Bibliographic record
Abstract
This thesis is part of a feasibility study concerned with the application of the Gabor Hologram to a proposed method of bandwidth compression of television (video) signals obtainable by scanning a restricted class of two tone pictures: the experimental work consists of producing and improving on the Gabor type Holograms and demonstrating the reconstruction. The proposed television system will employ two channels. One channel would be used to transmit the signal obtained by scanning the picture normally; the bandwidth allowed for this channel, though, would be much less than the normal bandwidth: the other channel of equally reduced bandwidth would be used to transmit the signal obtained, again by normal scanning, from the Hologram. At the receiver, optical superposition of the two pictures obtained from the two channels would be made. For a certain restricted class of two tone pictures the distortion produced at the receiver by this method of picture transmission is anticipated to be negligible. The Fourier transform property of the Hologram is specially developed in order to complement the two channel television system. Considering the transform point of view it has been shown theoretically that the reconstruction lens suggested by Gabor is not necessary for the two step imaging process and a lensless system has been developed. It is demonstrated that better quality results can be obtained by using the modified process. In the experimental setup a positive lens necessary to widen the laser beam is used. The effect of the noisy Airy rings created by this lens is studied and a pinhole method of removing the noise has been suggested and its effectiveness demonstrated experimentally. Finally some examples of two step imaging using the modified lensless system are given. The detailed account of the experimental work is given to facilitate future work.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".