libexif

Is there any easy way to edit jpeg marker data in-place?

拥有回忆 提交于 2019-12-12 04:48:09
问题 I am trying to edit jpeg marker data (eg: exif data) in APP0 section. I used libjpeg to decompress the source file to get exif data and uncompressed image data. I used libexif to modify exif data. Then I compressed the source image data and modified exif data to create a new jpeg file. Instead of doing decompressing and compressing again, I am wondering if there is any way to edit JPEG metadata without re-compressing the original image? (Looks like, I can call jpeg_write_header or jpeg_write

Write exif data to jpg using libexif

霸气de小男生 提交于 2019-12-07 17:14:03
问题 I'm trying to use libexif to write exif data into a jpeg file. I'm pretty much following the example provided with it. I can understand all the Exif data blocks being written and everything, but how do I load the jpeg data like they suggested? (using libjpeg). I couldn't find a function that would directly let me import the jpeg as char. My code works fine if I include a dummy jpg with it like shown below. /* * write-exif.c * * Placed into the public domain by Daniel Fandrich * * Create a new

Write exif data to jpg using libexif

半世苍凉 提交于 2019-12-05 18:33:55
I'm trying to use libexif to write exif data into a jpeg file. I'm pretty much following the example provided with it. I can understand all the Exif data blocks being written and everything, but how do I load the jpeg data like they suggested? (using libjpeg). I couldn't find a function that would directly let me import the jpeg as char. My code works fine if I include a dummy jpg with it like shown below. /* * write-exif.c * * Placed into the public domain by Daniel Fandrich * * Create a new EXIF data block and write it into a JPEG image file. * * The JPEG image data used in this example is

android image exif reader 3rd party api

一个人想着一个人 提交于 2019-11-27 12:31:44
Is there any 3rd part api for android to read exif tags from image which support api level starting from 1.5. Steve The metadata extraction library by Drew Noakes works well for extracting EXIF tags on earlier Android platform versions, with a slight modification . I am using it on Android 1.6 to extract tags from JPEG images. NOTE: Newer versions of metadata-extractor work directly on Android without modification. You will need to download and build the source code yourself, and package it with your app. (I'm using release 2.3.1.) Make the following changes to com.drew.imaging.jpeg

android image exif reader 3rd party api

僤鯓⒐⒋嵵緔 提交于 2019-11-26 16:02:47
问题 Is there any 3rd part api for android to read exif tags from image which support api level starting from 1.5. 回答1: The metadata extraction library by Drew Noakes works well for extracting EXIF tags on earlier Android platform versions, with a slight modification . I am using it on Android 1.6 to extract tags from JPEG images. NOTE: Newer versions of metadata-extractor work directly on Android without modification. You will need to download and build the source code yourself, and package it