WRITER IDENTIFICATION: THE EFFECT OF IMAGE RESIZING ON CNN PERFORMANCE

Introducing Deep Learning has been successful in improving the performance of automated writer identification systems. However, using very large patch sizes as input to CNN consumes a lot of machine resources and requires a lot of training time. To overcome this problem, many researchers use resized images.In this paper, we will try to make a comparative study between several patches sizes which were then resized to a normalized size of 32 × 32. Our aim is to elaborate the best recommendations for choosing the image resizing in order to increase the CNN performance. Thus, we will carry our tests on three databases. The first is CVL, a Latin dataset with 310 writers, the second is CERUG-CH a Chinese dataset with 105 writers and the last is KHATT that contains the Arabic writings of 1000 writers. To see if the type of CNN model impacts the results conducted on resized images, we deploy two models: ResNet-18 and MobileNet. The main finding is that the best results correspond to the resizing values of the images which makes it possible to have the average line height of the writings closer to the height of the CNN patches.

Johannes Hartlieb: Life and Work Before 1441: Also a Contribution to the Methodology of Writer Identification Johannes Hartlieb: Leben und Werk vor 1441: Zugleich ein Beitrag zur Schreiberidentifizierung

The identity of the Early High German author Johannes Hartlieb, who had been working as a court physician in Munich since 1441, with a pleban of the same name who was installed in Ingolstadt in 1436/37, was repeatedly called into question. The comparison of a letter of this pleban with autograph documents of the Munich court physician confirms now that both are the same person. Die Lebensstationen des frühneuhochdeutschen Autors Johannes Hartlieb vor dessen Zeit als Münchener Hofarzt (1441–1468) waren in der Forschung bislang umstritten. Durch den Schriftvergleich eines Briefes des 1436–1437 belegten Ingolstätter Plebans Johannes Hartlieb mit den autographen Dokumenten des Münchener Hofarztes, kann nun gezeigt werden, dass es sich bei beiden um dieselbe Person handeln.