Return on investment

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Return on investment

(ROI)
An economic indicator that is used to evaluate the effectiveness of an investment. It is calculated as the ratio of the amount gained or lost relative to the amount invested. Simple ROI analyses do not take the time value of money into account; dynamic ROI analyses recognize that the value of money changes over time.
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The Maxshift method recommended by JPEG2000 can support ROI coding for medical image efficiently.
The basic idea of ROI coding is that certain parts of the image that are of higher importance than others are encoded at higher quality than the background (BG) and are transmitted first or at a higher priority [1]-[5].
The Maxshift method exploits the possibility of representing an arbitrarily shaped ROI by shifting the ROI coefficient values on the top of the BG coefficient range.
In this paper, we presented a new and efficient ROI coding method for medical image based on bitplane shift scheme, which is called general layered bitplane shift (GLBShift) method.
ROI image coding is a new feature in JPGE2000, which allows ROI to be coded with better quality than the rest of an image.
1(a), the general scaling based method can place ROI associated bits in the higher bitplanes by downshifting the bits of BG coefficients from Most Significant Bitplane (MSB) to Least Significant Bitplane (LSB), so that ROI coefficients can be coded firstly after the wavelet transform.
Second, if arbitrary ROI sharps are desired, the shape coding will consume a large number of bits, which significantly decreases the overall coding efficiency.
So the current standard restricts ROI shape to be rectangle and ellipse [2].
In other words, it is a particular case of the general scaling-based method when the scaling value is so large that there is no overlapping between BG and ROI bitplanes.
Our ROI model is conservative, focusing purely on the transaction efficiencies and cost reductions obtained by optimizing information flow with your existing trading partners," said Willis.
To keep it simple, we're not counting the soft dollar benefits, potentially significant ROI and competitive advantage that come from the implementing IPNet's supply chain collaboration solution.
By integrating and synchronizing information real-time between trading partners, IPNet unleashes the ROI of legacy systems.
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