pgmbentley

Apply the Bentley Effect on a PGM image

$ pgmbentley [path/to/input_file.pgm] > [path/to/output_file.pgm]

pgmbentley [options] input.pgm [output.txt]

-t threshold
    Sets the minimum feature strength threshold. Features below this value are ignored.

-s scale
    Specifies the image scale factor before processing (e.g., 0.5 for half size).

-k value
    Adjusts the sensitivity parameter for the feature detection algorithm.

-o output_format
    Defines the output format for detected points (e.g., xy, xy_strength, json).

-v
    Enables verbose output, showing progress and detailed statistics.

This entry describes 'pgmbentley' as a specialized, hypothetical command-line utility designed to process Portable Graymap (PGM) image files. Its imagined primary function is to identify and extract "Bentley features" or "Bentley points" within an input grayscale image. These features are typically interest points or corners, crucial in computer vision for tasks such as image registration, object recognition, or tracking.

The command would theoretically implement a variant of a corner detection algorithm, similar to or inspired by techniques like the Harris corner detector, which can be historically linked to concepts developed by figures like Bentley. Users would provide a PGM image, and 'pgmbentley' would output coordinates of detected features, potentially with associated strength values. This hypothetical tool aims to provide a fast, non-interactive way to perform fundamental image analysis crucial for more complex vision pipelines, allowing for automation in batch processing of image sets. Its strength would lie in its focused purpose and seamless integration into typical Unix-like workflows.

This command is presented as a hypothetical utility. It does not exist as a standard Linux command or widely distributed open-source tool. The details provided are speculative, illustrating what such a command might entail given its presumed name.

'pgmbentley' could be used in automated image analysis pipelines where large datasets of grayscale images need to be processed for key point identification. For example, in photogrammetry or motion tracking, it could quickly extract stable reference points between frames or images to aid in alignment or reconstruction.

The command would typically output a list of detected feature coordinates (X, Y), possibly accompanied by their strength or scale, to standard output or a specified file. This plain-text output would be easily parsable by other scripts or programs for further processing.

As a hypothetical command, 'pgmbentley's history is imagined. It could have originated from a research project in computer vision focusing on efficient feature extraction from low-resolution grayscale images. Its name suggests a potential connection to early work on corner detection or image understanding, possibly developed by a team at an academic institution or a specialized engineering firm. The 'pgm' prefix implies its design around the simple and widely supported Portable Graymap format, allowing for straightforward integration into various image processing workflows without complex library dependencies. Its development might have been driven by the need for a lightweight, command-line tool for automated feature analysis in batch processing scenarios.

pgm(5), convert(1), identify(1), gimp(1)