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.
![Write Better JavaScript with Promises]()
You've probably heard the talk around the water cooler about how promises are the future. All of the cool kids are using them, but you don't see what makes them so special. Can't you just use a callback? What's the big deal? In this article, we'll...
![Create Namespaced Classes with MooTools]()
MooTools has always gotten a bit of grief for not inherently using and standardizing namespaced-based JavaScript classes like the Dojo Toolkit does. Many developers create their classes as globals which is generally frowned up. I mostly disagree with that stance, but each to their own. In any event...
![WebKit-Specific Style: -webkit-appearance]()
I was recently scoping out the horrid source code of the Google homepage when I noticed the "Google Search" and "I'm Feeling Lucky" buttons had a style definition I hadn't seen before: -webkit-appearance. The value assigned to the style was "push-button." They are buttons so that...
![Create WordPress Page Templates with Custom Queries]()
One of my main goals with the redesign was to make it easier for visitors to find the information that was most popular on my site. Not to my surprise, posts about MooTools, jQuery, and CSS were at the top of the list. What...
How about sepia tones? After all, it’s just like converting to grayscale with a different balance of red, green and blue.