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17 Apr. 2008
Here's a ColdFusion 8 function to rotate digital photographs via Exif 'orientation'. This function will accept a cfimage or a filename and return a rotated/flipped (if needed) image in cfimage format.
With ColdFusion 8's 'ImageGetEXIFMetadata' tag you can get the 'orientation' of a digital photograph. The 'orientation' value indicates if the camera was held/rotated landscape, upside down, portrait with right on the top, etc.
What makes this a bit more difficult is that there are 8 different orientation possibilities and the 'orientation' value can be a number or comma separated text. For example value 1== 'top, left side'. Full exif 'orientation' details here. Example usages of imageExifOrientationRotate:
<!--- specify image via filename ---> <cfset myImage = imageExifOrientationRotate('IMG_3087.jpg') /> <!--- resize ---> <cfset imageResize(myImage,"200","") /> <!--- display ---> <cfimage action="writeToBrowser" source="#myImage#" />
or
<!--- read image ---> <cfimage action="read" source="IMG_3087.jpg" name="myImage" /> <!--- specify image via cfimage ---> <cfset myImage = imageExifOrientationRotate(myImage) /> <!--- resize ---> <cfset imageResize(myImage,"200","") /> <!--- display ---> <cfimage action="writeToBrowser" source="#myImage#" />
View imageExifOrientationRotate function:
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