Image signal processing apparatus and control method therefor
AssigneeCanon Kabushiki Kaisha
InventorHiroya Miura
Life of this patent
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Abstract
Disclosed is an image signal processing apparatus with a function to display an image signal and a luminance waveform representing a relationship between a luminance level and a position in the image signal. The apparatus displays the image signal such that a predetermined color is applied to an area whose luminance level falls within a preset luminance level range. On the other hand, the luminance waveform of the image signal is displayed such that a color corresponding to the predetermined color is applied to an area corresponding to the luminance level range.
Claims15
An image signal processing apparatus that can display an image signal that represents a subject image and a luminance waveform that represents relations between luminance levels and their appearance frequencies at respective positions in a horizontal or vertical direction of the subject image, on a display unit, the image signal processing apparatus comprising:
- at least one processor;
- and
- a memory that stores a program executable by the at least one processor, wherein the program, when executed by the at least one processor, causes the at least one processor to function as a display control unit that:
- controls displaying the image signal and the luminance waveform so that (i) an area of the image signal corresponding to a first luminance level range and (ii) an area of the luminance waveform corresponding to the first luminance level range are displayed in a predetermined same color or predetermined similar colors;
- wherein the image signal that represents the subject image and the luminance waveform are displayed on the display unit, and
- wherein the display control unit further controls displaying the image signal and the luminance waveform so that, for each of different luminance level ranges of the image signal including the first luminance level range, an area of the image signal and an area of the luminance waveform, both of which corresponds to a same luminance level range, are displayed in a predetermined same color or predetermined similar colors being different for each of the different luminance level ranges.
A control method for image signal processing apparatus that can display an image signal that represents a subject image and a luminance waveform that represents relations between luminance levels and their appearance frequencies at respective positions in a horizontal or vertical direction of the subject image, on a display unit, the control method comprising:
- displaying the image signal and the luminance waveform so that (i) an area of the image signal corresponding to a first luminance level range and (ii) an area of the luminance waveform corresponding to the first luminance level range are displayed in a predetermined same color or predetermined similar colors;
- wherein the image signal that represents a subject image and the luminance waveform are displayed on the display unit, and
- wherein in the displaying, for each of different luminance level ranges of the image signal including the first luminance level range, an area of the image signal and an area of the luminance waveform, both of which corresponds to a same luminance level range, are displayed in a predetermined same color or predetermined similar colors being different for each of the different luminance level ranges.
A non-transitory computer-readable storage medium having stored therein a program for causing a computer to function as image signal processing apparatus that can display an image signal that represents a subject image and a luminance waveform that represents relations between luminance levels and their appearance frequencies at respective positions in a horizontal or vertical direction of the subject image, on a display unit, the image signal processing apparatus comprising:
- a display control unit that controls displaying the image signal and the luminance waveform so that (i) an area of the image signal corresponding to a first luminance level range and (ii) an area of the luminance waveform corresponding to the first luminance level range are displayed in a predetermined same color or predetermined similar colors;
- wherein the image signal that represents the subject image and the luminance waveform are displayed on the display unit, and
- wherein the display control unit further controls displaying the image signal and the luminance waveform so that, for each of different luminance level ranges of the image signal including the first luminance level range, an area of the image signal and an area of the luminance waveform, both of which corresponds to a same luminance level range, are displayed in a predetermined same color or predetermined similar colors being different for each of the different luminance level ranges.
Dependencies are inferred from the claim text.