convert Linux Command Guide

The Linux convert command is a powerful tool for converting image files between different formats, resizing images, and applying various transformations and effects. It is part of the ImageMagick suite of tools and can be used from the command line. The convert command supports a wide range of image formats and provides options for specifying output quality, resolution, and other parameters. By mastering the convert command, you can efficiently manipulate and enhance images for various projects and purposes.

convert Syntax:

convert [options] input_file output_file

Options:

Option	Description
-resize	Resize the image to the specified dimensions
-quality	Set the image quality level
-rotate	Rotate the image by the specified angle
-format	Set the output file format

Parameters:

Parameter	Description
input_file	Input image file
output_file	Output image file

Caution

Exercise caution when using the convert command as it may overwrite existing files without warning.

convert Command Samples:

Convert an Image to a Different Format

convert image.jpg new_image.png

Converts the image.jpg file to a new_image.png file.

Resize an Image

convert -resize 50% image.jpg resized_image.jpg

Resizes image.jpg to 50% and saves the resized image as resized_image.jpg.

Convert Multiple Images to a PDF

convert *.jpg output.pdf

Converts all JPEG images in the current directory to a single PDF file named output.pdf.

Rotate an Image

convert -rotate 90 image.jpg rotated_image.jpg

Rotates image.jpg by 90 degrees clockwise and saves the rotated image as rotated_image.jpg.

Create a Thumbnail Image

convert -thumbnail 200x200 image.jpg thumbnail.jpg

Creates a thumbnail of image.jpg with a size of 200x200 pixels and saves it as thumbnail.jpg.

Change Image Quality

convert -quality 80 image.jpg high_quality_image.jpg

Reduces the quality of image.jpg to 80% and saves it as high_quality_image.jpg.

Convert an Image to Grayscale

convert -colorspace Gray image.jpg grayscale_image.jpg

Converts image.jpg to grayscale and saves the grayscale version as grayscale_image.jpg.

Tip

When using the convert command in Linux, remember to check the available options and parameters in the command’s documentation to ensure proper usage and desired results.

convert FAQ:

How do I use convert in Linux?

To use the convert command in Linux, execute the following command:

convert --option <value>

What is the purpose of the convert command in Linux?

The convert command in Linux is used for image conversion and manipulation tasks like resizing, cropping, rotating, and more.

convert input.jpg -resize 50% output.jpg

How can I resize an image using convert in Linux?

You can resize an image using the convert command in Linux by specifying the desired dimensions to scale the image.

convert input.jpg -resize 800x600 output.jpg

How do I convert an image format using convert in Linux?

To convert an image format using convert in Linux, specify the output format along with the filename.

convert input.png output.jpg

Can the convert command in Linux be used to rotate images?

Yes, the convert command in Linux can be used to rotate images to the desired angle.

convert input.jpg -rotate 90 output.jpg

How do I add text to an image using convert in Linux?

To add text to an image using convert in Linux, specify the text, font, and position on the image.

convert input.jpg -pointsize 24 -draw "text 100,100 'Sample Text'" output.jpg

Applications of the convert command

• Image format conversion: converting between different image formats.
• Image resizing: changing the dimensions of an image.
• Image rotation: rotating images to different orientations.
• Image compression: reducing the file size of an image.
• Adding watermark: overlaying a watermark onto an image.
• Colorspace conversion: changing the colorspace of an image.