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.
![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...
![How to Create a RetroPie on Raspberry Pi – Graphical Guide]()
Today we get to play amazing games on our super powered game consoles, PCs, VR headsets, and even mobile devices. While I enjoy playing new games these days, I do long for the retro gaming systems I had when I was a kid: the original Nintendo...
![iPhone-Style Passwords Using MooTools PassShark]()
Every once in a while I come across a plugin that blows me out of the water and the most recent culprit is PassShark: a MooTools plugin that duplicates the iPhone's method of showing/hiding the last character in a password field. This gem of...
![MooTools Zebra Table Plugin]()
I released my first MooTools class over a year ago. It was a really minimalistic approach to zebra tables and a great first class to write. I took some time to update and improve the class.
The XHTML
You may have as many tables as...
How about sepia tones? After all, it’s just like converting to grayscale with a different balance of red, green and blue.