tiff

问题 I am trying to convert JPEGs to TIFFs with JPEG-compression using FreeImage.Net and C#. This works fine, however, for low-quality JPGES the TIFF-files are a lot larger than the original. I assume the TIFF-size does not depend on the original JPEG-Quality, because the output-images were always about the same size. For example (converting a screenshot): 2065kb JPEG (quality: 100%) --> 1282kb TIFF 379kb JPEG (quality: 50%) --> 1200kb TIFF This increase in size is not acceptable for our company,

问题 How do i read a TIFF image using Java IMAGEIO library??(I am using Eclipse Luna)..And once i download the plugin(JAR files) how to give the Classpath so that it can read my input TIFF image file? 回答1: Here a quick example to convert a TIFF image into a PNG image. // quick conversion example File inputFile = new File("image.tiff"); File outputFile = new File("output.png"); BufferedImage image = ImageIO.read(inputFile); ImageIO.write(image, "png", outputFile); Print a list of all supported

问题 Background I have a large TIFF file that is compressed with JPEG (new, compression 7 in TIFF standard) and is tiled. What I need to do is extract these tiles to individual .jpg files. I need to be able to do this with out decompressing/recompressing the image data because that will require too much compute resources, so all libraries that I know of are out of the question. I know a lot about TIFF file structure, but almost nothing about JPEG file structure. I have code written right now that

问题 How to read a tiff file's dimension (width and height) and resolution (horizontal and vertical) without first loading it into memory by using code like the following. It is too slow for big files and I don't need to manipulate them. Image tif = Image.FromFile(@"C:\large_size.tif"); float width = tif.PhysicalDimension.Width; float height = tif.PhysicalDimension.Height; float hresolution = tif.HorizontalResolution; float vresolution = tif.VerticalResolution; tif.Dispose(); Edit: Those tiff

问题 My system is Mac OS X v10.8.2. I have several 2560x500 uncompressed 16-bit TIFF images (grayscale, unsigned 16-bit integers). I first attempt to load them using PIL (installed via Homebrew, version 1.7.8): from PIL import Image import numpy as np filename = 'Rocks_2ptCal_750KHz_20ms_1ma_120KV_2013-03-06_20-02-12.tif' img = Image.open(filename) # >>> img # <PIL.TiffImagePlugin.TiffImageFile image mode=I;16B size=2560x500 at 0x10A383C68> img.show() # almost all pixels displayed as white. Not

问题 I took a look at the Split multi-page tiff with python file for Splitting a .TIFF File, however to be honest, I didn't fully understand the answers, and I'm hoping for a little clarification. I am attempting to take a .Tif file with multiple Invoices in it and Split it into each page which will then be Zipped Up and uploaded into a database. PIL is installed on the computers that will be running this program, as such I'd like to stick with the PIL Library. I know that I can view information

问题 Is there a way to convert a HTML string into a Image .tiff file? I am using C# .NET 3.5. The requirement is to give the user an option to fact a confirmation. The confirmation is created with XML and a XSLT. Typically it is e-mailed. Is there a way I can take the HTML string generated by the transformation HTML string and convert that to a .tiff or any image that can be faxed? 3rd party software is allowed, however the cheaper the better. We are using a 3rd party fax library, that will only

问题 Stack: Java - 1.8.0_91 Scala - 2.11.8 Library - it.geosolutions.imageio-ext imageio-ext-tiff 1.1.15 We are reading lots of old TIF images and for some reason read is highly inconsistent - for some reasons on a different run reading the same image can succeed or fail with exception - javax.imageio.IIOException: Invalid component ID 3 in SOS at com.sun.imageio.plugins.jpeg.JPEGImageReader.readImage(Native Method) at com.sun.imageio.plugins.jpeg.JPEGImageReader.readInternal(JPEGImageReader.java

问题 I am trying to open a .TIFF image in python. My code is import numpy as np import matplotlib.pyplot as plt from PIL import Image photos = Image.open("haz(1,8grados).tif") photos.show() and I am getting the error TIFFSetField: tempfile.tif: Unknown pseudo-tag 65538. Can anyone help with this? I am running python 3 in Mac OS High Sierra. 回答1: This is a confirmed bug in PIL / Pillow. It is otherwise an innocent warning, and nothing you need to do differently. You can't silence the warning,

问题 How can I know if a TIFF image is in the format CCITT T.6(Group 4)? 回答1: You can use this (C#) code example. It returns a value indicating the compression type: 1: no compression 2: CCITT Group 3 3: Facsimile-compatible CCITT Group 3 4: CCITT Group 4 (T.6) 5: LZW public static int GetCompressionType(Image image) { int compressionTagIndex = Array.IndexOf(image.PropertyIdList, 0x103); PropertyItem compressionTag = image.PropertyItems[compressionTagIndex]; return BitConverter.ToInt16