Abstract: A plurality of flicker detection frames are formed by dividing an image into a plurality of frames. A flicker detection circuit performs detection of luminance data for each of the flicker detection frames. The differences between the luminance data of the preceding frame and the current frame, and between the luminance data of the current frame and the following frame with respect to each of the flicker detection frames are taken, a flicker component is extracted, and the flicker frequency is calculated, by a flicker frequency determination program in a microcomputer. Then, the space between the flicker detection frames in which a crest or trough of the extracted flicker component appears is measured, and the results are converted into the flicker frequency. The frame rate of the image pickup signals is controlled so as not to be synchronized with the flicker frequency.

Abstract: A plurality of flicker detection frames are formed by dividing an image into a plurality of frames. A flicker detection circuit performs detection of luminance data for each of the flicker detection frames. The differences between the luminance data of the preceding frame and the current frame, and between the luminance data of the current frame and the following frame with respect to each of the flicker detection frames are taken, a flicker component is extracted, and the flicker frequency is calculated, by a flicker frequency determination program in a microcomputer. Then, the space between the flicker detection frames in which a crest or trough of the extracted flicker component appears is measured, and the results are converted into the flicker frequency. The frame rate of the image pickup signals is controlled so as not to be synchronized with the flicker frequency.

Abstract: A plurality of flicker detection frames are formed by dividing an image into a plurality of frames. A flicker detection circuit performs detection of luminance data for each of the flicker detection frames. The differences between the luminance data of the preceding frame and the current frame, and between the luminance data of the current frame and the following frame with respect to each of the flicker detection frames are taken, a flicker component is extracted, and the flicker frequency is calculated, by a flicker frequency determination program in a microcomputer. Then, the space between the flicker detection frames in which a crest or trough of the extracted flicker component appears is measured, and the results are converted into the flicker frequency. The frame rate of the image pickup signals is controlled so as not to be synchronized with the flicker frequency.

Abstract: An image pickup apparatus which can remove flickers appearing in a frame of a solid-state image pickup device is disclosed. A light amount detector (2) is provided in the proximity of a sensor light receiving section (1), and the amount of light incoming to the sensor light receiving section (1) is normally monitored by the light amount detector (2). Detection data of the light amount detector (2) is signaled to a light amount detection data processing section (correction value calculation section) (4). The light amount detection data processing section (4) detects a current light amount condition based on the detection data inputted thereto and calculates correction data for removal of flickers based on the detected current light amount condition. A microcomputer performs an calculation process to obtain a maximum value and a minimum value of the light amount to detect the period of light emission of a light source.

Abstract: A sample-and-hold circuit and an analog-to-digital conversion circuit are provided, and a latch circuit is provided downstream of the analog-to-digital conversion circuit. For example, a correlated double sampling (CDS) circuit is configured in which a first latch circuit is disposed downstream of the analog-to-digital conversion circuit and a second latch circuit is disposed downstream of the first latch circuit. Delayed output signals of the respective latch circuits are sent to a calculation section, which takes subtraction between those output signals. Resulting data is output via another latch circuit.

Abstract: A plurality of flicker detection frames are formed by dividing an image into a plurality of frames. A flicker detection circuit performs detection of luminance data for each of the flicker detection frames. The differences between the luminance data of the preceding frame and the current frame, and between the luminance data of the current frame and the following frame with respect to each of the flicker detection frames are taken, a flicker component is extracted, and the flicker frequency is calculated, by a flicker frequency determination program in a microcomputer. Then, the space between the flicker detection frames in which a crest or trough of the extracted flicker component appears is measured, and the results are converted into the flicker frequency. The frame rate of the image pickup signals is controlled so as not to be synchronized with the flicker frequency.

Abstract: A sample-and-hold circuit and an analog-to-digital conversion circuit are provided, and a latch circuit is provided downstream of the analog-to-digital conversion circuit. For example, a correlated double sampling (CDS) circuit is configured in which a first latch circuit is disposed downstream of the analog-to-digital conversion circuit and a second latch circuit is disposed downstream of the first latch circuit. Delayed output signals of the respective latch circuits are sent to a calculation section, which takes subtraction between those output signals. Resulting data is output via another latch circuit.