They are then stacked one on top of the other and compressed, in this instance using HeliconFocus, resulting in a single image with a consistent depth of focus throughout the image area, as seen in figures two and three. Focus stacking is a process by which multiple images of the same object are shot at varying focal depths. Once complete, the multiple photos were processed incorporating a technique referred to as focus stacking using the HeliconFocus application. This was achieved by taking multiple shots, gradually adjusting the focus of the camera throughout the entire focal range of the object. Prior to commencing with photography of 3D objects, and in consultation with other stakeholders, the decision was taken to maintain a consistent depth of field throughout the image area. Our studios are continually evolving to accommodate other photographic shoots which often renders static configurations impractical. When objects were unable to be delivered in size or type order there were potential implications regarding time and studio availability. Typically, a 2D object was photographed flat, meaning the camera was mounted vertically, perpendicular to the object, while 3D items were photographed at various angles depending upon the desired effect. The way in which items were stored and referenced dictated the order in which they were physically delivered to the studio and as a consequence, a different photographic configuration was required at any given time. While the techniques employed to photograph the collection were not unique, the fact that the items differed in size and type, meant several different photographic approaches were taken. As a consequence, this required reconfiguration of both the camera and lighting depending upon the type of object, 2D or 3D. As the item numbers were grouped into batches, they were not necessarily grouped into size or type order. However, the contents within each library reference number can vary greatly, from a single item to multiple objects, both flat or three dimensional. Henry Wellcome’s personal archive consists of approximately 100 library reference numbers. Appropriate handling of each object was paramount to mitigate any potential damage and on occasion additional handling assistance was required by a conservator or member of the photographic team. If an item was determined to be too fragile or potentially vulnerable, it was sent to conservation for evaluation and, where possible, repaired prior to delivery. Prior to photography, all objects were assessed by the stakeholders, conservators and photographers to determine which items required attention prior to delivery. Examples of several objects photographed to date.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |