If your Android app uses the device camera to take a picture and then resizes it (this is very, very common to reduce the size for upload), you might not realize that this resize operation strips the Exif metadata. This can cause problems, especially if the device in question relies on the ‘Orientation’ tag to … Read more
I would like to write a small program in C# which goes through my jpeg photos and, for example, sorts them into dated folders (using MY dating conventions, dammit…). Does anyone know a relatively easy way to get at the EXIF data such as Date And Time or Exposure programatically? Thanks! Answer As suggested, you … Read more
I am using the following code to rotate an uploaded jpeg image if the orientation is off. I am only having problems with images uploaded from iPhones and Android. if(move_uploaded_file($_FILES[‘photo’][‘tmp_name’], $upload_path . $newfilename)){ chmod($upload_path . $newfilename, 0755); $exif = exif_read_data($upload_path . $newfilename); $ort = $exif[‘IFD0’][‘Orientation’]; switch($ort) { case 3: // 180 rotate left $image->imagerotate($upload_path . … Read more
Canon DSLRs appear to save photos in landscape orientation and uses exif::orientation to do the rotation. Question: How can imagemagick be used to re-save the image into the intended orientation using the exif orientation data such that it no longer requires the exif data to display in the correct orientation? Answer Use the auto-orient option … Read more
Closed. This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 8 years ago. Improve this question I’m looking for good exif (Exchangeable image file format) manipulation library for python. I prefer flexibility … Read more
I was wondering if PNG contains data like the following? What I did was to convert the jpg file to png format, and I was expecting to retrieve the same info I had on the jpg as below: Currently using this as3 library to read the data. IDF0— IDF @[134 – 248] (9 entries) Orientation … Read more
I’d like to rotate photos based on their original rotation, as set by the camera in JPEG EXIF image data. The trick is that all this should happen in the browser, using JavaScript and <canvas>. How could JavaScript access JPEG, a local file API object, local <img> or remote <img>, EXIF data to read the … Read more
I’m using PIL. How do I turn the EXIF data of a picture into a dictionary? Answer You can use the _getexif() protected method of a PIL Image. import PIL.Image img = PIL.Image.open(‘img.jpg’) exif_data = img._getexif() This should give you a dictionary indexed by EXIF numeric tags. If you want the dictionary indexed by the … Read more
I want to remove the EXIF information (including thumbnail, metadata, camera info… everything!) from JPEG files, but I don’t want to recompress it, as recompressing the JPEG will degrade the quality, as well as usually increasing the file size. I’m looking for a Unix/Linux solution, even better if using the command-line. If possible, using ImageMagick … Read more
Digital camera photos are often saved as JPEG with an EXIF “orientation” tag. To display correctly, images need to be rotated/mirrored depending on which orientation is set, but browsers ignore this information rendering the image. Even in large commercial web apps, support for EXIF orientation can be spotty 1. The same source also provides a … Read more
