Latest Image Processing Technical Articles

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An Introduction to Digital Signal Processing

This article provides a general understanding of what DSP is, how it works, and what advantages it can offer. To appreciate the advantages of DSP, let’s first have a look at the conventional method of signal processing, i.e., analog signal processing.

June 30, 2021 by Steve Arar

Introduction to CMOS Image Sensors

In this article, you'll learn the basics of the CMOS image sensor, including its core components, its block diagram, its strengths and weaknesses, and its applications.

November 09, 2020 by Steve Arar

What Is Dynamic Range?

The concept of dynamic range appears frequently in engineering discussions. But what exactly does this term mean? And how does it apply to electronic circuits and systems?

June 03, 2020 by Robert Keim

Determining Dynamic Range of CCD Image Sensors

This article explains how CCD construction, operating parameters, and external signal-processing circuitry contribute to the maximum variation in luminance that CCD imaging hardware can capture.

May 29, 2020 by Robert Keim

Quantum Efficiency and Signal-to-Noise Ratio in CCD Image Sensors

In this article, we’ll draw upon our knowledge of noise sources and combine it with some new information to create a comprehensive model for CCD noise performance.

May 25, 2020 by Robert Keim

Photon Noise, Read Noise, and Reset Noise in CCD Image Sensors

In this article, we’ll take a look at electrical and optical conditions that contribute to reduced image quality in CCD camera systems.

May 22, 2020 by Robert Keim

Anti-Aliasing Filters: Applying Sampling Theory to ADC Design

This article examines an important aspect of the Nyquist–Shannon sampling theorem and explains its connection to the need for anti-aliasing filters in analog-to-digital conversion.

May 20, 2020 by Robert Keim

The Nyquist–Shannon Sampling Theorem: Exceeding the Nyquist Rate

This article continues our series on sampling theory by explaining the importance of oversampling in real-life mixed-signal systems.

May 18, 2020 by Robert Keim

The Nyquist–Shannon Theorem in the Frequency Domain

This article continues our discussion of sampling theory and introduces the concept of aliasing.

May 07, 2020 by Robert Keim

CCD Binning in Imaging Systems: Increasing Signal-to-Noise Ratio and Frame Rate

This article explains a technique that allows us to incorporate flexibility into the operational parameters of a CCD imaging system.

April 20, 2020 by Robert Keim

Sampling, Amplifying, and Digitizing CCD Output Signals

In this article, we’ll see that the amount of noise in image data from a CCD sensor can be greatly reduced by a technique known as correlated double sampling.

April 09, 2020 by Robert Keim

Understanding Digital Oscilloscope Sample Rate and Analog Bandwidth Specs

In this article, we’ll examine two important specifications of a digital oscilloscope: analog bandwidth and sampling rate.

March 24, 2020 by Steve Arar

Introduction to Image Sensor Technology, from Photons to Electrons

This article, the first in a series, discusses light-sensitive electronic devices called photodiodes and compares CCD and CMOS sensors.

March 23, 2020 by Robert Keim

Image Arithmetic in DSP: Image Averaging and Image Subtraction

Learn how to employ arithmetic operations on images as a way to enhance image quality, detect changes, and reduce noise.

March 03, 2020 by Steve Arar

Use Signal Averaging to Increase the Accuracy of Your Measurements

In this article, we'll discuss the signal averaging method, a noise reduction technique, and how it can help increase the accuracy of your signal measurements.

November 04, 2019 by Steve Arar

How to Conduct Point Operations for Digital Image Processing: Using Look-up Tables

Learn how to use look-up tables to conduct point operations in digital image processing.

November 03, 2019 by Steve Arar

Digital Image Processing: Point Operations to Adjust Brightness and Contrast

In this article, we’ll first look at the basics of representing a digital image. Then, we’ll discuss some simple operations that allow us to adjust the brightness and contrast of an image. Finally, we’ll briefly look at the circuit implementation of these operations.

October 31, 2019 by Steve Arar

Low-Noise Voltage References: Understanding the Noise Performance of a Voltage Reference IC

Working with a low noise voltage reference? Learn more about noise specifications and relevant voltage reference ICs.

July 01, 2019 by Steve Arar

Quantization Noise and Amplitude Quantization Error in ADCs

Learn the methods and applications of modeling the quantization error of an ADC using a noise source.

April 22, 2019 by Steve Arar

Resolving the Signal Part 12: Reducing the Effects of Power-Supply Noise using Delta-Sigma ADCs

In part 12 of Resolving the Signal, we look at a power-supply noise design example to discuss which supplies are most critical when trying to increase a system's PSR. From that example, we offer best practices to maintain low power-supply noise and debugging tips for a system's overall noise performance.

January 29, 2019 by Bryan Lizon, Texas Instruments