GRO File – What is .gro file and how to open it?


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GRO File Extension

Graphic Object Bitmap – file format by Hewlett-Packard

GRO (Graphic Object Bitmap) is a raster graphics file format developed by Hewlett-Packard. It stores bitmap images in a compressed format and is commonly used for storing images in HP plotters.

What is a GRO File?

A GRO file is a graphic object bitmap file format used by Hewlett-Packard (HP) calculators and peripherals. It stores bitmap images in a monochrome (black-and-white) format, making them suitable for simple graphics and text displays. GRO files are typically small in size and have a resolution of 128×48 pixels. They are commonly used to display icons, menus, and other graphic elements in HP calculators and handheld devices.

Technical Details of GRO Files

GRO files are binary files with a simple header structure. The header contains information about the image’s size, resolution, and other attributes. The image data is stored in a compressed format using a proprietary algorithm developed by HP. Each pixel is represented by a single bit, resulting in a compact file size. GRO files can be converted to other image formats, such as BMP or PNG, using specialized software tools or online converters.

Opening GRO Files

GRO files can be opened using various software applications, depending on the specific operating system. On Windows systems, the File Viewer Plus can be used to view GRO files. It provides a seamless and user-friendly interface for browsing and navigating the contents of GRO files. Additionally, XnView is another popular option for Windows users, offering advanced image viewing and editing capabilities.

For Mac users, GRO files can be opened using Preview, a versatile application that supports a wide range of file formats. It allows for basic image manipulation, such as resizing and cropping, making it suitable for quickly viewing GRO files. Alternatively, GIMP (GNU Image Manipulation Program) is a robust open-source software that provides advanced image editing features. Its compatibility with GRO files enables Mac users to perform more complex operations on these images.

Overview of GRO File Format

GRO (Graphic Object Bitmap) is a raster image file format developed by Hewlett-Packard (HP) for use with its HP LaserJet printers. It is a proprietary format designed for storing high-resolution images with lossless compression. GRO files typically contain monochrome (black and white) images, although they can also support grayscale and color images.

GRO files employ a raster-based storage method, where the image is represented as a grid of individual pixels. Each pixel is assigned a single bit, indicating whether it is black or white. This simple and efficient representation allows for fast rendering of images and efficient storage of monochrome graphics. The lossless compression used in GRO files ensures that no data is lost during the compression process, resulting in high-quality images that are identical to the original source.

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