Questions tagged [imageprocessing]

Image processing is any form of signal processing for which the input is an image, such as a photograph or video frame; the output of image processing may be either an image or a set of characteristics or parameters related to the image.

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Best low-cost microcontroller (that can be programmed using Python) for computer vision? [closed]

I have been researching for many days and haven't found a microcontroller that fits my needs. I want a microcontroller that: Is cheap (I want to make this into a product that can be around $20-40) ...
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Interfacing AR0237 to CYUSB3014

I'm currently creating a RGB+IR webcam application using the CYUSB3014 from Infineon with the AR0237 from OnSemi. After a bit of fiddling around with the help of the AN75779 from Infineon and the ...
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Would a program for circuit diagnostics with image recognition be useful? [closed]

I am starting to learn how to write mobile programs and came with an idea. I was wondering if there is already a smartphone program that enables you to take a picture of the circuit and it ...
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vivado HLS or SDsoc for use openCV

I want to do an image processing by openCV on FPGA . But I do not know if I should use the SDsoc method or the vivadoHLS method. The size of the images I am going to process is large and I want to ...
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Directly connecting MIPI Camera and Display

I have a little bit of a hard time wrapping my mind around MIPI. My mission: I want to connect a MIPI camera directly to a MIPI display. Camera pin-layout: Display pin-layout: The Interface of the ...
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Why is quantization defined in powers of integer multiples of two in digital image processing?

I have been studying quantization in the context of digital image processing. I referred to the 4th edition of the book titled Digital Image Processing by Rafael C. Gonzalez and Richard E. Woods. In ...
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Converting Radiant Energy to ADC Voltage

I am working on a camera sensor and was trying to get a rough estimate on if a given camera module has enough dynamic range. Fortunately I know the target and illumination source. The dynamic range I ...
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1 answer
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Synchronize IR sensor output and HDMI (FPGA)

I'm having problems when trying to synchronize output from IR camera and hdmi transmitter. I use cyclone FPGA and ulis IR sensor, for describing how I use Verilog. Sensor frame rate is 60 fps, same ...
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Input image format to Verilog [closed]

I'm working on image processing using FPGA. My aim is to begin by performing basic image processing such as brightness control, conversion to gray scale and then later on, advance to implement the ...
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Get data from FPGA Block RAM and store it as text file

I am working on Image Processing on FPGAs using Verilog. In my design I store my processed result in a Block-RAM. Is there a way in which data stored in a Block RAM be read out of it and stored as a ...
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Image processing on alinx board

I'm trying to use the Alinx board to get images from industrial cameras, process those images, and determine the size of the object showing in the image. I'll read the image using USB (from the PS ...
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2 answers
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JPEG compression benchmark on Cortex M4

I am currently using an STM32F4xx and extracting an already compressed JPEG from a camera module OV5645 as that particular sensor has an internal JPEG codec. I want to starting using a new sensor, ...
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Why do we use FIFOs and RAM in an image processing scheme?

I found a cool project (https://www.youtube.com/watch?v=aGCcT7p0-wY&lc=) which I want to replicate. This is the flow: Analog camera -> ADV7180 (it converts the video from NTSC or PAL to 8-bit ...
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How to crop/resize images in video stream on frame grabber with FPGA?

I am attempting to simply crop or resize the images as they are streamed to the frame grabber using the FPGA onboard this Euresys Coaxlink Quad CXP-12 frame grabber. The frame grabber has an XCKU035 ...
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How do I find the coefficients to know if this color combination is realizable? What am I doing wrong in my solution?

I tried to solve the following problem: Part A was solved without any problem, however with part B there is a problem: Second the digital signal processing, to be more specific, image processing, I ...
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Best way to read an image on FPGA?

Before anyone say something negative about my post, yes, i have already read a lot of other posts before i public this question (well maybe not A LOT) but still i have doubts. I'd be really glad if ...
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How to convert pixel map to voltage/angles?

My end goal is trying to get something rendered using lasers and a MEMS scanning mirror. There are not that many resources online for this, but it seems like the basic idea is pretty applicable to ...
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1 answer
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Advice needed for a final year project on wheelchair automation and control

My project partners and I have been trying to design a wheelchair for people with neuro-degenerative diseases. I know this has been done in the past, however we are using a different approach. We are ...
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1 answer
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How are objects rendered with a MEMS mirror for AR?

This question is an intersection of both hardware and software. I am trying to understand the theory of AR technology, but hitting some roadblocks and cannot find any good online resources that talk ...
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Signal processing vs image processing?

Although both are domains of EE, but what are differences between them? I am able to draw following conclusions from wikipedia article of dip and also from some other web reources 1) DIP(Digital ...
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Interpreting Fourier transform of Images

I'm new to image processing and am learning about the Fourier transform. I've read that FT decomposes a function to its constituent frequencies. However, I'm not sure how to tell which is a low ...
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3 answers
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convolution vs correlation?

Apparently this question looks better for DSP SE but I am posting it here to get answer in simple words for those EE graduates who didn't studied signal processing in undergrad. Apparently as far as ...
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Which are the physical factors that determine the maximum transportable resolution of a cable (for instance: HDMI)?

Which are the physical and electrical factors that determine that an old generation HDMI can transport for instance 1080p resolution, while a new HDMI (2.0) arrives at 4k? Is it due to a different ...
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What is the difference between kernel and filter

What is the difference between kernel and filter? (Not for CNN, in general)
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AD725: is it dot crawl - and what to do about it?

Device's datasheet says One well known distortion of composite video images is called dot crawl. It shows up as a moving dot pattern at the interface between two areas of different color. It is ...
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2 votes
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Arduino-like microcontroller with more ram for image processing [closed]

I want to build a device to perform image acquisition and processing, but I don't know which kind of board/microcontroller to use. My idea is to use a low-res camera, take a shot, analyze it and ...
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1 answer
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How can I determine a resolution of 4:2:2 YCbCr image?

I fetch data from 420 TVL camera, and now I just want to see this image, the only thing I need is resolution to draw it on my screen. How can I determine this? BWP M420MD -- camera, I'm getting DCMI ...
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What is image and video signal ?

Signal is something that carries information. Usually, something is a pattern of variations of physical quantity that can be manipulated, stored, or transmitted by a physical processes. I am wondering ...
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1 answer
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Why is the Image Sensor Board routing different?

The below posted is a open source camera project Elphel PCB layout images I have took their 353 model camera, which is mounted with an Onsemi sensor I only know that for high speed signals we go ...
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Interfacing with MIPI CSI-2 camera sensors like the Omnivision OV2732?

CSI-2 is used in pretty much every smartphone however I'm struggling to find much information on how most companies receive and control CSI-2 sensors. I understand there are NDAs. This is not for a ...
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4 answers
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brightness algorithm for VHDL [closed]

Hi I am working on an image processing project in which I try to change brightness of a pixel. The code I wrote works but not in the way I want it to be. Here is the code segment I use to change ...
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1 answer
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efficiency and speed in image processing with FPGA

Hi I have been writing a code in VHDL for some image processing. However, due to some reasons I have not yet determined the sythesis does not stop. I suspect that efficiency of the code is not as much ...
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What type of sensors are these? [closed]

I saw this sensors in an YouTube video where these things were glued to Glenn Maxwell's dress and his whole movement was monitored for the making of a cricket game.
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Opening and reading pixel values from bitmap images in Modelsim

How do I open a bitmap image, read the pixel data (24 bits) and store it in a memory that I created in a Verilog module in ModelSim? How do I open the below image in Modelsim? Is it possible in the ...
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Video compression using low power processor

I'm trying to build a hand held camera with video recording feature. Basic features of camera are Resolution: 640x480 Frame rate: 25/30Hz Video format from sensor: 8-bit grey scale BT.656 (Sensor ...
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Extract a motion filter using camera movement in number of pixel and angle, in VHDL or Verilog

I have read some papers about the topic and searched some MATLAB algorithm. There is one called 'fspecial' in MATLAB. And it could return a Motion filter, when motion is given in number of pixel and ...
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Rolling shutter effect simulation on matlab

Hi I'm doing a simulation of the rolling shutter effect on matlab, in this case the image of the propeller is distorted, and I tried use a DC motor to simulate the plane's engine at home and filmed ...
2 votes
2 answers
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What does Burst-size of a SDRAM means? [closed]

I am currently working with real-time image processing in FGPA. I have some timing problems about the classical FFT algorithm. i.e : FFT of one images spends more time than one frame period time. I ...
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Load image into VHDL testbench

Is there a standard way to load an image into VHDL testbench so image processing logic output can be tested? Obviously there will be an output from the testbench, also an image that must be possible ...
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designing image debayer block, how should the testbench be written

A debayer block inputs image from a CCD Bayer filter and then estimates the missing color information for each pixel. The data comes from a camera. How should one go about writing a testbench for ...
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Image sample rate

How to understand sample rate in case of images, it is clear to me when we are talking about the audio, but how these two are related? Is it more complex than the audio sampling?
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X-ray back-projection for conversion to hard-field magnetic induction tomography?

This is a question about hard-field back-projection as used in x-ray tomography, but applied to magnetic induction tomography (MIT). Al-Zeibak and Saunders (A feasibility study of in vivo ...
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Why FPGA is being used on VR (Virtual Reality) devices? [closed]

I have seen a number of data sheets of VR devices and many are being powered by FPGAs. Is there any specific reason for this? Why not to use an ASIC or a simple CPU, embedded processor or whatever? ...
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Is it possible to take a picture from a paper with infrared image sensor without lighting? [closed]

I'm going to make a device which will take a picture from a paper which contains a line of English characters and then process the picture with OCR to get some information in micro-controller. My idea ...
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Image reading in FPGA

I'm a newbie to FPGA stuffs and I'm using Zybo board.I need to read image stored in a hex file by FPGA and save the processed result in a hex file again. How can I implement this? How can I connect ...
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3 answers
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Flip the image of OLED 128x64 0.96 inch display

I am looking for a method to flip the image of an OLED 128x64 0.96 inch (with SSD1306 driver) display. It is the one I have with 4 pins only (image found on Internet): What I want to do is: Are ...
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1 answer
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What type of processor will I need to control a mobile front camera? [closed]

I have a mobile front camera (like this one). I want to build a wearable camera out of it (like this one). However I want to make this from scratch and not have to resort to using a Raspberry Pi. ...
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In an RGB scene, why can we assume color difference images are band-limited?

A common assumption in image processing is that the difference between two color channels of the same scene are band-limited. For instance, the interpolation method used in Hirakawa's paper ...
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3 votes
2 answers
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Open a picture and read its Pixel Values

I want to calculate the Histogram of an Image is grayscale color mode I have designed a memory and a Calculator of Histogram value, now I want to get Pixel values and put them in Calculator as Input ...
1 vote
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JPEG compression on Cortex M4

Is it possible to perform JPEG compression on a Cortex-M4 MCU? Are there existing libraries that can do this and can accept a 10-bit RAW RGB?
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