Difference between Image enhancement and Image Restoration

Image enhancement and image restoration are two techniques used in digital image processing to improve the visual quality of images.

The main difference is that image enhancement aims to improve the visual quality of an image by increasing its contrast, brightness, or sharpness while image restoration aims to remove or reduce the degradation or distortion that an image may have suffered during acquisition, transmission, or storage.

Before we move to the differences, let’s understand what are Image enhancement and Image Restoration:

  • Image enhancement: Image enhancement is a technique used to improve the visual quality of an image by manipulating its brightness, contrast, or sharpness.
  • Image Restoration: Image restoration is a technique used to remove or reduce the degradation or distortion that an image may have suffered during acquisition, transmission, or storage.

Image enhancement vs Image Restoration

Now, let’s move to Image enhancement vs Image Restoration:

Major differences between Image enhancement and Image Restoration

Image enhancement Image Restoration
Image enhancement methods are generally non-linear. Image restoration methods are generally linear.
Image enhancement methods may introduce artifacts. Image restoration methods aim to remove them.
Image enhancement methods work on the entire image. Image restoration methods work on selected portions of the image.
Image enhancement methods may introduce new information not present in the original image. Image restoration methods aim to recover the original information.
Image enhancement is a subjective process. Image restoration is an objective process.

 

That’s it.

Note that sometimes, the question might also be asked as “distinguish between Image enhancement and Image Restoration”.

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Final words

Image enhancement and image restoration aim to improve the quality of digital images, they differ in their approaches and objectives. Image enhancement aims to improve the visual quality of an image, while image restoration aims to remove or reduce the degradation or distortion.

Understanding the differences between these two techniques is important for selecting the appropriate method to achieve the desired image quality improvement.

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