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.
![7 Essential JavaScript Functions]()
I remember the early days of JavaScript where you needed a simple function for just about everything because the browser vendors implemented features differently, and not just edge features, basic features, like addEventListener and attachEvent. Times have changed but there are still a few functions each developer should...
![Create a Sheen Logo Effect with CSS]()
I was inspired when I first saw Addy Osmani's original ShineTime blog post. The hover sheen effect is simple but awesome. When I started my blog redesign, I really wanted to use a sheen effect with my logo. Using two HTML elements and...
![Create an Animated Sliding Button Using MooTools]()
Buttons (or links) are usually the elements on our sites that we want to draw a lot of attention to. Unfortunately many times they end up looking the most boring. You don't have to let that happen though! I recently found a...
![Image Data URIs with PHP]()
If you troll page markup like me, you've no doubt seen the use of data URI's within image src attributes. Instead of providing a traditional address to the image, the image file data is base64-encoded and stuffed within the src attribute. Doing so saves...
How about sepia tones? After all, it’s just like converting to grayscale with a different balance of red, green and blue.