A search is enabled for an adjustment value with which a good blur correction effect is obtained by blur correction processing as an optical adjustment value of an image projection device, and blur correction performance is improved in a case where correction of a focus blur that occurs in a projection image is performed by signal processing. An image processing device according to the present technology includes: a blur correction unit that performs blur correction processing for focus blur correction on an input image on the basis of a blur characteristic that is a characteristic of a focus blur that occurs in a projection image of an image projection device, the blur characteristic being measured in a state where a predetermined candidate value is set as an optical adjustment value of the image projection device; and a use determination unit that performs evaluation regarding the focus blur on a projection image obtained by causing the image projection device to project an image subjected to the blur correction processing, and performs determination regarding whether or not the candidate value is usable on the basis of a result of the evaluation.

Embodiments of the present application relate to the technical field of projection, and in particular, relate to a projection method and a projection device. The projection method includes: acquiring a projection image and an environmental image when a screen picture is projected to a projection region, wherein the environmental image includes an image when a predetermined projection screen picture is projected to the projection region or an image when no screen picture is projected to the projection region; regulating an aperture based on the projection image and the environmental image, wherein the aperture is configured to control a light flux projected to the projection region. Therefore, by adjusting the light flux, impacts caused by the stray light may be mitigated, and a relationship between projection contrast and luminance may be better coordinated, such that the projection contrast and luminance are effectively balanced and hence projection quality is improved.

Embodiments of the present application relate to the technical field of projection, and in particular, relate to a projection method and a projection device. The projection method includes: acquiring a projection image and an environmental image when a screen picture is projected to a projection region, wherein the environmental image includes an image when a predetermined projection screen picture is projected to the projection region or an image when no screen picture is projected to the projection region; regulating an aperture based on the projection image and the environmental image, wherein the aperture is configured to control a light flux projected to the projection region. Therefore, by adjusting the light flux, impacts caused by the stray light may be mitigated, and a relationship between projection contrast and luminance may be better coordinated, such that the projection contrast and luminance are effectively balanced and hence projection quality is improved.

A projection optical apparatus includes a projection system projecting light and including a resin lens, a degradation suppressor configured to suppress degradation of the resin lens, and a projection controller configured to control the degradation suppressor.

A projector includes a lens, a displacement adjusting unit, an imaging unit, a temperature sensing unit, a storage unit and a processing unit. The displacement adjusting unit is connected to the lens. The temperature sensing unit senses a current temperature. The storage unit stores a plurality of temperature ranges and a plurality of displacement variations corresponding to the temperature ranges. The processing unit receives a current image. The processing unit compares the current temperature with the temperature ranges to determine a current displacement variation corresponding to the current temperature from the displacement variations. The processing unit performs at least one of following steps according to the current displacement variation: controlling the displacement adjusting unit to adjust a displacement of the lens; adjusting a displacement of the current image on the imaging unit; and performing an image adjusting process for the current image.

An LCD projector optical system includes: an LED light source, a transflective plate, a condensing device, a first focusing lens, a polarization modulation plate, a brightness-increasing polarizing plate, an LCD light valve, a field lens, a reflector, and a projection lens, which are all arranged sequentially along a light travel direction; wherein the transflective plate has a light-transmitting portion and a reflecting portion. Light from the LED light source enters the condensing device from the light-transmitting portion, and then transmitted light and reflected light in illumination light are separated by the brightness-increasing polarizing plate. A beam of polarized light useless for the LCD light valve is reflected back and condensed by the first focusing lens and the condensing device on the reflection portion and the light-transmitting portion of the transflective plate, and then reflected back to the brightness-increasing polarizing plate through the reflection portion and the light-transmitting portion.

An LCD projector optical system includes: an LED light source, a transflective plate, a condensing device, a first focusing lens, a polarization modulation plate, a brightness-increasing polarizing plate, an LCD light valve, a field lens, a reflector, and a projection lens, which are all arranged sequentially along a light travel direction; wherein the transflective plate has a light-transmitting portion and a reflecting portion. Light from the LED light source enters the condensing device from the light-transmitting portion, and then transmitted light and reflected light in illumination light are separated by the brightness-increasing polarizing plate. A beam of polarized light useless for the LCD light valve is reflected back and condensed by the first focusing lens and the condensing device on the reflection portion and the light-transmitting portion of the transflective plate, and then reflected back to the brightness-increasing polarizing plate through the reflection portion and the light-transmitting portion.

Provided are apparatuses and associated methods for video communications and related features. In one embodiment, a big-screen video communications apparatus is provided that includes a projector and speaker for projecting received images and sounds and includes a camera and microphone for capturing images and sounds for transmission.

Provided are apparatuses and associated methods for video communications and related features. In one embodiment, a big-screen video communications apparatus is provided that includes a projector and speaker for projecting received images and sounds and includes a camera and microphone for capturing images and sounds for transmission.

An electronic apparatus, comprises a projection unit configured to project an image, a measurement unit configured to measure a distance to an object, a projection control unit configured to control, based on the distance to the object measured by the measurement unit, projection of the image by the projection unit so that the image projected onto the object has a preliminarily set actual size length.