6/22/2023 0 Comments Imagemagick compress jpg![]() To do this I select the top image, go to File, and chose Export near the bottom. Once the resizing has happened it’s time to export each image individually and set it’s compression level. Once I’m done I click the OK button and the change is adjusted on all the selected images. In this case the Width would show 750 as you just set all the images to the same width while the height would all be different and wouldn’t show a number like above. If you were resizing multiple differently sized images the fields would only show a number if they all match. Once I leave the Width field the Height field is automatically adjusted to keep the image’s aspect ratio the same. I then highlight the height, shown highlighted in purple above, and change the number to 750. This means the number in the text box refers to the pixel measurement and adjusting one field affects the other so the aspect ratio of the image stays the same. Once the popup window opens I make sure the drop-down next to the Width and Height options shows pixels and that they’re locked together. After highlighting all the images on the left side I go up into Tools and select Adjust Size to open a new popup window. This does make any portrait images taller than the landscape ones but I now prefer having all the images in one post be the same width as you scroll through. Since I keep the width and height locked together the application does the calculations on each image to keep the aspect ratio the same. Now I select all the images, regardless of it’s orientation, and, through Tools and Adjust Size, resize all of them at once to 750 pixels wide. A year or more ago I used to resize the portrait and landscape images separately by resizing their longest edge to 750 pixels. Once I’m happy with how the remaining images look I go onto the next step and resize them all. After cropping, either through the top menu or most commonly by pressing the command button and k, I was left with the new image. For instance if you look closely at the main image above you can see a dashed rectangle surrounding the cut shirt showing where I’m about to crop. I then go through the images deleting the duplicates and cropping anything extra out. I start by opening all the images within the Preview application on my Mac. This way it was easier to see the larger photos and I could better compare, delete, and crop any images I wanted to. I then highlighted all of them, right-clicked, and opened them in Preview. Each time I started out by moving all of the photos I potentially wanted to use into a directory, also known as a folder, so they’d all be in one place outside of the Photos application. My previous process when going through the photos I potentially wanted to use on my blog relied heavily on the Preview application. Resizing and Compressing Images Using Preview on My Mac…. In case you’re also interested I figured I’d go through how I resized and compressed my images individually using the Preview application on my Mac computer before then going over how I now use ImageMagick ® through my terminal to resize and compress all of the images in my directory at once. Two of the blog posts I found helpful while learning included an article called A few basic (but powerful) ImageMagick commands by Sunny Srinidhi in 2017 on Medium and Smashing Magazine’s article called Efficient Image Resizing With ImageMagick by Dave Newton. After installing it, using Homebrew through the terminal, I was able to figure out how to resize a single image and then worked on compressing all the images in my directory (or folder). I mentioned the bug to Matt while lamenting over what I should do and he recommended I look into ImageMagick ®. I’ve only gone through this process on my Mac so the images below will reflect that that said, I see the current release, at this time, of the free ImageMagick® software (version 7.0.10-57) “runs on Linux, Windows, Mac Os X, iOS, Android OS, and others” so a variant of this should work for you regardless of what device you’re on.īack when the quality slider in the Preview application stopped working for me when exporting images on my Mac I realized I wasn’t quite sure how to compress the images I needed to upload to my website’s server. Just in case you’re also looking at resizing and/or compressing your images I figured I’d share what I did with you. My husband Matt recommended I look into ImageMagick ® and after looking around online I was able to figure out how to resize multiple images at once using my terminal. I normally make my images smaller using the Preview application on my Mac so they’d take up less room on my server but a step in my process had broken and I wasn’t sure how to go about doing that anymore. Several months ago I went to compress the images I planned on uploading for my new blog post and realized that I could no longer follow the same steps I had used before.
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