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EP-4740485-A1 - ZOOMING TECHNIQUE BY ITERATIVE DISPLAYING OF NEW IMAGES

EP4740485A1EP 4740485 A1EP4740485 A1EP 4740485A1EP-4740485-A1

Abstract

A technique for enlarging an area of interest (Z1) in an image (I1) by obtaining and displaying a new image (I2) comprising said area of interest (Z1) at a size and sharpness level adjusted according to a user's instruction. A method, a computer program, a device and an apparatus therefor.

Inventors

  • LEGROS, ERIC
  • PETITGRAND, Sylvain
  • LUONG, BRUNO

Assignees

  • Fogale Optique

Dates

Publication Date
20260513
Application Date
20230708

Claims (14)

  1. 1. Method (100, 300) for representing a scene on a display medium (410, 512, 612, 712, 812), comprising: - a display step (102), on the display medium, of an image (11) of said scene, - at least one iteration of an enlargement phase (104) comprising the following steps: ■ detection (106) of an enlargement instruction for a zone of interest (Zl) of the displayed image, ■ obtaining (108, 200) a new image (12) comprising said area of interest (Zl) with a size and a level of sharpness adjusted according to the enlargement instruction, ■ display (110), on the display medium, of the new image (12).
  2. 2. Method (100, 300) according to claim 1, in which the step of obtaining (108, 200) a new image (12) comprises a selection (206) of an image in a stack (PI) of images.
  3. 3. Method (100, 300) according to claim 2, wherein the stack (PI) of images comprises images having one or more areas of interest including images in which, for at least one of said areas of interest, this area of interest has a respective size and/or level of sharpness.
  4. 4. Method (100, 300) according to claim 2 or 3, in which the selection (206) of an image in the stack (PI) is carried out as a function of information on the position and size of the area of interest associated with each of the images in the stack (PI).
  5. 5. Method (100, 300) according to any one of claims 2 to 4, in which the stack (PI) of images comprises at least one image captured by an imaging device.
  6. 6. Method (100, 300) according to any one of claims 2 to 5, in which the stack (PI) of images comprises at least one image obtained by calculation or by simulation, from at least one other image.
  7. 7. Method (100, 300) according to any one of claims 1 to 6, wherein, during at least one iteration of the enlargement phase (104), the area of interest (Zl) of the new image (12) comprises one or more objects (03) absent from the displayed image (11).
  8. 8. Method (100, 300) according to any one of claims 1 to 7, comprising, before the step of displaying (110) the new image (12), a step of enhancing the contrast of the new image (12) as a function of the enlargement instruction.
  9. 9. Method (100, 300) according to any one of claims 1 to 8, in which the step of detecting (106) the enlargement instruction comprises a detection of an action of a user, such as a rotation of a mouse wheel, a movement of one or more fingers on a touch screen, a prolonged viewing of said area of interest, or even a position of a part of the user's body and/or of a device worn by the user.
  10. 10. Method (100) according to any one of claims 1 to 9, comprising several iterations (112) of the enlargement phase (104).
  11. 11. Computer program comprising executable instructions which, when executed by a computing device, implement all the steps of a method (100, 300) according to any one of claims 1 to 10.
  12. 12. Device (400) comprising means (402) configured to implement all the steps of a method (100, 300) according to any one of claims 1 to 10.
  13. 13. Apparatus (510, 610, 710, 810) comprising: - a display support (512, 612, 712, 812), - a means for detecting an enlargement instruction (514, 714, 814, 816), and - a means for obtaining an image (402), configured to implement all the steps of a method (100, 300) according to any one of claims 1 to 10.
  14. 14. Apparatus (510, 710, 810) according to claim 13, wherein the detection means (514, 714, 814) is formed by the display medium (512, 712, 812).

Description

DESCRIPTION Title: Zoom technique by iterative display of new images Technical field [0001] The invention relates to the field of displaying images, in particular digital images, on a display medium such as a screen or a projection surface. [0002] The invention relates more specifically to a zoom technique, the notion of zoom being defined as an enlargement of an area of interest of a displayed image. [0003] The invention relates to a method for representing a scene on a display medium, a computer program, as well as a device and an apparatus implementing such a method. State of the prior art [0004] Many devices, for example smartphones, make it possible to display an image and to enlarge an area of interest of the displayed image based on instructions from a user wishing, for example, to observe in more detail objects present in the area of interest. The sharpness of this area and the objects it contains typically depends on the focal length used when capturing the image. [0005] There is a need to improve techniques for displaying images and for enlarging images so displayed. [0006] The invention aims in particular to provide an image display technique making it possible to improve the visualization of areas of interest by a user. Disclosure of the invention [0007] To this end, the invention relates to a method for representing a scene on a display medium, comprising: - a step of displaying, on the display medium, an image of said scene, - at least one iteration of an enlargement phase comprising the following steps: ■ detection of an enlargement instruction for an area of interest in the displayed image, ■ obtaining a new image comprising said area of interest with a size and a level of sharpness adjusted according to the enlargement instruction, ■ display, on the display medium, of the new image. [0008] The invention thus makes it possible to display on the display medium an image whose area of interest has a size and a level of sharpness which are specifically adapted to the demand of a user expressed in the form of an enlargement instruction. Thus, under the action of a modification of the enlargement instruction, the method of the invention makes it possible to display a succession of images whose level of sharpness is adapted to the size of the area of interest. [0009] The invention therefore makes it possible to display an image with a quality adapted to the need, in other words, to personalize the display of the scene so that the area of interest observed and enlarged by the user is always clear. [0010] In one embodiment, the step of obtaining a new image comprises selecting an image from a stack of images. [0011] In one embodiment, the image stack comprises images having one or more areas of interest including images in which, for at least one of said areas of interest, that area of interest has a respective size and/or sharpness level. [0012] For example, considering a first image and a second image in the stack, the first image may define an area of interest having a first size and a first sharpness level, while the second image may define said area of sharpness according to a second size and a second sharpness level. In a non-limiting manner, the second size may be larger than the first size and the second sharpness level may be larger than the first sharpness level. [0013] For another example, considering three images of the stack each defining a first area of interest and a second area of interest, the first area of interest may have on the one hand a first size and a first level of sharpness in the first image and in the second image and, on the other hand, have in the third image a second size and a second level of sharpness respectively greater than the first size and the first level of sharpness. In this example, the second area of interest may have on the one hand a first size and a first level of sharpness in the first image and in the third image and, on the other hand, have in the second image a second size and a second level of sharpness respectively greater than the first size and the first level of sharpness. [0014] In the non-limiting examples which have just been described, a change in the size of the area of interest from one image to another is associated with a corresponding change in the level of sharpness. Thus, more generally, the stack may include images in which at least one area of interest has both a different size from one image to another and a different level of sharpness from one image to another. [0015] Of course, the stack can also comprise, alternatively or additionally, images in which at least one area of interest has either a different size from one image to another or a different level of sharpness from one image to another. [0016] In one embodiment, the selection of an image in the stack is carried out according to information on the position and size of the area of interest associated with each of the images in the stack. [0017] Said information on positi