BPS follows the rules of the WCPF & PAGB and adheres to the following definitions. These apply to all BPS competitions where a category has been applied:
A black and white work fitting from the very dark grey (black) to the very clear grey (white) is a monochrome work with the various shades of grey.
A black and white work toned entirely in a single colour will remain a monochrome work able to stand in the black and white category.
On the other hand a black and white work modified by a partial toning or by the addition of one colour becomes a colour work (polychrome) to stand in the colour category.
All images other than those above are defined as colour images.A black and white image which has been modified by the addition of partial toning or by the addition of one colour to any part of the image is a Colour Image.
Nature photography is restricted to the use of the photographic process to depict all branches of natural history, except anthropology and archeology, in such a fashion that a well-informed person will be able to identify the subject material and certify its honest presentation. The story telling value of a photograph must be weighed more than the pictorial quality while maintaining high technical quality. Human elements shall not be present, except where those human elements are integral parts of the nature story such as nature subjects, like barn owls or storks, adapted to an environment modified by humans, or where those human elements are in situations depicting natural forces, like hurricanes or tidal waves. Scientific bands, scientific tags or radio collars on wild animals are permissible. Photographs of human created hybrid plants, cultivated plants, feral animals, domestic animals, or mounted specimens are ineligible, as is any form of manipulation that alters the truth of the photographic statement.
No techniques that add, relocate, replace, or remove pictorial elements except by cropping are permitted. Techniques that enhance the presentation of the photograph without changing the nature story or the pictorial content, or without altering the content of the original scene, are permitted including HDR, focus stacking and dodging/burning.
Techniques that remove elements added by the camera, such as dust spots, digital noise, and film scratches, are allowed. Stitched images are not permitted. All allowed adjustments must appear natural. Color images can be converted to greyscale monochrome. Infrared images, either direct-captures or derivations, are not allowed.
Images used in Nature Photography competitions may be divided in two classes: Nature and Wildlife. Images entered in Nature sections meeting the Nature Photography Definition above can have landscapes, geologic formations, weather phenomena, and extant organisms as the primary subject matter. This includes images taken with the subjects in controlled conditions, such as zoos, game farms, botanical gardens, aquariums and any enclosure where the subjects are totally dependent on man for food.
Images entered in Wildlife sections meeting the Nature Photography Definition above are further defined as one or more extant zoological or botanical organisms free and unrestrained in a natural or adopted habitat. Landscapes, geologic formations, photographs of zoo or game farm animals, or of any extant zoological or botanical species taken under controlled conditions are not eligible in Wildlife sections. Wildlife is not limited to animals, birds and insects. Marine subjects and botanical subjects (including fungi and algae) taken in the wild are suitable wildlife subjects, as are carcasses of extant species.
Wildlife images may be entered in Nature sections of Exhibitions.
Photo Travel Images
A Photo Travel image expresses the characteristics or culture of a land as they are found naturally. There are no geographic limitations. Images from events or activities arranged specifically for photography, or of subjects directed or hired for photography are NOT appropriate. Close up pictures of people or objects must include features that provide information about the environment. Techniques that add, relocate, replace or remove any element of the original image, except by cropping are not permitted. The only allowable adjustments are removal of dust or digital noise, restoration of the original scene, and complete conversion to greyscale monochrome. Other derivations including infrared are not permitted. All permitted adjustments must appear natural.