Thou shalt programme
To be able to watermark your RAW (CR2 and CRW) files taken using a Canon EOS camera you first need to convert them to JPG, and then add your watermark (for example your website address or your name) to them. In this post I am going to describe how to do it for free.
RAW, or to put it in terms of file extension, CR2 and CRW files are the images produced using Canon EOS cameras. A RAW photo, as it appears from it’s name, is the raw format of the image, meaning it contains the exact binary data that was recorded by a specific camera when the photo was taken.
Continue reading “How to handle Canon EOS RAW images in C++/Qt”
Updated: QImageReader class in Qt has a new method (introduced in Qt 5.5) named transformation() which you can use for this purpose but this article still applies if you are not using 5.5 or having problems with QImageRaader. Also it is a useful example on how to use GDI in Qt.
You might have also noticed that Qt reads jpg, tif and other types of images that it supports without paying any attention to EXIF information stored in them. EXIF meta data contains highly valuable information about the characteristics of a photograph. Let’s say you want to read an image file into QImage and do some process over it. It is crucial to know what type of orientation the image needs to go through right after reading it.
Continue reading “How to read image orientation in Qt (Using stored EXIF)”