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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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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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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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
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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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923 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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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
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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
22k 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
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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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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
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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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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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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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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, ...
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1answer
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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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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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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, 640x480)....
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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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2answers
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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
772 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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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....
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3answers
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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 ...
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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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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. ...
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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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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
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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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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 ...
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1answer
381 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 ...
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7answers
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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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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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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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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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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.
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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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3answers
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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 ...

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