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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PID algorithm implementation using computer vision

I am constructing an automatic labyrinth maze solver, and using a webcam to control my maze. Based on suggestions in other forums, I am trying to control maze's ball movement at least in one ...
Sai's user avatar
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6 votes
1 answer
444 views

Using an inertial measurement unit to compute global motion optical flow of video [closed]

I have a camera rigidly mounted together with an IMU that consists of 2-dof gyroscopes and 3-dof accelerometers. My aim is to compute the global optical flow of the image captured by the camera, in ...
Ang Zhi Ping's user avatar
5 votes
5 answers
517 views

M.S. Math to Engineering Ph.D : Mathematics in Electrical Engineering [closed]

I have two Bachelor's degrees. One is electrical engineering and the other one is mathematics. I am studying mathematics (partial differential equations) in the graduate school (Master course) now. ...
Kim's user avatar
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5 votes
0 answers
741 views

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 ...
BenAdamson's user avatar
4 votes
7 answers
896 views

Is FPGA the right way to go for recognizing cards from a desk?

I'm building a playing card dealing machine and I would like to get some advice in regards how I should do with my image processing. The card will be scanned and depending on the suit and rank of the ...
StefanE's user avatar
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4 votes
2 answers
9k views

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 ...
doner_t's user avatar
  • 125
4 votes
3 answers
461 views

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 ...
DSP_CS's user avatar
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4 votes
2 answers
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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 ...
Brendan Darrer's user avatar
4 votes
3 answers
4k views

Good FPGA / Microcontroller development board for real time image processing [closed]

I have been working with OpenCV on Desktop environment for the past one year and now I want to shift to dedicated hardware for my real time image processing applications. I have the following ...
rotating_image's user avatar
4 votes
5 answers
7k views

jpeg images in STM32 internal flash

I'm using both STM32F103 and STM32F407 with a SEPS525 SPI driven OLED display (160x128). I want to store images to display in internal flash, but BMP uncompressed images with 16bit colors are huge (...
user3162481's user avatar
4 votes
2 answers
772 views

Development Board / Micro-controller with an onboard camera or external addon

I wanted to use a micro-controller with a camera module to be able to do some processing on the captured images. The Arduino was my choice, but since it has only 256K of Flash memory, it clearly is ...
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4 votes
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Amorphous Silica Electrical Impedance Tomography

I would like to see if the idea I have for an experiment is even worth the effort and money to perform. I would like to use electrical impedance tomography to image a developed thin layer ...
Dallon Penney's user avatar
3 votes
3 answers
389 views

Scanning/photocopying vs. photographing the material

Why do scanners and photocopies scan the material? Couldn't they just have a digital camera + light behind the glass? A lens with fixed focus would suffice, since the sheet of paper would always be ...
Quora Feans's user avatar
3 votes
2 answers
15k views

Can an IR camera be used in broad daylight?

I am wondering if it is at all possible to have an IR camera that can be faithfully used in broad daylight. I have already seen this question here, but I am looking to understand if a full blown ...
TheGrapeBeyond's user avatar
3 votes
3 answers
2k views

Arduino LCD Display drawing image issue

I am playing with 3,5" (400x240 chinese unknown 8-bit controller driven) TFT display which is placed into Arduino Mega 2560 R3 board. My final goal is taking .raw data from SD card and drawing it on ...
Neil Galiaskarov's user avatar
3 votes
2 answers
3k views

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 ...
M.mhr's user avatar
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3 votes
2 answers
18k views

What is Subsampling in image processing?

I was going through some image processing document. And I came cross this term "sub sampling". What does it mean? Is it sampling again already sampled data .. ?
tollin jose's user avatar
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3 votes
1 answer
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Whether phase congruency and phase coherence terms are same or different?

I am studying the importance of phase in signal.Can anybody explain what is phase congruency ? Also,I am confused between terms i.e. phase congruency and phase coherence. Whether phase congruency and ...
pandu's user avatar
  • 285
3 votes
4 answers
26k views

Embedded system for image processing project

Is it possible to do image processing (to extract numbers and text) using a microcontroller? If not, what are the alternatives to do this task?
lokhesh's user avatar
  • 33
3 votes
1 answer
283 views

Why does increasing sampling density in the frequency domain separate overlapping artifacts in the spatial domain?

I have employed the fourier(projection) slice theorem in matlab. I have a 3D image, P(x,y,z) defines their pixel intensities at a given location int he image volume, it is discrete and uniform. I take ...
user1084113's user avatar
2 votes
3 answers
12k views

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 ...
J Fung's user avatar
  • 21
2 votes
5 answers
3k views

How to convert an array of pixels to jpg or png?

I am doing image processing project in VHDL. And as output am getting array of pixels (32 bit each). I want test this output data visually, for that it must be converted to image either png or jpg or ...
tollin jose's user avatar
  • 3,142
2 votes
2 answers
889 views

Color binning on Bayer sensor

Is there a difference between doing binning on a Bayer sensor before or after the ADC with respect to spatial information lost? How the debayering works should not matter, Assuming the same method ...
LV3's user avatar
  • 121
2 votes
2 answers
4k views

Detecting absolute position

I am working on project that requires me to detect the position of a pen on a piece of normal paper. My first thought was to use 4 IR LEDs on a receiving unit set at the top of the page, and to put ...
Reid's user avatar
  • 2,040
2 votes
2 answers
1k views

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 ...
esencia's user avatar
  • 45
2 votes
1 answer
116 views

Thoughts on making a hand-held OCR

I have an electronic project about a OCR that could be held in hand and used like a Tipp-Ex mouse (image) to scan words. As I am an amateur in electronics, I don't really know what sensor(s) I can use ...
Cranium's user avatar
  • 123
2 votes
0 answers
163 views

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 ...
Alberto Chiusole's user avatar
1 vote
1 answer
2k views

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?
krithik's user avatar
  • 11
1 vote
4 answers
2k views

Image processing hardware options

My imaging system currently produces a stream of digitized video data at 10Msps. That is, parallel 12bit ADC output at 10MHz. The next step is to collect the data in 1024*1024 chunks and perform image ...
Nazar's user avatar
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1 vote
3 answers
2k views

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 ...
DIP_fan's user avatar
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1 vote
1 answer
189 views

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 ...
Anubhav's user avatar
  • 61
1 vote
1 answer
4k views

Raw RGB from CMOS image sensor to grayscale conversion

I am trying to produce an image with OV7740 color image sensor. As far as I know, the sensor is configured by default to provide 10bit parallel RAW RGB data (due to an on-chip Bayer filter). How ...
Nazar's user avatar
  • 3,172
1 vote
2 answers
91 views

Using CMOS to detect transmittance in sample from LEDs

I am trying to get the transmittance through various liquid samples using specific wavelength LEDs. Originally I was experimenting with photodiodes, but do not seem to be ideal. The target color ...
Subpar Greg's user avatar
1 vote
1 answer
60 views

Need to use decoded image as reference image, not original. Why?

I'm trying to review the P frame. but I don't understand this "Why not we use original image instead decoded image to P-frame?"
Carter's user avatar
  • 607
1 vote
1 answer
163 views

What is the appropriate name for camera modules/sensors? And what kind of supporting circuirty is needed?

I have seen CMOS Imaging Sensors (OmniVision, Aptina, ST, etc) as well as Camera modules (like the ones in smartphones; e-con, OmniVision, etc), and I know there are the finished product cameras (...
KingsInnerSoul's user avatar
1 vote
1 answer
165 views

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 ...
Sondes Mgadmi's user avatar
1 vote
2 answers
1k views

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, ...
Gmae's user avatar
  • 13
1 vote
2 answers
74 views

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 ...
aizhan_maksatbek's user avatar
1 vote
1 answer
874 views

How do I find a "pin readout" equivalent for this omnivision cameracube?

I need to know how to connect this omnivision cameracube to a pcb but I don't know what any of the connections on the bottom of the camera correspond to. How can I figure this out? http://www.digikey....
user18002's user avatar
1 vote
3 answers
475 views

I want to learn enough image and video processing to execute a project idea, pointers?

First of all, I am a total newbie to image processing. I have a project idea, part of which will involve doing the following: I have a white board and a camera (a normal webcam by z-star). I will draw ...
Rick_2047's user avatar
  • 3,917
1 vote
1 answer
204 views

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 ...
stronk_kisik's user avatar
1 vote
2 answers
2k views

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 ...
prakash Sri's user avatar
1 vote
1 answer
655 views

nrf24 bluetooth image transfer

I'm trying to build "arducam-bluetooth-module-wireless-image-system" using an NRF24L01. I wish to have a long range transfer of a single image from a remote location to my Android phone whenever it ...
CoffeeShopDJ's user avatar
1 vote
1 answer
581 views

Self Balancing Robot using Computer Vision

I'm planning to implement a Self Balancing Robot which is usually implemented using a gyroscope sensor which gives feedback to the micro-controller to adjust the position with wheels. I'm looking into ...
Kishore Kumar's user avatar
1 vote
2 answers
266 views

Displacement Sensor [closed]

I am working on a project where I need to measure lengt of the objects floating on a surface. To perform that kind of sensing I am currently focusing on mouse sensors. I first tried ADNS 6010; ...
Furkan Turan's user avatar
1 vote
0 answers
59 views

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 ...
ghostOfElysium's user avatar
1 vote
1 answer
110 views

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 ...
kakeh's user avatar
  • 602
0 votes
3 answers
2k views

Transmitting data from MATLAB to FPGA

This is about design of a JPEG compression/decompression scheme on an Altera FPGA. It is possible to have camera or SD card for image input and TV or SD card for image output. However, these ...
quantum231's user avatar
  • 11.8k
0 votes
1 answer
2k views

How a decoded picture is stored in a memory? [closed]

If we decode an image (any format) we will get matrix of pixels. For example consider a picture with resolution 10x10 and colour depth of 16777216. Therefore pixel is represented by 24 (888 RGB) bit ...
tollin jose's user avatar
  • 3,142
0 votes
1 answer
68 views

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.
Peouse Dutta's user avatar