Convert an Image to Grayscale with ImageMagick
A few years ago I bought a DSLR camera with a bunch of filter effects built in and it's been worth every penny. I took some incredible photos in London, Paris, and Jamaica, and tooks some really special photos of my son during his first few years. And many of my favorite photos were taken with grayscale filter but some I took in color and badly wanted them in grayscale. Of course I can use Photoshop to convert the image to grayscale but that's too much work. I have ImageMagick -- why not use the shell to very quickly convert it to grayscale?
Converting the image to grayscale with ImageMagick is simple:
convert my-image.jpg -colorspace Gray my-image-gray.jpg
The command is self-explanatory and executes in milliseconds. And since Photoshop takes a few seconds to start and I have to do the work manually, ImageMagick makes everything so much easier.
![5 More HTML5 APIs You Didn’t Know Existed]()
The HTML5 revolution has provided us some awesome JavaScript and HTML APIs. Some are APIs we knew we've needed for years, others are cutting edge mobile and desktop helpers. Regardless of API strength or purpose, anything to help us better do our job is a...
![Camera and Video Control with HTML5]()
Client-side APIs on mobile and desktop devices are quickly providing the same APIs. Of course our mobile devices got access to some of these APIs first, but those APIs are slowly making their way to the desktop. One of those APIs is the getUserMedia API...
![MooTools FontChecker Plugin]()
There's a very interesting piece of code on Google Code called FontAvailable which does a jQuery-based JavaScript check on a string to check whether or not your system has a specific font based upon its output width. I've ported this functionality to MooTools.
The MooTools...
![FileReader API]()
As broadband speed continues to get faster, the web continues to be more media-centric. Sometimes that can be good (Netflix, other streaming services), sometimes that can be bad (wanting to read a news article but it has an accompanying useless video with it). And every social service does...
How about sepia tones? After all, it’s just like converting to grayscale with a different balance of red, green and blue.