Drawings by F. C. Houdetot: the digitised collection

		Drawings by Frédéric Christophe de Houdetot [1797-1835]

Presentation of the digitised collection

Digitised collection specification

Heading		Drawings by Frédéric Christophe de Houdetot, Bibliothèque du Conseil d'Etat
Dates		1797-1835
Volume of material		225 documents
Technical characteristics of the digitisation		Sponsorship by the Fondation Napoléon enabled all the drawings to be digitised in 1999: Each page of the original document, containing several drawings, was scanned and saved as a 16 bit, 150 dpi TIFF image and stored as a pdf file. Each drawing was then extracted, redimensioned and compressed in JPEG format for viewing on this site.
Search tools		Brief inventory of the documents (see User's Guide)

Detailed description

The technical options for digitisation and viewing

The digitisation was done taking the originals from the library of the Conseil d'Etat and scanning them on an office scanner. The binding of the album allowed the page to be placed flat on the glass of the scanner without the risk of damaging the album.
Each page was scanned manually, in colour (16 bits) with 150 dpi definition. The images were then saved in TIFF format, as a PDF file. In order to make it easy to view them on this site, and to provide a clear link with each inventory record, it was decided to present each drawing individually rather than the whole page image. Each illustration was blocked out and saved in TIFF format for the archives and redimensioned and compressed in JPEG format for viewing.

Features of the digitised collection

	Digitisation in image mode (archives)	Digitisation in image mode (site)
Name of file	Name of file and ".pdf" extension	Name of file and ".jpg" extension
Format	TIFF, saved as PDF files.	JPEG
Method of digitisation	16 bits	16 bits
Resolution	150 dpi	72 dpi
Quantity	45 images	225 images
Number of pages / file	1	1
Size of each file	6 550 Ko	Approx. 8 Ko
Use	Archives, printing.	Viewing on the internet and link with each record of the inventory
Display software required	Acrobat Reader	Navigator versions 3.0 and higher.
Examples	Page 12 Houdetot12.pdf	Portrait de M. Portalis fils hou68.jpg