Sökning: "Alexander Hjältén"

Hittade 2 uppsatser innehållade orden Alexander Hjältén.

1. 1. HOW IMAGE DOWNSCALING AND JPEG COMPRESSION AFFECTS IMAGE CLASSIFICATION PERFORMANCE - An experimental study

   Kandidat-uppsats, Umeå universitet/Institutionen för datavetenskap

   Författare :Alexander Hjältén; [2019]
   Nyckelord :;

   Sammanfattning : th‘e quality of an image plays a role in how well it can be correctly classi€fied by an image classifying neural network. Artifacts such as blur and noise reduces classi€filability. At the same time it is oft‰en motivated to reduce fi€le sizes of images which also tends to introduce artifacts and reduce their quality. LÄS MER

3. 2. Storspiggens (Gasterosteus aculeatus) påverkan på abborryngel (Perca fluviatilis) via storleksberoende predation

   Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Författare :Alexander Hjältén; [2016]
   Nyckelord :three-spined stickleback; perch; size-dependent predation; Baltic sea; intra guild predation;

   Sammanfattning : The costal populations of perch (Perca fluviatilis) in some parts of the Baltic Sea have been in decline for about two decades. Recruitment failure in the early larval stages has been put forward as a possible cause and the decline has also been suggested to coincide with increases in three-pined stickleback (Gasterosteus aculeatus) densities. LÄS MER