Remote sensing systems based on consumer-grade cameras have been increasingly used in scientific research and remote sensing applications because of their low cost and ease of use. However, the performance of consumer-grade cameras for practical applications has not been well documented in related studies. The objective of this research was to apply three commonly-used classification methods (u...

Abstract Continuous monitoring of biomass concentration in microalgae cultures is essential and one the most important parameters to measure this field. This study aims at digital image processing RGB greyscale models, being a simple low-cost method for cell estimation. Images obtained from different photobioreactors with wastewater conditions cultivation Chlorella vulgaris were analyzed. The r...

Abstract Detection of the optic disc which has similar brightness with hard and soft exudate lesions seen in early stage diabetic retinopathy is very difficult due to different light conditions contrast values. Automatic detection these by expert systems medical field important. In this context, we propose a new approach based on analysis color spaces, keypoint detectors, texture for retinal fu...

The paper discusses an approach involving digital image processing and geometric logic for recognition of two dimensional shapes of objects such as squares, circles, rectangles and triangles as well as the color of the object. This approach can be extended to applications like robotic vision and computer intelligence. The methods involved are three dimensional RGB image to two dimensional black...

The aim of the study was to develop a methodology for acquisition skin images in visible light repeatable manner, enabling an objective assessment and comparison condition before after series IPL treatments. Thirteen patients with erythematous lesions, vascular and/or rosacea were examined. Treatments aimed at reducing erythema carried out using Lumecca™ (InMode MD Ltd., Yokneam, Israel) resear...

Toxic chemicals are one of the major global issues due to their adverse effect to human health and biosystems. This present study demonstrated a CMOS image sensor based highly sensitive colorimetric sensing system for the detection various pH ranges (pH1 to 13). For the reaction, pH indicator blended with polyvinyl alcohol (PVA) and titanium (TiO2) nanoparticle; and developed the thin hydrogel ...

In this paper, a novel two-dimensional Discrete Fourier Transform based information embedding has been proposed for color image authentication (2D-DFTSDECIA). Initially, each 2 × 2 sub-image block of the carrier image is pre-adjusted, if necessary and then transformed by the application of two dimensional Discrete Fourier Transforms (2D-DFT) where the transformation technique has been applied i...

This paper proposes an effective color-difference-based (ECDB) interpolation algorithm for color filter array (CFA) image demosaicking. A CFA image consists of a set of spectrally selective filters which are arranged in an interleaved pattern such that only one color component is sampled at each pixel location. To improve the quality of reconstructed fullcolor images from CFA images, the ECDB a...

Digital still cameras use a single charge-coupled device (CCD) sensor array and a color filter array (CFA) to sample a full-color image. Thus, the measured image is an interleaving of the subsampled red, green, and blue images. The red and blue images are sampled at a lower rate, so if standard interpolation techniques are used, the reconstructed red and blue images will be missing some highfre...

Red-green-blue (RGB) channels of RGB digital photographs were loaded with luminosity-adjusted R, G, and completely white grayscale images, respectively (RGwhtB method), or R, G, and R + G (RGB yellow) grayscale images, respectively (RGrgbyB method), to adjust the brightness of the entire area of multi-temporally acquired color digital photographs of a rice canopy. From the RGwhtB or RGrgbyB pse...