Generated Barcode Image is Much Larger than Expected

For example, the height of the barcode image is set to 1 cm but after it is created it is 3 cm tall. As another example, a 300 DPI image is created and imported into other software or displayed on the screen where it appears 3 times larger than it should be.

The reason that some images appear larger on a computer screen is because the images are displayed by pixel and these images are created to be greater than 96 DPI. For example, an image at 300 DPI will be about 3 times larger and at 600 DPI would be 6 times the size, because most software will display and print images at 96 DPI, which is the computer screen display size. If a 96 DPI image were created, the sizes would be more accurate. To resolve the image size problem, examine the following solutions:

• If the IDAutomation Barcode Image Generator is being used to create static barcode images, the image can be pasted into the application at the correct size, if the “Resolution Independent Metafile” option is chosen in the "Image Properties" folder. WMF images do not contain actual pixels and instead draw to the resolution of the device.
• Choose 96 DPI when creating images.
• Import the image into a graphic application and define the size of the image in the application itself. For example, import a 600 DPI JPEG into PhotoShop and define it as a 600 DPI image.
• When creating barcodes for display in the web browser, the HEIGHT and WIDTH tags may be used to properly size the image. Please refer to the document about achieving precise X dimensions in the printed barcode using HTML.

See also:

• How to achieve a precise X dimension in the printed barcode when using a Servlet on the web
• Cannot adjust NarrowBarWidth accurately when printing with low resolution or less than 600 DPI Printers
• Product Support Index

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