Deep learning based approach for optic disc and optic cup semantic segmentation for glaucoma analysis in retinal fundus images

Optic disc and optic cup are one of the most recognized retinal landmarks, and there are numerous methods for their automatic detection. Segmented optic disc and optic cup are useful in providing the contextual information about the retinal image that can aid in the detection of other retinal features, but it is also useful in the automatic detection and monitoring of glaucoma. This paper proposes a deep learning based approach for the automatic optic disc and optic cup semantic segmentation, but also the new model for possible glaucoma detection. The proposed method was trained on DRIVE and DIARETDB1 image datasets and evaluated on MESSIDOR dataset, where it achieved the average accuracy of 97.3% of optic disc and 88.1% of optic cup. Detection rate of glaucoma diesis is 96.75

Complete Model for Automatic Object Detection and Localisation on Aerial Images using Convolutional Neural Networks

In this paper, a novel approach for an automatic object detection and localisation on aerial images is proposed. Proposed model does not use ground control points (GCPs) and consists of three major phases. In the first phase, optimal flight route is planned in order to capture the area of interest and aerial images are acquired using unmanned aerial vehicle (UAV), followed by creating a mosaic of collected images to obtained larger field-of-view panoramic image of the area of interest and using the obtained image mosaic to create georeferenced map. The image mosaic is then also used to detect objects of interest using the approach based on convolutional neural networks

The Effect of Latent Space Dimension on the Quality of Synthesized Human Face Images

In recent years Generative Adversarial Networks (GANs) have achieved remarkable results in the task of realistic image synthesis. Despite their continued success and advances, there still lacks a thorough understanding of how precisely GANs map random latent vectors to realistic-looking images and how the priors set on the latent space affect the learned mapping. In this work, we analyze the effect of the chosen latent dimension on the final quality of synthesized images of human faces and learned data representations. We show that GANs can generate images plausibly even with latent dimensions significantly smaller than the standard dimensions like 100 or 512. Although one might expect that larger latent dimensions encourage the generation of more diverse and enhanced quality images, we show that an increase of latent dimension after some point does not lead to visible improvements in perceptual image quality nor in quantitative estimates of its generalization abilities

Semantic segmentation of natural landscape images based on deep learning

Semantička segmentacija slike značajni je zadatak u području računalnog vida i strojnog učenja. Ova doktorska disertacija bavi se razvojem nove metode za semantičku segmentaciju slika prirodnog krajolika. Modifikacijom bazne konvolucijske mreže predložen je novi model za semantičku segmentaciju slika. Pri izradi modela posebna pažnja je posvećena slojevima sažimanja, koji u modelima dubokog učenja predstavljaju veliki problem zbog gubitka podataka, koji je u kasnijim slojevima mreže nemoguće vratiti. Novi model ima segment posebno zadužen za rekonstrukciju izgubljenih podataka, pa je probleme gubitka podataka sveden na minimum u odnosu na postojeće mreže. Predložen je novi završni sloj koji poboljšava rekonstrukciju piksela slike izgubljenih u slojevima sažimanja. Evaluacija modela potvrdila je početne pretpostavke. Drugi dio ove disertacija je razvoj metode za proširenje referentne baze slika prirodnog krajolika i to posebno slika koje sadrže dim požara raslinja u početnim fazama gorenja. Predložen je i evaluiran model za generiranje realističkih sintetičkih slika dima požara raslinja primjenom generičkih suparničkih mreža. Ove su slike uspješno korištene u fazi treniranja mreže za semantičku klasifikaciju slika prirodnog krajolika i to posebno regija koje predstavljaju dim požara raslinja, što će značajno unaprijediti detekciju u automatskim sustavima za rano otkrivanje požara raslinja.Semantic segmentation of regions on images is a significant task in the field of computer vision and machine learning. This doctoral dissertation deals with the development of a new method for the semantic segmentation of images of the natural landscape images. By modifying the base convolution network, a new model for semantic image segmentation is proposed. Particular attention was given to the compression layers, which in deep learning models pose a major data loss problem that is impossible to recover in later layers of the network. The new model has a segment specifically in charge of reconstructing lost data, so data loss problems are minimized over existing networks. A new final level is proposed that enhances the reconstruction of image pixels lost in the compression layers. Model evaluation confirmed the initial assumptions. The second part of this dissertation is the development of a method to extend the reference base of images of the natural landscape, especially images containing the wildfire smoke in the initial stages of burning. A model for generating realistic synthetic images of wildfire smoke using Generative Adversarial Network has been proposed and evaluated. These images have been successfully used in the training phase of the network for the semantic classification of the natural landscape images, especially the regions that represent wildfire smoke. This will probably significantly enhance detection in automated systems for early wildfire detection

Semantic segmentation of natural landscape images based on deep learning

Semantička segmentacija slike značajni je zadatak u području računalnog vida i strojnog učenja. Ova doktorska disertacija bavi se razvojem nove metode za semantičku segmentaciju slika prirodnog krajolika. Modifikacijom bazne konvolucijske mreže predložen je novi model za semantičku segmentaciju slika. Pri izradi modela posebna pažnja je posvećena slojevima sažimanja, koji u modelima dubokog učenja predstavljaju veliki problem zbog gubitka podataka, koji je u kasnijim slojevima mreže nemoguće vratiti. Novi model ima segment posebno zadužen za rekonstrukciju izgubljenih podataka, pa je probleme gubitka podataka sveden na minimum u odnosu na postojeće mreže. Predložen je novi završni sloj koji poboljšava rekonstrukciju piksela slike izgubljenih u slojevima sažimanja. Evaluacija modela potvrdila je početne pretpostavke. Drugi dio ove disertacija je razvoj metode za proširenje referentne baze slika prirodnog krajolika i to posebno slika koje sadrže dim požara raslinja u početnim fazama gorenja. Predložen je i evaluiran model za generiranje realističkih sintetičkih slika dima požara raslinja primjenom generičkih suparničkih mreža. Ove su slike uspješno korištene u fazi treniranja mreže za semantičku klasifikaciju slika prirodnog krajolika i to posebno regija koje predstavljaju dim požara raslinja, što će značajno unaprijediti detekciju u automatskim sustavima za rano otkrivanje požara raslinja.Semantic segmentation of regions on images is a significant task in the field of computer vision and machine learning. This doctoral dissertation deals with the development of a new method for the semantic segmentation of images of the natural landscape images. By modifying the base convolution network, a new model for semantic image segmentation is proposed. Particular attention was given to the compression layers, which in deep learning models pose a major data loss problem that is impossible to recover in later layers of the network. The new model has a segment specifically in charge of reconstructing lost data, so data loss problems are minimized over existing networks. A new final level is proposed that enhances the reconstruction of image pixels lost in the compression layers. Model evaluation confirmed the initial assumptions. The second part of this dissertation is the development of a method to extend the reference base of images of the natural landscape, especially images containing the wildfire smoke in the initial stages of burning. A model for generating realistic synthetic images of wildfire smoke using Generative Adversarial Network has been proposed and evaluated. These images have been successfully used in the training phase of the network for the semantic classification of the natural landscape images, especially the regions that represent wildfire smoke. This will probably significantly enhance detection in automated systems for early wildfire detection