为1。Default是无限大 StripsPerImage = floor ((ImageLength + RowsPerStrip - 1) / RowsPerStrip). </td> 
 </tr> 
 <tr> 
 <td>279</td> 
 <td>0117</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/stripbytecounts.html" rel="nofollow">StripByteCounts</a> </td> 
 <td> 每个Strip的长度 SHORT或者LONG N = StripsPerImage for PlanarConfiguration equal to 1; N = SamplesPerPixel * StripsPerImage for PlanarConfiguration equal to 2 </td> 
 </tr> 
 <tr> 
 <td>280</td> 
 <td>0118</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/minsamplevalue.html" rel="nofollow">MinSampleValue</a> </td> 
 <td>The minimum component value used.</td> 
 </tr> 
 <tr> 
 <td>281</td> 
 <td>0119</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/maxsamplevalue.html" rel="nofollow">MaxSampleValue</a> </td> 
 <td>The maximum component value used.</td> 
 </tr> 
 <tr> 
 <td>282</td> 
 <td>011A</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/xresolution.html" rel="nofollow">XResolution</a> </td> 
 <td>The number of pixels per ResolutionUnit in the ImageWidth direction.</td> 
 </tr> 
 <tr> 
 <td>283</td> 
 <td>011B</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/yresolution.html" rel="nofollow">YResolution</a> </td> 
 <td>The number of pixels per ResolutionUnit in the ImageLength direction.</td> 
 </tr> 
 <tr> 
 <td>284</td> 
 <td>011C</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/planarconfiguration.html" rel="nofollow">PlanarConfiguration</a> </td> 
 <td>How the components of each pixel are stored.</td> 
 </tr> 
 <tr> 
 <td>288</td> 
 <td>0120</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/freeoffsets.html" rel="nofollow">FreeOffsets</a> </td> 
 <td>For each string of contiguous unused bytes in a TIFF file, the byte offset of the string.</td> 
 </tr> 
 <tr> 
 <td>289</td> 
 <td>0121</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/freebytecounts.html" rel="nofollow">FreeByteCounts</a> </td> 
 <td>For each string of contiguous unused bytes in a TIFF file, the number of bytes in the string.</td> 
 </tr> 
 <tr> 
 <td>290</td> 
 <td>0122</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/grayresponseunit.html" rel="nofollow">GrayResponseUnit</a> </td> 
 <td>The precision of the information contained in the GrayResponseCurve.</td> 
 </tr> 
 <tr> 
 <td>291</td> 
 <td>0123</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/grayresponsecurve.html" rel="nofollow">GrayResponseCurve</a> </td> 
 <td>For grayscale data, the optical density of each possible pixel value.</td> 
 </tr> 
 <tr> 
 <td>296</td> 
 <td>0128</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/resolutionunit.html" rel="nofollow">ResolutionUnit</a> </td> 
 <td>The unit of measurement for XResolution and YResolution.</td> 
 </tr> 
 <tr> 
 <td>305</td> 
 <td>0131</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/software.html" rel="nofollow">Software</a> </td> 
 <td>Name and version number of the software package(s) used to create the image.</td> 
 </tr> 
 <tr> 
 <td>306</td> 
 <td>0132</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/datetime.html" rel="nofollow">DateTime</a> </td> 
 <td>Date and time of image creation.</td> 
 </tr> 
 <tr> 
 <td>315</td> 
 <td>013B</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/artist.html" rel="nofollow">Artist</a> </td> 
 <td>Person who created the image.</td> 
 </tr> 
 <tr> 
 <td>316</td> 
 <td>013C</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/hostcomputer.html" rel="nofollow">HostComputer</a> </td> 
 <td>The computer and/or operating system in use at the time of image creation.</td> 
 </tr> 
 <tr> 
 <td>320</td> 
 <td>0140</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/colormap.html" rel="nofollow">ColorMap</a> </td> 
 <td>调色板</td> 
 </tr> 
 <tr> 
 <td>338</td> 
 <td>0152</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/extrasamples.html" rel="nofollow">ExtraSamples</a> </td> 
 <td>Description of extra components.</td> 
 </tr> 
 <tr> 
 <td>33432</td> 
 <td>8298</td> 
 <td><a href="http://www.awaresystems.be/imaging/tiff/tifftags/copyright.html" rel="nofollow">Copyright</a> </td> 
 <td>Copyright notice.</td> 
 </tr> 
 </tbody> 
</table>