Videosystem for determining position of colored areas
AssigneeDen Norske Stats Oljeselskap A.S.
InventorIngebret Gausland
Life of this patent
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Abstract
Video system for detection of colored areas on black/white patterned background which comprises a video camera for formation of a set of primary color signals R, G, B and a signal processing unit, which provides information about the recorded area based on a processing of one or more of the signal difference (R-Y), (B-Y), (G-Y) between the primary color signals R, G, B and luminance signal Y. The system can particularly be used for digitalizing of interpreted seismic sections.
Claims7
Video system, particularly for digitalising of interpreted seismic sections, characterised in that said system comprises:
- A. a video camera (1) for formation of a set primary colour signals (R, G, B), and
- B. a signals processing unit (2), which comprises
- a) a Y-matrix (20) and comparators (21, 22) for formation of one or several difference signals (R-Y), G-Y), (B-Y) and a luminance signal (Y),
- b) comparators (23, 24) which compare the difference signals (R-Y), G-Y), (B-Y) with corresponding difference signals (R-Y.sub.s, (G-Y).sub.s, (B-Y).sub.s for a reference colour, and which are capable of providing a logic signal equal to 1 if the difference signals provided to the appropriate circuit are more or less of the same size,
- c) a comparator (25) which compares the luminance signal (Y) with a corresponding luminance signal (Y).sub.s for a reference colour, and which is capable of providing a logic signal equal to 1 if the luminance signals (Y) and (Y).sub.s are more or less of an equal size,
- d) a logic AND-gate (26) which is provided with the output signals from the comparators according to points b) and c), and which provides a logic signal (S) depending on the output signals from the comparators (23, 24, 25),
- e) two A/D-convertors (27, 28) which transform horizontal and vertical deflection signals (x and y) into corresponding digital signals, and,
- f) an output unit (29) which is controlled by the signal (S) from the logic AND-gate (26), and which is capable of providing signals (T.sub.x, T.sub.y) based on the output signals from the A/D-converters (27, 28).
A video system for detecting and positioning of colored areas, said system comprising:
- (a) a video camera for capturing colored information and forming a set of primary color signals, R, G and B;
- and
- (b) a signal processing unit for processing said primary color signals and assigning a position to said primary color signals, said signal processing unit comprising:
- (1) means for generating a first set of signal differences (R-Y), (B-Y), (G-Y) between primary color signals (R, G, B) and a luminance signal (Y);
- (2) means for comparing the first set of signal differences with a second set of signal differences corresponding to signal differences (R-Y).sub.s, (B-Y).sub.2, (G-Y).sub.s between the primary color signals and the luminance signal for a chosen reference color and for providing a logic signal S when corresponding signal differences from the two sets of color differences are within a preset tolerance range (E);
- and
- (3) means for providing an output signal (Tx, Ty or T) containing information about the position of areas having a color corresponding to a chosen reference color on the basis of the logic signal S and signals (X, Y) controlling the image of the recorded surface in the video camera.
Dependencies are inferred from the claim text.