Marcus Chen
Compressing a photo in Paint can be done by resizing or cropping the image. To resize an image, make a copy of the image, right-click on the copy, select 'Open With', and then select 'Paint'. In the Paint toolbar, click 'Resize' under the 'Image' section, select 'Percentage' and 'Maintain Aspect Ratio', and then adjust the horizontal and vertical percentages to a value less than 100. To crop an image, make a copy of the image, right-click on the copy, select 'Open With', and then select 'Paint'. In the Paint toolbar, click on 'Select' in the 'Image' section, choose 'Rectangular Selection', and then click and drag over the image to select the desired portion. Finally, click 'Crop' to remove the unselected portions of the image.
| Characteristics | Values |
|---|---|
| Compressing a photo in Paint | Possible, but with a trade-off between image quality and file size |
| Compressing a .JPG image | Possible to a greater extent than the standard setting, but requires third-party software |
| Lossless compression methods | Available, e.g. zip, but limited in the achievable file size reduction |
| Aspect ratio preservation | Possible by keeping horizontal and vertical percentages equal |
| Image resizing | Possible by selecting "Resize" under the "Image" section, choosing "Percentage" and "Maintain Aspect Ratio," then inputting a value between 1 and 500 |
| Image cropping | Possible by selecting "Rectangular selection" or "Free-form selection" under the "Select" option in the "Image" section, then dragging over the desired area |
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What You'll Learn
How to resize an image in Paint
To resize an image in Paint, you must first open the image in the Paint program. To do this, make a copy of the image by right-clicking on it and selecting "Copy" from the drop-down menu. Then, right-click in an empty space and select "Paste" from the menu. Next, right-click on the copied image and select "Open with" from the pop-out menu, followed by "Paint".
Once your image is open in Paint, you can resize it by following these steps:
- Click on the "Resize" button in the Image section of the Paint toolbar.
- In the Resize and Skew window, select Pixels if you want to enter the exact number of pixels for the height and width. If you want to make the image smaller or larger without specific pixel dimensions, select "Percentage".
- Ensure that the "Maintain aspect ratio" option is enabled to keep the image from becoming distorted.
- Enter the desired dimensions for your image.
- Click "OK" to apply the changes.
After resizing, you can save your image by going to File > Save as and choosing the appropriate file format, such as JPEG or PNG.
It is important to note that while you can resize an image in Paint, you cannot compress it to further reduce the file size. If significant file size reduction is needed, you may need to use third-party software or online tools like Watermarkly.
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Lossless compression methods
While resizing a photo in Paint, you can use lossless compression methods to reduce the file size without compromising the image quality. Lossless compression methods do not discard any data, unlike lossy compression formats such as JPEG, which trade off data integrity for a smaller file size.
One example of a lossless compression method is Huffman encoding, which can be used in addition to JPEG compression to further compress the bytes. Optimized Huffman encoding ensures that there is no loss of data while achieving a smaller file size. This method does not reduce the quality of the image and is, therefore, a better option when compressing images.
Another lossless compression method is using a zip file. Similar to Huffman encoding, this method compresses the file size without compromising the image quality. However, there is a limit to how small the file size can become.
When using lossless compression methods, it is important to note that these formats require more storage space compared to lossy formats. This is because lossless formats store all available information without any deterioration, resulting in larger file sizes.
It is recommended to avoid using MS Paint for image compression as it tends to produce highly compressed and low-quality JPEG output. Instead, consider using alternative software such as Picasa, GIMP, Irfanview, or Xnview, which offer better compression and quality settings. These programs allow you to choose the quality settings, giving you control over the trade-off between file size and image quality.
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Cropping an image
Compressing a photo in Paint will help reduce its file size, but it will also reduce the quality of the image. To compress an image in Paint, you must first resize it.
To crop an image in Paint, follow these steps:
- Open the image in Paint by right-clicking on the image file, selecting 'Open with', and then choosing Paint.
- Once the image is open in Paint, select the 『Select』 item in the toolbar by right-clicking on it.
- Click on the upper left corner of the rectangular region you want to crop.
- Hold down the mouse button and move the mouse to the lower left corner of the rectangular region.
- Release the mouse button and click again in the rectangular region to drag the rectangle so that the upper left corner of the rectangle aligns with the upper left corner of the image in Paint.
- Finally, right-click on your selection and choose 'Crop'. This will automatically resize the canvas to your selected area.
You can also use the Windows Snipping Tool, which is pre-installed and allows you to take a cropped screenshot. Alternatively, you can use the 『Stretch/Skew』 option under the 『Image』 menu in Paint to resize the image. However, make sure to keep the horizontal and vertical percentages equal to preserve the aspect ratio of the image.
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Changing the aspect ratio
To change the aspect ratio of a photo in Paint, you must first make a copy of the image you want to resize. Do not work on the only original file you have. Then, right-click on the image file in the File Explorer, select 'Open With', and choose Paint.
Next, click on the "Image" section in the Paint toolbar and select "Resize". Make sure that "Percentage" is selected (it will have a black dot next to it) and enter a number less than 100 in the "Horizontal" text box. Keep the same number in the "Vertical" text box to preserve the aspect ratio. If you know the exact horizontal or vertical pixel count you want, you can click the circle next to "Pixels" and enter the desired values.
It is important to note that changing the aspect ratio of an image can distort it if not done properly. To maintain the aspect ratio while resizing, make sure the "Maintain aspect ratio" box is checked. This will ensure that any changes made to one aspect of the image (e.g. vertical size) will scale proportionally with the other aspects.
Additionally, when resizing an image in Paint, you can also use the "Stretch/Skew" option under the "Image" menu. This allows you to adjust the horizontal and vertical percentages independently, but be careful to keep the percentages equal to maintain the aspect ratio.
Finally, once you have made the desired changes to the image's aspect ratio, remember to save your work by going to the File menu and selecting "Save As" to save the resized image.
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Using third-party software to compress
While resizing images in Paint is possible, it may be limited and may not be the best option if you are looking to significantly compress your images without a loss in quality. In such cases, it is better to use third-party software.
One such software is Optimage, which is a powerful image optimisation tool that provides the highest compression ratio while maintaining consistent visual quality. It can resize and convert common image and video formats, and is designed to make automatic image optimisation accessible to everyone. Optimage uses novel perceptual metrics and improved encoders to reduce image size by up to 90% without compromising visual quality. It also allows you to securely remove any hidden sensitive information from photographs and documents without relying on third-party services that may collect your data. Optimage is available for macOS 10.13 and above, with a free version that allows for 24 free images per day.
Another option is ImageOptim, which is a free and open-source image compression tool that integrates well with macOS. It automatically runs several image optimisation tools and combines their results to ensure that you get the smallest file size possible. By default, ImageOptim preserves image quality, but enabling the Lossy minification option in the preferences will allow for more aggressive optimisations that yield bigger results. ImageOptim can apply lossy compression to JPEG, SVG, anim GIF, and PNG file formats.
For Windows users, a similar alternative is Mass Image Compressor, which allows you to compress multiple images at once by dragging and dropping them into the application window.
It is important to note that when compressing images, you should always work on a copy of the original file to avoid any accidental loss of quality or data.
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