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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41 views
How to process image processing with Cadence RTL compiler or Synopsis?
I know the other simple option is Using Xilinx BRAM. But I wanted to synthesize image processing algorithm with encounter RTL cadence tool. How Can I read input image here? I found in the journal that ...
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1answer
48 views
Arduino/IC Picture Scanner [duplicate]
For a project I am working on, I need some kind of way for a micro-controller (preferably Arduino, since I have background knowledge) to identify a certain symbol on a piece of paper (e.g. recognising ...
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1answer
44 views
Interface 10 image sensors to Linux CPU
I need to process image data from 10 image sensors simultaneously (namely from OnSemi MT9V022s or similar). All 10 sensors will be externally triggered by a common signal. Ideal solution would be to ...
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1answer
59 views
Analyse images before storing them in memory [closed]
Physicist here, so please be gentle ;-) I am designing a device to acquire in a few seconds a large amounts of images (a few terabytes), that then need to be analysed, possibly on the fly. Is there a ...
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0answers
33 views
Noise appears in image when IC is cold, disappear once getting hotter
We're using ADDI 7004 to convert signal from CCD to image, but one strange thing we observe is that when the board boots from cold, there are a lot of noise on the image, but once the ADC getting ...
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1answer
32 views
What are my options for a processor to fulfill the requirement of a video signal processing application? [closed]
I 'm a collage student and I 'm designing an embedded system of a smart camera for traffic surveillance as my graduation bachelor project. The camera does the following:
Monitors a traffic lane with ...
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2answers
57 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 ...
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3answers
219 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 ...
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2answers
58 views
What sizes are detectable from 1m using a fairly good cmos camera?
I haven't ordered a CMOS camera module yet, but I am planning to use it to detect a small object from ~1-1.5 meters.
Just too be specific, say I am using the following CMOS camera (although if you ...
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3answers
298 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 ...
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1answer
64 views
Does JPEG compression is lossy or not? [closed]
As I know, generally, the JPEG is consist of DCT, Q ,Huff.
But I'm not sure which one is lossy? all of them? of just Q?
I think Q is lossy but else not. I just want to know that.
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1answer
128 views
How fast cpu clock do you need to control camera?
I'm making a camera system with CMOS image sensor and micro controller. But I don't know yet how fast cpu clock I need. Assuming that I use 5MP cmos image sensor and take just still image with 1fps, ...
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1answer
48 views
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 ...
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1answer
205 views
how to count number of white pixels in a binary image using xilinx system generator
After doing certain pre processing on image serialized image will be obtained. Once we do thresh holding binary image will be displayed. How do I count the number of white pixels in a binary image ...
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1answer
40 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?"
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5answers
613 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 ...
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1answer
144 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 ...
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2answers
2k 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 .. ?
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1answer
47 views
What is “Configurable clipping rectangles”?
I was going through the features of one Graphics accelerator-IP core. And one important feature of this graphics accelerator is "configurable clipping rectangle". Can any one help me to under stand ...
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3answers
846 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 ...
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1answer
397 views
ARM Processor or FPGA to video signal processing? [closed]
I want to design a PCB where a video camera will take images and they will be shown in a display HD. So I have several questions in order to achieve it: I would like to know what is the best option ...
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1answer
77 views
How choose MPU for image streaming and transmission
I want to ask how to choose and how much processing power are required to be able to stream video using a wifi module. I'll explain better; I have a camera sensor of 5Mpx, i want to elaborate video ...
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1answer
537 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 ...
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4answers
5k 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?
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3answers
922 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 ...
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4answers
232 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 ...
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2answers
2k 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 ...
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3answers
157 views
Why does a screen resoltion is same for both a mobile phone and a 60inch TV Screen? [closed]
Resolution of say 1080 x 720 means 1080 vertical lines of pixels and 720 horizontal line of pixels. This means a total of 777,600 numbers of pixels across the width and breadth of the screen. Now for ...
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1answer
93 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 ...
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1answer
118 views
Can infrared cameras be used in the presence of light or is it compulsory it has to be used in the dark, to get a thermal image of the desired object? [closed]
The question I asked could seem silly but I was wondering if there was a way of capturing the heat signatures of objects or people even during the day time. Also if we were to use an infrared camera, ...
2
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1answer
87 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 ...
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1answer
212 views
displaying JPEG images [closed]
I want to display images(JPEG) stored in a SD card, I want the output to be VGA so that I can display them in readily available display modules.
Any idea on how this can be done?
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1answer
224 views
How can I decide whether I can use a Raspberry Pi for my application?
How do I calculate whether some specific hardware can run my code with a given speed?
It's an image recognition software, and a simplified version of the algorithm is:
Grab a frame (in RGB, ...
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1answer
1k views
What is the synthesizable VHDL method for loop or memory module?
I have an image processing application, first step is to do a thresholding operation (binarization). I don't know really if it better to use for loop (2-dimensional array) or to use a memory. If I ...
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1answer
430 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 ...
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1answer
536 views
Coherence factor in Delay-And-Sum-Beamformer: Triangle Inequality
I'm writing a delay-and-sum-beamformer in MATLAB that incorporates a so-called and widely used coherence factor CF. Now I'm confused about the math behind that ...
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1answer
581 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?
...
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3answers
2k views
Good FPGA / Micorcontroler development board for real time image processing
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 ...
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1answer
183 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 ...
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4answers
358 views
M.S. Math to Engineering Ph.D : Mathematics in Electrical Engineering
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. ...
2
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2answers
2k 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 ...
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1answer
403 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 ...
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2answers
206 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; ...
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1answer
728 views
How CIS (contact Image sensor ) works?
I'm working on a project that needs a CIS sensor
All I can understand that this sensor output an analogue signal that I take on ADC & store the data & process on it .
I will use this ROHM ...
5
votes
1answer
322 views
Using an inertial measurement unit to compute global motion optical flow of video
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 ...
5
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7answers
699 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 ...
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1answer
168 views
Recommendation of actuator
I had posted about my project earlier in this forum:
PID algorithm implementation using computer vision
Now I am currently stuck in a stage whether I am concerned whether I chose the wrong actuator.
...
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2answers
1k views
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 ...
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2answers
54 views
Transforming image for close eye viewing
If I were to print a image on a transparency and hold it really close to my eyes (the same distance as glasses on my spectacles) the image would become blur and I would be able to see the background ...
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2answers
120 views
Electronic pan/tilt camera
Is it possible to conceive of a system that would use a stationary camera with a fish-eye lens to effectively provide the same images as a camera that was actually panning and tilting.
