- #Calculate pixel number linux imagemagick convert install#
- #Calculate pixel number linux imagemagick convert archive#
To use this repo, we just need to put the header file CImg.h into our own project folder and include it in the program. So, I tried to find a light-weight image processing processing library called CImg.
#Calculate pixel number linux imagemagick convert install#
They are not familiar with the image processing and it’s to hard for them to install OpenCV in their computer. Since this project is written for others. If it doesn't, then that means you will be getting back a zero from this function, indicating an "Undefined" orientation.To process a image, the easiest way is using a open source library. This produces an array of all properties associated with an image, and one of them will have the key value of exif:Orientation. If you're having trouble getting this function to show the value for Image Orientation, then use the function and parameters of getImageProperties('*', FALSE).
The orientation (and cameras) just have no senses for these situations." ( ) The same goes for angled or slanted shots. This really seems to be a camera thing, since the ImageMagick documentation mentions: "If you pointed your camera almost straight up or down, the EXIF orientation setting may not resolve correctly. What's the point of that? According to the official ImageMagick documentation, it's to rotate a photograph so that it is properly oriented after the shot. The EXIF Orientation is also called "the Rotation," again, according to Wikipedia. The undefined being set to 0 makes sense, since - according to Wikipedia - EXIF allows for eight possible values for an image (and not every image has a set of EXIF properties). When printed out directly, these predefined constants produce the number in parenthesis. That means you will get back an integer representation one of the Orientation constants for ImageMagick, which looks like " imagick::ORIENTATION_UNDEFINED", with "_VALUE" values of: undefined (0), topleft (1), topright (2), bottomright (3), bottomleft (4), lefttop (5), righttop (6), rightbottom (7), and leftbottom (8).
Using the getImageOrientation function, you'll get the Orientation value for an image as defined within the EXIF file format. $image -> setImageOrientation ( imagick :: ORIENTATION_TOPLEFT ) Now that it's auto-rotated, make sure the EXIF data is correct in case the EXIF gets saved with the image! $image -> rotateimage ( "#000", - 90 ) // rotate 90 degrees CCW $image -> rotateimage ( "#000", 90 ) // rotate 90 degrees CW Here's how you can use the getImageOrientation() information to auto-rotate images to their correct orientation.Ĭase imagick :: ORIENTATION_BOTTOMRIGHT :
#Calculate pixel number linux imagemagick convert archive#
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