exif

EXIF Orientation Issue in Safari Mobile

由 感情迁移 提交于 2020-06-23 07:59:29
问题 I have an angular 2 application in production environment that allows you to choose a profile picture. Recently, performing tests with safari mobile, specifically for IOS 13.3.1 version(older) and IOS 13.4.1(new) version. I noticed that the image is shown rotated depending of safari browser version used (I built a stackblitz for this that you can review): IOS 13.3.1 version(older) IOS 13.4.1(new) When I take images from an iPhone's in portrait mode and upload the image to my app it is shown

How reading exif metadata from file

由 给你一囗甜甜゛ 提交于 2020-05-17 08:47:09
问题 I'm trying to implement the following Exif reading library with as3, but I can't load the browsed file. In the library example they use loader.load(new URLRequest("http://www.example.com/sample.jpg")); for loading the image, the problem in my application is that the file is selected by a file-browser in a local computer. I tried a fileReference.name but it doesn't work, the only way that I found to make my test, is putting a file in the same directory than the .swf like this : loader.load(new

How reading exif metadata from file

由 有些话、适合烂在心里 提交于 2020-05-17 08:46:58
问题 I'm trying to implement the following Exif reading library with as3, but I can't load the browsed file. In the library example they use loader.load(new URLRequest("http://www.example.com/sample.jpg")); for loading the image, the problem in my application is that the file is selected by a file-browser in a local computer. I tried a fileReference.name but it doesn't work, the only way that I found to make my test, is putting a file in the same directory than the .swf like this : loader.load(new

How do you download an image and extract Exif data using Python PIL?

由 核能气质少年 提交于 2020-04-30 07:35:56
问题 I am trying to read the Exif data from a downloaded image. I save the image to my computer in one function then try to read the data in another function, but I keep getting a bad mode error. I have been able to read the data from a pre saved image and just used ._getexif() but when I try to do the same thing with the image I download it does not work. What am I doing wrong? Here is the loop that calls the two functions. else: imgTags = findImages(url) for imgTag in imgTags: imgFileName =

How do you download an image and extract Exif data using Python PIL?

由 て烟熏妆下的殇ゞ 提交于 2020-04-30 07:35:27
问题 I am trying to read the Exif data from a downloaded image. I save the image to my computer in one function then try to read the data in another function, but I keep getting a bad mode error. I have been able to read the data from a pre saved image and just used ._getexif() but when I try to do the same thing with the image I download it does not work. What am I doing wrong? Here is the loop that calls the two functions. else: imgTags = findImages(url) for imgTag in imgTags: imgFileName =

How to write CUSTOM metadata into JPEG with Python?

由 孤者浪人 提交于 2020-03-19 05:08:26
问题 How to write CUSTOM metadata into JPEG with Python? I tried import piexif exif_dict = { 'uwi': myvalue1, 'activity_type': myvalue2, 'prediction': myvalue3, 'url_current': myvalue4, 'url_previous': mavalue5 } exif_bytes = piexif.dump(exif_dict) with open(filename, "w") as fp: test_image.save(fp, "JPEG", exif=exif_bytes) but see nothing in images with XnView . What am I doing wrong? P.S. I don't need to write camera model, exposure and other stuff. I want to write my own custom metadata. 回答1:

C# 获取图片的EXIF 信息

由 若如初见. 提交于 2020-03-16 06:37:25
C# 获取图片的EXIF 信息 分类： 自创 2010-04-10 12:48 1793人阅读 评论 (8) 收藏 举报 c# string byte image 制造 算法 关于 EXIF 信息的介绍。 1 EXIF，是英文Exchangeable Image File(可交换图像文件)的缩写。EXIF是一种图像文件格式，只是文件的后缀名为jpg。EXIF信息是由数码相机在拍摄过程中采集一系列的信息，然后把信息放置在jpg文件的头部，也就是说EXIF信息是镶嵌在JPEG图像文件格式内的一组拍摄参数，主要包括摄影时的光圈、快门、ISO、日期时间等各种与当时摄影条件相关的讯息，相机品牌型号，色彩编码，拍摄时录制的声音以及全球定位系统（GPS）等信息。不管是硬件厂商的配套软件还是专业名门的看图工具，所有这些软件都是为了方便数码摄影者能更方便地保存查看摄影图像的重要信息。 2 如何获取EXIF信息 在.NET中，我们可以用PropertyItem对象来获取jpg 图片的EXIF信息。取得PropertyItem很简单。 Image img = Image.FromFile("支持Exif的图片文件路径"); PropertyItem[] pt = img.PropertyItems; 这样就可以了，Exif信息都已载入到PropertyItem数组中了。其中PropertyItem的ID

如何处理iOS中照片的方向

由 自闭症网瘾萝莉.ら 提交于 2020-03-12 19:22:13
使用过iPhone或者iPad的朋友在拍照时不知是否遇到过这样的问题，将设备中的照片导出到Windows上时，经常发现导出的照片方向会有问题，要么横着，要么颠倒着，需要旋转才适合观看。而如果直接在这些设备上浏览时，照片会始终显示正确的方向，在Mac上也能正确显示。最近在iOS的开发中也遇到了同样的问题，将拍摄的照片上传到服务器后，再由Windows端下载该照片，发现手机上完全正常的照片到了这里显示的横七竖八。同一张照片为什么在不同的设备上表现的不同？如何能够避免这种情况？本文将和大家一一解开这些问题。 目录 照片的存储演变 胶片时代 数码时代 方向传感器 EXIF(Exchangeable Image File Format) Orientation iPhone上的情况 验证EXIF Mac平台 Windows平台 开发时如何避免 直观的解决方案 第二种简单的方法 结尾 照片的存储演变 一切都得从相机的发展开始说起。 胶片时代 一般相机拍摄出来的画面都是长方形，在拍摄的那一瞬间，它会将取景器中的场景对应的颜色值存到对应的像素位置。相机本身并没有任何方向的概念，只是使用者想要拍摄的场景在他期望的照片中显示的方式与实际存在差异时，才有了方向一说。如下图，对一个场景F进行拍摄，相机的方向可能会有这样四个常见的角度： 相机是“自私”的，由于相机仅反应真实的场景，它不理解拍摄的内容

JPEG文件头分析

由 北城余情 提交于 2020-03-11 02:37:07
JPEG文件头分析 说明 jiff和exif的基本样式 jiff app0标记段 exif app1标记段 SOF标记段 解析jpeg 说明 1 jpeg是一种压缩标准，大幅度缩小数据流，jpeg以FF D8开头，FF D9结束。 2 jpeg图像由多个maker组成，多个maker+compressed组成了jpeg。 3 jiff是一种在万维网上进行jpeg传输的格式，可以理解是对jpeg图片的封装，符合jpeg标准，jiff的maker是app0，记录了图像的基本信息，也可能有缩略图。jiff格式比较老，老式的数码相机使用此格式。 4 exif新比较新的jpeg封装格式，exif的maker是app1，记录了更多的东西，如ISP信息、GPS信息、相机信息，图像旋转等等 5 jiff和exif可以共存，很多jpeg图像都有app0的jiff段和app1的exif段 jiff和exif的基本样式 jiff app0标记段 exif app1标记段 SOF标记段 此标记段解析图像宽高 解析jpeg 1 libjpeg开源库只能解析jiff格式的jpeg，不过jiff格式比较简单，我们也可以根据格式自己解析。 2 jhead可以解析exif格式的jpeg，exif标记段比较复杂，信息较多，参考了此开源库做了解析。 来源： CSDN 作者： 木木林19 链接： https://blog

Batch copy metadata from one file to another (EXIFTOOL)

由 て烟熏妆下的殇ゞ 提交于 2020-02-25 04:35:28
问题 Im currently using tags such as exiftool -FileModifyDate(<)datetimeoriginal, etc. in terminal/cmd... Im switching from icloud and the dates in the metadata are exif (meaning finder and windows explorer just see the date they were downloaded).. It's working but for any sloMo videos that are M4V, they dont change.. I have the originals which do have the right dates and was wondering if there is a way to match file names (123.mp4 = 123.m4v) and copy the metadata over... But I also want to do it
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