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VVDN, with its unmatched expertise in camera design and Image & video calibration, has worked with various clients globally. Our engineers understand that each combination of sensor, processor, and lens is unique and the captured image needs to be processed and tuned to get the desired output.

VVDN has set up in-house image tuning labs with state-of-the-art equipment providing a wide range of image tuning services. We at VVDN develop, port & build custom imaging algorithms to deliver the most optimal solutions for various use-cases for different industries.

Why VVDN?

VVDN team comes with unmatched expertise in imaging, ISP tuning, sensor characterization, calibration covering a wide array of sensors, platforms, and applications. Our specialized in-house image quality tuning and testing lab are designed to accelerate camera development to deliver vision solutions powered in a faster time to market.

Image Signal Processing Tuning

3A system-level algorithm including Autofocus (AF), Auto Exposure (AE), and Auto White Balance (AWB) tuning
Image quality by eliminating unwanted dark or shaded edges.
3x3 color matrix method for color correction
Gamma correction and tone mapping to map one set of colors to another approximate the appearance of high-dynamic-range (HDR)

Imaging Laboratory

ISO resolution charts & color tests under controlled lighting
TE42 chart - noise, sharpness, subjective scenes, color, texture
Q13 chart/Q14 chart - visually detectable steps
Light booth – to create different light conditions for sharpness & contrast
Kino Flo LED DMX lighting - color temperature:- 2700K - 6500K
Macbeth ColorChecker - color fidelity, noise, AWB

Image Quality Subjective Analysis

Optimizing each stage of the Image pipeline for a particular application
Intensifying the image and video quality to be sharper and clearer with color accuracy.
Use of subjectively correlated image quality metrics and outlines a framework for camera benchmarking.
Noise reduction and other ISP parameters to deliver the optimum image quality.

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OUR EXPERTISE

Complete measurement setups to compute a characteristic parameter accurately and precisely for most essential image sensor parameters with a CMOS/CCD sensor

Readout noise
Updated software library and hardware tools

Linearity and photon noise
Quantum efficiency and spectral response

Photoresponse curve
Modulation transfer function

Noise and Non-uniformity
Dark current

When testing for camera shading in our test labs, we ensure and evaluate shading using a matt diffuser chart for the greatest results

Lens shading correction (correct geometric and luminance/color distortions)

Color Shading or color non-uniformity

Luminance shading

VVDN works on 3A digital imaging technology to achieve the maximum image contrast, improve overexposure or underexposure of the subject, and compensate for the chromatic aberration of the picture under different light.

Auto Focus(AF) Algorithm

Auto Exposure(AE) Algorithm

Auto White Balance(AWB) Algorithm

Modifying ISP parameters iteratively for various lighting conditions and circumstances to produce the optimum image quality

Black level adjustment
Color correction
Fine-tuning the image pipeline blocks

Noise reduction
Demosaic (reconstruct colors per pixel)

Exposure control
Expert manually tuned ISP hyperparameters

Gamma correction
Raw data correction (remove defective pixels)

IMAGE TUNING

overview