tiff

I am reading a file format (TIFF) that has 32-bit unsigned offsets from the beginning of the file. Unfortunately the prototype for fseek, the usual way I would go to particular file offset, is: int fseek ( FILE * stream, long int offset, int origin ); so the offset is signed. How should I handle this situation? Should I be using a different function for seeking? You can try to use lseek64() ( man page ) #define _LARGEFILE64_SOURCE /* See feature_test_macros(7) */ #include <sys/types.h> #include <unistd.h> off64_t lseek64(int fd, off64_t offset, int whence); With int fd = fileno (stream); Notes

My VB.NET program currently takes a 4BPP TIFF as an Bitmap, converts it to a Graphic, adds some text strings and then saves it out again as a TIFF file. The output Bitmap.Save() TIFF file by default seems to be 24BPP (regardless of the input) and is a lot larger than the original TIFF. Is it possible to keep the same 4BPP palette encoding as the input for the output and if not, how can I convert my Bitmap PixelFormat from 24BPP to 4BPP Indexed. I've seen an example for converting 24 BPP to 1 BPP at http://www.bobpowell.net/onebit.htm using BitmapData.Lockbits() but cannot figure out how to do

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, because our clients and we are dealing with quite a lot of documents. Interestingly enough, I get about

I'm working on an application where the requirements call for the app to produce a TIFF image of an HTML document for storage in a document management system. I'm using ASP.NET MVC 3 and am curious if anyone else has run into similar requirements, and if so, how did you address? Thanks! GeReV This particular solution wasn't suggested in @Select0r 's comment above and I believe it's worth mentioning. I recently ran into this library on CodePlex . It's written completely in managed code without and dependencies and provides HtmlRenderer.Render() function which renders to a Graphics object. You

I have some tif files with multiple pages that I would like to convert to a single long page. i.e. a file including two pages that are each 8.5x11 would be converted to a resulting file of size 8.5x22. Is there any way to remove the page breaks? I am not asking how to convert multiple files into a single file. Ben Walker I have solved this. A good chunk of the following code comes from Scott Hanselman on this page . This C# function takes a filename for the source image and a save location for its tiff output: public static void RemovePageBreaks(string fileInput, string fileOutput) { using